MANAGEMENT OF MERCURY CONTAMINATION AND ITS MONITORING AT PAVLODAR, KAZAKHSTAN

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CONTENT

 

Introduction

 

 

1.

History of mercury electrolyses base chlor-alkali production at the Pavlodar Chemical Plant

 

 

1.1.

General

 

 

1.2.

Chlor-alkali production history

 

 

1.3.

Military history of the plant and its conversion

 

 

2.

Program of demercurization at Pavlodar Chemical Plant

 

 

2.1.

Previous demercurization projects of 1980s

 

 

2.2.

Researches held by JV “Evrohim”, Kiev and Pavlodar Hydrological Field Party

 

 

2.3.

Demercurization design of JV “Evrohim”, Kiev

 

 

2.4.

Proposal of Japan Consulting Institute

 

 

2.5.

Participation of BRGM company

 

 

2.6.

Demercurization activity in 1998-1999

 

 

3.

Assessment of mercury contamination extend in Pavlodar held by Kazakhstani research institutes in 80 – 90s

 

           

3.1.

Researches related to underground and surface water

 

           

3.2.

Researches of potential contamination of Lake Muyaldy

 

           

3.3.

Soil and snow cover study

 

 

3.4.

Soils and surface water study in the framework of INTAS-KZ  95-19 in 97-99

 

 

4.

Risk assessment of mercury contamination in Pavlodar in 2001-2002 in the framework of ICA2-CT-2000-10209 “Toxicmanagement” EU INCO-2 Program

 

 

4.1.

“Toxicmanagement” project

 

 

4.2.

Collection of archival data

 

 

4.3.

Field works

 

 

4.4.

Main results of expeditions

 

 

4.5.

Main results of archival and field data review

 

 

4.6.

Main works on simulation of hydro-geological conditions

 

 

4.7.

Main results of simulation

 

 

4.8.

Conclusion and recommendation

 

 

4.9.

Additional researches of IHH: simulation of hydrogeological processes in the north industrial zone of Pavlodar

 

 

5.

Correction of JV “Evrohim”, Kiev design

 

 

6.

Completion of first Phase of chlor-alkali production demercurization program of 2002 – 2004

 

 

7.

Program of post-demercurization monitoring in Northern industrial area of Pavlodar

 

 

7.1.

Development of the Program of post-demercurization monitoring for 2005–2020

 

 

7.2.

Field study in the Northern industrial area of Pavlodar in September 2004 in the framework of EU 6FP NMP2-CT-2004-505561 “BIOMERCURY” project

 

 

7.3.

Proposal preparation in the framework of International Science and Technology Center

 

 

Conclusion

 

Abbreviation expansion

 

 

References

 

 

Annexes

 

 

A. L.E. Postolov. Chlor-alkali productions with mercury cathode within the former Soviet Union (as of 2008)

 

 

B. Press-release of 15.11.04

 

 

C. Monitoring program for 2005-2020. (Fragment)

 

 

D. Project proposal (fragment) for International Science and Technology Center

 

 

 

Introduction

 

About twenty years ago such notions as Environmental monitoring”, “Risk assessment”, “Contamination managementandRisk management” were almost unusual not only in Russian but in English as well. It was due to the recently developed scientific, technical, economic and political related spheres of human activity which rapidly grew during the last 20 years. Mercury was recognized as one of the most dangerous pollutants only recently by international medical and environmental institutions. Earlier mercury was widely used in industry, agriculture, scientific researches and in household activity. Recognition of “mercury hazard” appeared due to the several anthropogenic environmental catastrophes in XX century. The most famous one is the mercury contamination of Minamata Bay in Japan which caused toxicological epidemic of a new severe disease called “Minamata disease”.

Japan is the only country in the world where the full-scale demercurization activities were accomplished. This activity has been implementing for almost 50 years and cost about $ 2 billions. Kazakhstan is among other few countries where full-scale demercurization works are in progress (in Pavlodar and Temirtau cities). Internationally accumulated experience proved such works to be extremely difficult and requiring the coordination of different interests of stakeholders’ groups and institutions.  Such projects are impossible to carry out by efforts of one organization and funding from one source. Environmental restoration projects are implemented by big team of specialists from different institutes (mainly by a consortium) and very often there are contradictory which have to be taking in consideration at compromise achievement. As a rule, such kind of projects is impossible to accomplish by the time fixed and define scope of activity and cost needed beforehand. Such projects are always phasic and require discussing intermediate results, monitoring and coordination of efforts to solve new tasks.

The project of Demercurization of chlor-alkali production in Pavlodar first phase of which was completed by 2005 is a good example of the aforementioned statements.  This paper focuses on the analysis of the Pavlodar project implementation; assesses the hardships and preliminary results.  Obtained experience is important for the new project of Nura River mercury contamination clean-up in Central Kazakhstan started in January 2004 by the World Bank.   

Authors of this paper took part in:

the field study in the Northern industrial zone of Pavlodar in 1993-1994,

- project INTAS Kz 95-19,

- discussions of BRGM (France) company proposals in 1999-2001,

- expeditions in the framework of «Toxicmanagement» project in 2001-2002,

- public hearing of “Toxicmanagement” outcomes in Pavlodar and Omsk (Russia) in 2002 - 2004,

- development of Terms of Reference for the correction of Demercurization Design worked out by  JV “Evrohim”, Kiev (JV Evrohim) in 1995.

- development of the Program for post-containment monitoring in the Northern industrial area of Pavlodar for 2005-2020,

- field studies for obtaining incoming data on demercurization works efficiency in 2004,

- including within the framework of the project NMP2-CT-2004-505561 "BIOMERCURY",

- calculation of mercury amount released into environment in the course of production process in the period of 1975-1994 (1310 tons),

- collection of historical data and documents concerning chlor-alkali production at Pavlodar Chemical Plant (PCP) and Demercurization program in Pavlodar,

- preparation and discussion of the Project Proposal with the experts of International Science and Technology Center (ISTC) in Pavlodar - in June 2004 and in Moscow – in September 2004, which currently approved for funding by US EPA as ISTC K-1240p project,

 - preparation of press-releases dated 15.11.2004 and 12.07.2006 on accomplishment of cut-off wall construction (pressreleases were based on this paper);

- post-demercurization monitoring works since 2005 to date including work in the framework of K-1240p ISTC project

 

1.   History of mercury electrolyses based chlor-alkali production at the Pavlodar Chemical Plant

 

1.1. General

    

The design statement for the construction of the Pavlodar Chemical Complex (later it was renamed as PCP, PO “Khimprom” Pavlodar, JSC “Khimprom”, JSC “PCP”, JSC “Kaustic”) was worked out in 1962 being based on the following documents: Decree of National Economy Supreme Committee of Council of Ministers of USSR #286-p /1/ dated November 29, 1963; Decrees of Central Committee of the Communist Party of Soviet Union and Council of Ministers of USSR #795 dated July 23, 1958; #85-30 dated January 20, 1960; #846-300 dated September 11, 1961 and also Decree of Council of Ministers of USSR #284 dated April 1, 1961. According to the design statement the projected capacity was planed as much as 120 thousand tons of caustic soda /2/, 90 thousand tons of liquid chlorine /1/. The construction of PCP started in 1965 and proceeded till 1992. For these years PCP has been managed by several directors who ran the production. They are: Ju.B.Yezhov (1965-1968) A.R.Bakhaev (1968-1973), A.C.Korpiakov (1973-1977), C.C.Berketov (1977-1988), B.A.Sharov (1988-1997), E.P. Sereniuk (1997-1998), A.G.Siryk (1998-2000).   

The first production – mechanical-repair department was commissioned in 1970, a nitrogen-oxygen plant - in 1972, production of aluminum chloride - in June 1973. According to the factory design it was planned to produce chemical weapon in the Site #2 which construction started simultaneously with Site #1 in 700 m to the east /3/.

 Location of PCP which is 9 km to the north of residential area of Pavlodar and 5 km to the east of the Irtysh River (fig.1) was chosen due to the number of reasons: proximity of electricity source – coal from open pit of Ekibastuz coal fields, fresh water, salt lakes and salt-works, developed transport infrastructure, climatic conditions for evaporation ponds operation and the construction of Pavlodar Oil-Refinery (POR) in the neighborhood where it was supposed to refine west-Siberian oil. In 1970s both these plants PCP and POR and also designed Albuminous-Vitamin Production as well as Plastic Mass Manufacturing Plant were called as a Pavlodar Oil-Chemistry Complex. It was planned that POR would provide PCP and other factories with hydrocarbons row material which would give an opportunity for PCP to utilize the excess of chlorine obtained while caustic soda production with electrolysis method. Construction of full scale design PCP and POR was not accomplished and Albuminous-Vitamin Production and Plastic Mass Manufacturing Plant haven’t even been started because of the USSR collapse.  In 1991 PCP covered the area of 2500 hectares (according to the design statement – 132 hectares /2/), and employees staff amounted 6500 people, including 500 engineers (in the design statement it is 8368 including 3271 in weapon production /2/). Additionally to the main production PCP had its own an agricultural farm, well developed social infrastructure and provided the city government with a significant assistance in civilian construction.

 

 

Fig.1. Northern industrial area of Pavlodar (satellite image): 1 – Irtysh River, 2 – residential area of the city, 3 – Industrial site #1 of PCP, 4 - Industrial site #2 of PCP, 5 – wastewater storage pondLake Balkyldak, 6 – mercury waste lagoons, 7 - Pavlodar Oil Refinery, 8 – power station TES-3, 9 – ash lagoon of power stations of TES-2 and TES-3, 10 – Pavlodarskoe village

 

At that time of planned soviet economy further development of PCP was restricted by a number of unfavorable factors such as delay in construction of oil-pipe line Omsk-Pavlodar-Chimkent-Tchardzhou and POR. The latter was caused by the construction in neighboring Russian oblast bigger Omsk Oil-Refinery. Other factors were: low quality of the halite materialbrine from Lake Maraldy which later was replaced with sodium chloride from Baskunchak salt-works in Volga region (Russia), and the lack of experienced force in new developing industrial region. PCP constantly faced the problem of chlorine excess resulting in frequent stoppage of the production. These factors brought the plant to the condition of high accident rate of chemical-technology processes, environment contamination with chlorine and mercury in the long run it influenced the destiny of the plant. Neither participation of PCP in All-Union Assosiation Soyuzorgsintez of the USSR Ministry of chemical industry which controlled the chemical weapon production nor being within the list of 100 defense industrial factories of the USSR which had priority in their construction, helped PCP to develop without crises /3/.

Industrial Site #1 consisted of 30 shops where wide range of products and commodities was manufactured such as caustic soda, chlorine, sodium hypo chloride, ammonium chloride, additives to lubricating oil and engine oils, floto-reagents, anti-freezes, anti-icer, disinfectants and bleaching agents, plasticizers for plastic mass production, phenol-formaldehyde resin, some types of plastic and plastic goods. These products were delivered to industrial plants of the whole Soviet Union, including Kazakhstan, Russia, Byelorussia, Uzbekistan and Kyrgyzstan. At Site #1 one of shops produced defense products – AlCl3 including one of high rate rectification starting since 1977. This product was used for production of missiles SS-20 fuel and thermo isolating coating for a space shuttle “Buran”/3/.

In 1993 after the termination of caustic and chlorine production which was the basic production of PCP only those shops survived that produced household chemical goods and commodity (for example shampoo based on a ginseng extract) and reagents for ore mining and processing and energy industries. Part of these productions was privatized in 1994 during establishment of JSC “Khimprom” at that they used their facilities on the condition of rent. 90% of JSC “Khimpromshares belonged to the state. The most standing idle equipment subject to any value were sold in order to pay to minimum working staff and to cover the debts. The exception was the defence equipment which were protected by Soviet-American non-proliferation treaty dated 1989, ratified later also by the Kazakhstan Government. However Kazakhstan did not include PCP into the list of the plants producing chemical weapon. Soon after closing of chlor-alkali production it became obvious that PCP will not be able to be kept as one indivisible technological complex. Meanwhile potential investors of new chlor-alkali production were scared about the presence of mercury hot spot in the Site #1 the elimination of which required additional overproduction cost. Therefore since mid-90s plant management and local government focussed on demercurization activity and search of funds. In late 1998 JSC “Khimpromstarted demolition of the most mercury contaminated structures in Shop 31 at the own and oblast budget cost in order to continue this work in 1999 at the cost of state budget. However after the demolition of roof and some walls of Shop 31 the funding was stopped and the next spring (April 1999) local government declared situation of emergency which was caused by threat of intensive evaporation of spilt mercury. This event attracted attention of mass media and environmental movement. Under their pressure the state government had to allocate money for collection of spilt mercury, dismantling of the equipment and part of the building 31. On 26.04.1999 JSCPCP” was segregated from JSCKhimpromso that it has opportunity to receive funds from the state budget and to conduct demercurization works in Shop 31.  However on completion of 1999 the funding was stopped again. Since 09.01.2001 JSCPCPwas assigned to communal property of Pavlodar oblast administration.

Demercurization works at the cost of republican budget were resumed by JSCPCPonly in early 2002. By 2005 the first Phase of demercurization project was accomplished. In 2006 JSCPCPwas proclaimed a bankrupt and its property was put for a bid while the territory where demericurization works were held was withdrawn from the bid lot and still is a communal property. New chlor-alkali production (with membrane method) will be revived by JSC “Kaustic” with private capital. JSC “Kaustik” was established in 2004 based on only private capital and had purchased the half of the property of PCP industrial site #1 by the beginning of 2006.     

 

1.2. Chlor-alkali production. History /4-8/

 

Production #3 manufactured chlorine and caustic soda (NaOH) since 1975 till 1993 by electrolysis method where mercury was used as a cathode. There were 80 electrolyzers (CDM 150-7.3) installed in shop #31 (in 1975 - 72 electrolyzers, in 1984 - additionally 8 electrolyzers, and after full repair in 1986 there were 68 electrolyzers totally). The capacity of production amounted 112700 ton of caustic soda and 100000 ton of chlorine per year. Raw materials sources: sodium chloride - from Baskunchak (Volgograd oblast, Russia), water – from the Irtysh River

Horizontal electrolyzer CDM 150-7.3 made in Germany (with maximal load of 150 kA, cathode current density of 7.3 kA/m2, length of 14.5 m, width of 2.03 m, number of anodes – 120) with mercury cathode (20.4 m2) and vertical amalgam decomposer (with diameter of 1.0 m in upper part and 1.44 m in lower part, height without fridge 2.07 m), produced gaseous chlorine and hydrogen as well as chlorides free aqueous solution of sodium hydroxide. Due to mercury the electrolysis of sodium chloride aqueous solution

 

2NaCl + 2H2O → 2NaOH + Cl2↑ + H2↑,                                                                                 

 

was divided into two electrochemical processes:

in the electrolyzer gaseous chlorine was generated on graphite anode and sodium amalgam  - on mercury cathode

 

2Na+ + 2Cl- + (Hg) →  2Na (Hg) + Cl2↑,

    

and in the decomposer both aqueous solution of sodium hydroxide and gaseous hydrogen were generated on the surface of a graphit extension as a result of interaction of sodium amalgam with water  

 

2Na (Hg) + 2H2O → (Hg) + 2NaOH + H2↑.

 

Technologically the process of sodium hydroxide production looked like a travel of depleted sodium amalgam (with sodium concentration ≤ 0.005%) from the lower part of the decomposer upward to the electrolyzer inlet with the help of mercury pump, followed by the saturation of amalgam with sodium under the current up to concentration  0.45 % during its move along sloping bottom of the electrolyzer, entering 0.45% of sodium amalgam from the electrolyzer in the upper part of decomposer and the formation of NaOH in the process of interaction of sodium with desalted water on the graphite extension at trickling of amalgam down along decomposer with lowering concentration from 0.45 to 0.005%. NaCl brine flowed forward with amalgam in the electrolyzer while NaOH solution contra flowed to amalgam in decomposer. Concentration of NaCl in brine at the electrolyzer inlet was 300-310 g/l, in anolyte outlet - 265-275 g/l (anolyte contained dissolved 0.3-0.5 g/l chlorine). Alkali solution concentration at the electrolyzer outlet was 43-46%.

Electrolysis brine was prepared with anolyte additional saturation in the Shop # 34a where it was stored in two horizontal rubberized tanks of 80 m3 each. From them brine drifted in Shop # 31. Anolyte entered in two titanium tanks of 40 m3 each and pumped out to Production # 2 for the following dechlorination and returned later to Shop 34a.

Solutions temperature in the electrolyzer reached 80-85оС, and in decomposer – 80-100оС. High temperature caused contamination with mercury of all electrolysis products and wastes: anolyte NaCl depleted solution, solution of alkali and hydrogen. Alkali was contaminated with elementary atomic-dispersed mercury; anolyte, chlorine and exhaust gases contained water dissolved mercuric chloride; hydrogen and output ventilation gases – gaseous mercury. In the long period of electrolyzers operation a lot of mercury was sludged with the formation of amalgam oil which was hand-removed regularly from electrolyzer’s accumulating pockets. For amalgam cleaning the accumulating pockets were rinsed with purified water.  

Alkali solution was cooled, separated from mercury and other admixtures by filtering through frame filters FP-50 and afterwards alkali was passed for either storage or being poured into tanks. Hydrogen was cooled to 20-25оС immediately above the decomposer so that the most condensable mercury returned in decomposer.  Afterwards hydrogen was cooled again to 15-20оС with the return of condensed mercury in electrolyzers, and mercury removal with chlorinated water took place. Remaining chlorine was absorbed from hydrogen with alkali solution (with NaOH concentration of 180-240 g/l), then purified hydrogen was rinsed with water, diluted with nitrogen and emitted into the air. Mercury content in emitted gases shouldn’t had exceeded 0.01 mg/m3. In winter period however hydrogen was emitted into air skipping purification stage. Received in electrolyzers chlorine-gas with concentration Cl2 ≥ 90% and admixture of H2  gas ≤ 1% was constantly pumped out in collector so that to maintain vacuum of 5-10 mm of a water column. Humid chlorine-gas was washed with recycle water (mainly for NaCl and Hg removal), cooled and dried off with concentrated sulphur acid in two parallel systems of cooling and drying. Then it was compressed and routed down to Building 36 of Shop # 4. Analyte prior to additional saturation with NaCl was dechlorinated by acidification and addition of sodium sulphide with following removal of sludge containing mercury sulphide, HgS using press-filter. Regulated content of mercuric chloride in anolyte at the cells outlets – 0.002%, while in purified brine at inlet – 0.001%. Exhaust gases generated by anolyte in drying and pumping section as well as chlorine-gas from the cells operating with low load have been pumped out to ejector to be neutralized. Chlorine and mercury have been absorbed with the solution of alkali with NaOH concentration of 180-240 g/l, which circulated through the ejector until alkali concentration dropped to  20 g/l. Purified exhaust gases were emitted into air. Ventilation gases were emitted in the air without treatment. All washing and absorbing solutions as well as mercury containing water were discharged into mercury sewage. Regulated norm of mercury containing wastewater at chlor-alkali production amounted 15 m3/day. Liquid mercury sludge was settled, mercury was returned in the cells. Not settled sludge was diluted with water in the tank where sludge was washed up with stirrer and metallic mercury regenerated for 3 hours. Regenerated mercury was returned in the cells and not settled sludge was subjected to thermal regeneration. Solid mercury sludge formed while anolyte purification process and containing mercury sulphide were routed to burial place in the west cell (#1) of evaporation ponds and sludge formed while alkali purification process and containing metallic mercury – to thermal regeneration.  Graphite from worked-out anodes, khlorin fabric and filter glass-fiber were also mercury bearing wastes. These wastes were buried at a special landfill for solid wastes. Electrolyzers underwent regular full repair in the mechanical repair shop where humin worn-out coating had been thermally annealed and replaced with new coating.      

Mercury that had been lost during the electrolyzers operation as a result of leakage and during repair was washed out with water from the electrolysis shop’s floor into the floor troughs and further into settling pits of mercury contaminated wastewater sewerage. Troughs and settling pits were periodically cleaned off using portable titanium vacuum tank one of connecting pipes of which was connected to vacuum line and another was connected to rubber hose with the help of which mercury was collected. Collected mercury returned to the electrolyzers. The floor of electrolysis shop was covered with special coating which was replaced several times for all time of its operation.   

The plant of mercury sludge thermal regeneration was launched in 1980 with capacity of 150 m3/year and reached the capacity as much as 48 m3/year. The plant consisted of 3 induction furnaces of periodic activity. Each furnace had four cylinder baskets with welded bottom.  Heavily contaminated sludge (4-15%) was mixed manually with sawdust and limestone in the ratio of 20:1:1 and loaded manually in the baskets. The baskets were placed in the furnaces with the vacuum rate of 0.2 kgc/cm2.  Heating was proceeded by stages for 14-15 hours till the maximal temperature 550-600оС. For mercury vapor condensation a vertical heat-exchanger with water casing and heat exchange area of 17 m2 were used. Exhaust was cleaned additionally either in adsorbers (there were 2 plants: operating one and reserve one) filled with the coal HPK-3P or in the vertical cylinder tanks with capacity of 2 m2 with a stir, bubbling it through 10-20% Na2S solution layer. Mercury bearing wastes from this plant represented cinder and sludge (buried in the evaporation ponds), wastewater (to be discharged into mercury wastes sewerage) and cleaned exhausts and ventilation gases (to be emitted in the air).   

Wastewater sulfide treatment was located in the buildings 40, 40a und 40b. This treatment plant was launched in 1975 simultaneously with chlor-alkali production. Treatment process consisted of pH correction of mercury bearing wastewater, settling of primary mercury sludge, mercury oxidizing up to Hg (II) by chlorine followed by removal of chlorine excess, second correction of pH and Hg (II) precipitation from solution with the help of sodium sulfide. Poorly soluble mercury sulfide (II) was settled with iron sulfate as a coagulant with following continuous settling of mercury sludge. Treated effluents were collected in the tank 40d of 5000 m3 capacity.  After filling 40d tank (fig.2) with wastewater they were discharged into the wastewater storage pond Balkyldak only if the sanitary laboratory found the mercury level there to be safe. 

 

 

Fig.2. Storage tank for mercury containing wastewater “40d”

 

There were some major technological drawbacks of sulfide method: low rate of mercury sulfide sediment formation, by-processes of soluble poly-sulfides formation and hardships of solid phase separation. Therefore mercury concentration in wastewater discharged from 40d tank in the wastewater storage pond did not meet the standards very often. Besides Production # 3 discharged illegally wastewater to the pond Balkyldak avoiding sulfide clean-up very often. It forced the management of PCP to reconstruct the system of wastewater collection and treatment. In 1978 sulfide based treatment plant was replaced with the facility based on the ion-exchange however it was operated not regularly. Achieved capacity reached 30 m3/hour. Wastewater were filtered, acidified to pH 1-3 and chlorinated in a chlorinator at active chlorine concentration of 0.1 – 0.8 g/l in the water for clarified water and up to 2 g/l concentration for non clarified water. Then chlorinated water was filtered again, de-chlorinated through adsorber filled with ARV charcoal of 2.5 m layer, filtered again and run through 4 adsorbers cascade filled with anion-exchange resin VP-1-AP. The resin and charcoal were loaded to the adsorbers from the top and unloaded from the bottom onto screen-tray while the wastewater went from the bottom upwards to be treated. Worked-out resin and charcoal went for regeneration and poor mercury sludge – to mercury factory. After adsorbers wastewater became subacid therefore it was neutralized with alkali up to рН 7 and discharged in the eastern part of the special evaporation ponds (#3). Approved limit of wastewater clean up was 0.005 mg/l. During the stoppage of anion–exchange treatment plant mercury bearing wastewater of chlor-alkali production were discharged in the evaporation ponds without treatment. 

Evaporation ponds – special engineering testing ponds - were constructed in 1976. Their design capacity was 200 m3/day or 73000 m3/year of mercury containing effluents. Evaporation ponds are located 1.5 km to the north of Site # 1 of PCP on the south shore of the pond Balkyldak. They consisted of 3 ponds of 344х200 m each,  with dam height – 3 m, mean depth of each pond  - 2 m, capacity 115000 m3 each and the total water surface – 18.3 hectares. Bottom of these ponds represents rolled ground covered with special screen. This screen consists of two layers of stabilized polyethylene film 0.2 mm thick and three sand layers 1 m of total thickness. According to the design two ponds were expected to be involved in the accumulation process and the third one as an emergency pond. However in the operating process mainly eastern pond (#3) was used as the evaporation pond, middle pond (#2) was used as an emergency and western one (#1) - as a solid wastes disposal (mainly for graphite and sludge from anolyte).

After the completion of special evaporation ponds construction and mercury sewage systems re-construction unapproved discharge of mercury contaminated wastewater from chlor-alkali production into the general PCP’s sewage systems going to the pond Balkyldak became technologically impossible. Communication between Production #3 and the whole plant was disconnected. The anion–exchange treatment plant was connected with the evaporation ponds via above-ground sewage system for mercury contaminated wastewater – pipes made of titanium.

Wastewater storage pond - Lake Balkyldak (fig.3) is located 5.5 km to the east from the Irtysh River flood-plane. According to the initial design of 1975 it had a designed capacity of 56.92 millionm3, the surface area of 15.9 km2, evaporation rate of 9.6 million m³ at critical level of 109.0 m and according to the design of 1985 after dams build-up it has designed capacity of 74.0 million m³, surface area of 18.0 km² and evaporation rate of 11.4 million. at critical level of 110.8 m. The territory of Lake Balkyldak was assigned to PCP for the construction of a storage pond-evaporator for the industrial wastewater discharge by Decree # 48p of Council of Ministers of KazSSR dated January 20, 1969. That time level of the water surface was at the mark of 105.11 m (25.10.1971). The operation of the wastewater storage pond was started in 1971 without any nature protection measures. Later the pond was confined by two fixed ground dams 8425 m long (eastern und western sides) and surrounded from north, west and east by the anti-filtration screen of “cut-off wall” type 0.6 m thick and 2.5-6.0 m deep. However in several depression sectors of cut-off wall was constructed either without pioneer dam or was not constructed at all. It brought to the penetration of the pond’s surface water along depressions in relief toward the villages Pavlodarskoye, Alekseyevka and resort Muyaldy up to 2-3 km long /9/.   Until 1975 it received wastewater of the whole North industrial zone of Pavlodar (PCP – 4.3 million m3/year, tractor manufacturing plant – 3.9 million m3/year, cardboard-ruberoid factory – 5.6 million m3/year and POR – 1.5 million m3/year and power plant TES-2 – 0.4 and power plant TES-3 -0.1 million m3/year, totally in 1998 - 13.31 million m3/year /10/). Later it was assigned to PCP but had to receive seasonal run-off and drainage water of joint ash lagoon of power plants TES-2 and TES-3 (this ash lagoon still represents the main source of the pond Balkyldak recharge with groundwater) along with PCP own wastewater. But actually in 1988 the volume of PCP discharged water into the pond amounted 6-8 thousand m³/day, tractor manufacture’s – 2.0 thousand m³/day, TES-2 and TES-3 – 2.0 thousand m³/day (mean daily data) with limit of 5 thousand m³/day approved by the Pavlodar oblast government in 1986 /9/. The maximal level of water in the pond Balkyldak was reported to be 110.95 m on 18.05.1994.

Approved load of metal mercury for one electrolyzer was 2750 kg, i.e. totally there was 220 ton of mercury in electrolyses cells. According to data /11/ since 1975 till 1989 for 14 years of production 685525 ton of caustic soda was produced with 1089.356 ton mercury used.

 

 

Fig.3. South shore of wastewater storage pond Balkyldak

  

Table 1. Production of caustic soda and actual volume of mercury used at PCP /11/

    

Year

Production of 100%

NaOH, t/year

Specific mercury consumption,  kg/t NaOH

Mercury consumption per year, t

1975

17775

1.29

22.930

1976

9575

2.09

20.011

1977

28285

5.05

142.839

1978

36600

1.4

51.240

1979

43082

2.6

112.013

1980

42363

1.86

78.795

1981

59338

1.504

89.334

1982

48935

1.296

63.420

1983

55510

1.485

82.432

1984

66600

1.3

86.580

1985

57464

1.743

100.160

1986

38234

2.6

99.408

1987

57954

0.838

48.565

1988

61060

0.74

45.184

1989

62750

0.74

46.435

Totally, t

685525

Average 1.589

1089.356

 

Actual specific mercury consumption was as much as 1.589 kg/t, while “scientifically justified norms” required the consumption of 0.3 kg/t, "technically justified norms" – 0.5 kg/t, and “designed norms” – 0.76 kg/t.

The balance of major mercury technical losses was following: 0.8% of the losses fell at sludge accumulated and treated during production process; up to 1.9% - vent emissions, up to 2.6% - sludge sent to mercury factory, up to 3.9% - atmospheric emissions with hydrogen, up to 11.8% - wastewater and solid sludge transported to the ponds for solid and liquid mercury wastes, up to 83.7% - unaccounted losses. The latter were caused by spills and leakage of metallic mercury and its not full collection during operation and repair of the electrolyzers.

According to the messages of the former PCP managers /12-13/ it is evident that in 1990-1993 (last period of chlor-alkali production) about 200000 tons of caustic soda was produced and more then 175 tons of mercury was utilized. Totally about 2.6% of used mercury was sent for treatment as sludge /11/, i.e. 33 tons. Former the plant managers also informed /12-13/, that after chlorine production stoppage and the following building and equipment dismantling (Shop # 31) about 140 tons of metallic mercury was either poured out of equipment, collected from floors or thermally extracted from sludge and sent to a mercury factory. Thus the total loss of mercury during the whole chlor-alkali production process can be estimated as high as 1310 tons, 1100 tons of which were unaccounted losses accumulated in the concrete floor and grounds under the Shop # 31 and its proximity. Chemically aggressive medium there caused quick deterioration of the equipment of the chlor-alkali production. Electrolyses shop had a higher then common accident rate because at the period of chlorine overproduction and filling of all existing tanks with this gas the electrolyzers were either de-energized or transferred to a lower current load. This adversely affected electrolyzers’ technical status.

In 1986 Production #3 of PCP underwent a scheduled capital repair. In 1988 Program of conversion of technology based on mercury method which was used at electrolysis plants into membrane technology was accepted in the USSR (in 1994 this program was stopped due to the Soviet Union collapse). Since 1990 the construction of new membrane electrolysis shop was started at PCP near the building # 34. That shop was expected to replace Shop # 31.

Main infrastructure of the Production #3 was supposed to be kept as it was. The construction of the new shop distracted the funds from the current repair and reconstruction of building # 31. Unsatisfactory technical condition of chlor-alkali production resulted in the Resolution of the USSR chief sanitary doctor “On a ban of chlor-alkali production at Pavlodar plant “Khimprom” № 89-35 dated 12.07.89.  However the production of chlorine and alkali was intermittently continued and lasted for some more years.

 Production #3 was finally stopped after the USSR collapse by the resolution of Plant director B. Sharov /13/ in August 1993 after it was found out that the building #3 roof began destroying because of corrosion and some components of building structures started falling down into the hall of the electrolysis plant. In January 1994 Ministry Cabinet of the Republic of Kazakhstan issued a Decree № 7 "On measures for improvement of environmental and sanitary situation in Pavlodar industrial region” that gave up any hopes for the revival of chlor-alkali production based on the mercury electrolysis. This Decree allowed the equipment and materials which were not used in the production any more to be sold out. Disassembling of expensive equipment and structures made of non-ferrous metals took place in 1994-1995.

The following years PCP management and local authorities were attempting to revive chlor-alkali production in Pavlodar on the base of progressive membrane technology.

Table 2 and fig. 4 give data /14/ proving economic advantages of membrane technology versus mercury and diaphragm based one. However the main advantage of membrane technology versus mercury one is the significantly low risk of environmental pollution.  

In 2004 in the former PCP territory new JSC “Kaustik” was established which at present carries on talks with foreign companies on the procurement of western technology and equipment for creation of new membrane based chlor-alkali production.

 

Table 2. Comparison of Electricity Consumption for Each Technology /14/

 

 
 
MERCURY

 

 

DIAPHRAGM
 
MEMBRANE
Current Consumption
(DC kWh/ton NaOH)
3000 - 3500
2300 - 2400
2200 - 2300
NaCl contents in
Product NaOH (50wt.%)
low
(30 ppm)
high
(0.5-1%)
low
(20 - 50 ppm)
Oxygen contents in Clorine
low
(0.1- 0.3%)
high
(2 - 3%)
low
(0.5 - 1.5%)

 

 

 

Fig.4. Consumption of Total Energy of each technology at chlor-alkali production /14/

 

1.3. Military history of the plant and its conversion /3/

 

The Program of chemical weapons development and stockpiling in the USSR was focused on construction and operating of plants network under the All-Union Association Soyuzorgsyntez in the Ministry of chemical industry of the USSR. Those plants manufactured different war products. Most of those productions were located in Russia but a few facilities existed in other Soviet republics.  

PCP was one of such plants which in peace time produced both civilian products and dual-purpose products (caustic soda, Cl2, AlCl3, PCl3 etc.,) which could be used both for chemical and other kinds of weapon. PCP was the last of big chemical plants to be constructed and in case of emergency it can be converted easily into only military production manufacturing mostly binary nerve agents which were developed in the Soviet Union in the 1980s.

Although PCP manufactured precursor chemicals for chemical weapon agents, it has never produced chemical weapon. Since the early 1980s the construction of Site #2 went very quickly where since 1990 production of phosphorus trichloride – initial material for organic synthesis of nerve agents was started. Many specialists experienced in chemical weapon production were sent to the plant that time. However the construction of technological lines for weapon manufacturing was not accomplished. In 1987 the USSR ratified the Convention on chemical weapon ban and the USSR Government stopped the Program of chemical weapons.  

Site #2 was located at separated paled area of 550 hectares in the eastern part of the plant and was designed only for chemical weapon production. It had more strict security and secrecy system than PCP itself and consisted of 5 buildings including main chemical production lines, laboratory plants and equipment for war-sells filling with the chemical agents.  By the order of Mikhail Gorbachev, President of USSR construction of the weapon production lines at PCP was not only stopped but dismantling of already installed equipment and buildings was undertaken. Part of the equipment was converted to produce civilian goods.   

The production process at Site #2 started with manufacturing phosphorus trichloride. Yellow phosphorus produced in southern Kazakhstan and chlorine produced at Site #1 were used as initial components for the synthesis of phosphorus trichloride.  The plant designed for manufacturing intermediate products was situated next to phosphorus trichloride production building.  This plant was equipped with corrosion-resistant chemical reactors lined with silver or made of high-nickel steel (Hast-alloy). The next buildings in line were the main plant for manufacturing the chemical agents and laboratory buildings for testing them on laboratory animals.  Construction of these buildings has never been completed. The last building in line which was destroyed in 1987 was designed for operation with super toxic substances themselves. The air intake pipe of underground ventilation system was destroyed as well. Located across from and parallel to the main production building it was a site for war-sells filling with chemical agents. That building had four-meter thick walls reinforced with 16 internal columns to keep the walls in case of explosions. The plan was to build special tunnels connecting this building with the final chemical agent production building nearby. Other buildings at the site included tanks for storage of chlorine, support facilities and an incinerator for the elimination of chemical wastes.

 

Table 3. Converted production facilities at PCP Site #2 /3/

  

Buildings and their functions in the production cycle until 1987

Buildings’ status in conversion period from 1987 to 1992

Status as of June 1999

PCl3 production

Civilian-use PCl3 production

Civilian-use PCl3 production

Production of intermediate products for chemical weapon

Production of civilian-use substances: folitol, gidrel and acrylates in silver-lined reactors

Production of civilian-use mineral inhibitors in Hast-alloy reactors  

Chemical agent production

Not completed

Not in use

Laboratory buildings

Not completed

Sold to a tannery

War-shells filling

Used for production of polyvinylchloride (PVC) pipes 

Sold to Kazenergokabel, a wire production company

Laboratory for work with super toxic substances

Completely destroyed in 1987

 

Service facility

Motor oil production

Sold to Lyubol, Kazakhstani-Swiss joint venture 

Incinerator for the elimination of  chemical wastes

In use

In use

 

2. Program of demercurization of chlor-alkali production at Pavlodar Chemical Plant

 

2.1. Experience of demercurization of chemical industries in the USSR in 1980s /15/

    

In 1981 the chlor-alkali production at JV “Khimprom”, Sumgait, the Republic of Azerbaidzhan (currently it is surface-active material manufacturing plant) was shut down for reconstruction. Production shop was equipped with mercury electrolyzers CDM 50 with total capacity of 80 thousand tons of caustic soda per year. The production has been under operation for 25 years.  A new electrolysis building was constructed 15 m far from the old one. Although it was equipped with the more advanced mercury electrolyzers CDM 100 its capacity was the same. It allowed the old chlor-alkali infrastructure to be kept.

There was no any special demercurization activity there. Mercury was poured out electrolyzers and other equipment and utilized in new production. Demercurization of the equipment was conducted by mechanical treatment of metal constructions and their rinsing with water followed by their sending to metallurgical works for remelting. Concrete building structures of the electrolysis factory were dismantled for a year and used by population in private construction.  Sludge and debris rich in mercury was sent to Nikitovskiy Mercury Combine in Ukraine while wastes poor in mercury were sent to a landfill. For some time the floor of electrolysis factory was in the open air and mercury “sweated” out of the concrete. It was periodically mechanically collected. Later the floor was crashed and together with ground dug down to the depth of 2 m buried at the landfill. At present at the site of the old electrolyses factory there is a foundation pit where concrete columns of the building foundation were left.   

In 1987-88 the old chlor-alkali production was closed down at PO “Kaustik”, Sterlitamak, Russia. Its productive capacity amounted 80 thousand tons of caustic soda per year. New chlor-alkali production with mercury cathode was of double capacity and was constructed 5-6 years before the old production shutdown. It was located significantly far from the old one. JV “Evrohim”, Kiev (JV Evrohim) developed the project of facility dismantling and demercurization of production buildings. Employees of the closed factory participated in demercurization activity which lasted a year. Not only equipment of electrolysis factory but also all ancillary technological facility of chlor-alkali production were dismantled and utilized.  Besides mercury poured off the electrolyzers additionally about 140 tons of mercury was collected. Mercury sludge, debris and crashed floor of electrolysis shop were sent to Nikitovka Mercury Combine in Ukraine. Ground was not excavated as the building of electrolysis factory was constructed on the thick clay lens. Structures of large dimensions were buried in the landfill of I class hazard. Buildings of chlor-alkali production were kept as they were, including the electrolyses factory.   

Dismantling of equipment of the old chlor-alkali production took place under the pressure of local mass media and NGOs requiring precaution measures to be taken because PO “Kaustik” is located within the residential area.  

 

2.2. Researches taken by JV “Evrohim”, Kiev and Pavlodar Hydro-geological Expedition at Pavlodar Chemical Plant site /11, 16-20/

 

Engineering survey was carried out in compliance with the following documents: “Measures on solution findings of environmental rehabilitation of the territories contaminated with mercury to be taken during the shutdown of mercury electrolysis based production and its replacement with membrane technology in Pavlodar PO “Khimprom” approved by USSR Ministry of Chemical Industry dated 31.12.88 and the Decree № 89-35 of USSR Chief sanitary doctor “On ban of chlor-alkali production at Pavlodar PO “Khimprom” dated 12.07.89.

Pavlodar Hydrogeological Expedition – Science and Technology Centre “Technolog” (PHH) being a sub-contractor of JV Evrohim carried out the following fieldwork in 1989-1990: 32 test and observation boreholes on 8 profiles and also 19 additional boreholes located beyond these profiles were investigated around the shops # 31. Such amount of boreholes allowed hydro-geological conditions to be determined which chlor-alkali production left behind after its shutdown as well as rate of contamination in the west part of industrial site #1, including the main source of contamination – hall of mercury electrolysis. A half of these boreholes was drilled through the first aquifers and perched groundwater to the depth of 10 m.  Other 16 boreholes were drilled to the second horizon of Pavlodar suite located in the depth of 6.0-13.5m.  10 boreholes reached the bottom (third) horizon of 11-20 m.  Drilling 47 boreholes with intervals of 25-50 cm core samples was taken and water samples were taken from the aquifers for their analysis for mercury. In the hall of mercury electrolysis and in the building of mercury sludge treatment 11 pits and wells of 0.75-3.0 m deep were dug.

102 soil samples were taken from the depth of 0.25-0.3 m using a hand drill to determine the borders of contamination in the Site #1. Samples were taken also on profiles along transport roads with grid size of 40-45 m and in the area of Production #3.

Mercury concentration in water and soil samples was determined with atomic-absorption method in the laboratories of “Ecohydrokhimgeo” (Almaty) and JV Evrohim.

The main results of balance and hydrological study of chlor-alkali production of PCP were:

- estimated mass of mercury lost since 1975  till 1989 during the operation of chlor-alkali production is 1089 tons including 14 - 63 tons with hydrogen and vent exhausts,

- deposited in floor and grounds under the electrolysis factory – 813- 866 tons,

- dispersed in the area adjacent to the Production #3, along the roads, place for storage of wastes and contaminated equipment - 42-45 tons,  

- main hot spot of mercury contamination is located within the territory of electrolysis shop 31 and has an area of 7519 m2, where about 1131.8 tons of mercury is contained in 22 thousand м3 of contaminated material including concrete floor of electrolysis factory – 104.1 tons, suspension grounds – 859.1 tons, bottom clays – 6.4 tons. Depth of metal mercury penetration exceeds 3 m. However main amount of mercury (about 99%) is accumulated on the surface of undisturbed ground which is not deeper than 2 m from the floor;

- area of mercury contaminated soils in the Site #1 is as much as 521150 m2. The most contaminated sector is located eastward of Shop 31. Average concentration of mercury in the topsoil of 0-0.25 m deep in the contaminated area reaches 2-14 mg/kg. Total amount of mercury dispersed in the topsoil of 0-0.25 m deep is about 2.8 tons, total amount of contaminated ground here is about 208000 tons. Mercury penetrates down to depth of 4 m. However in the depth of 1.5 m mercury concentration does not exceed maximal permissible concentration for soils (MPCs - 2.1mg/kg). Calculated amount of mercury for the layer of 0-4 m (excluding mercury under the Shop 31) is 10 tons.

 - plume of groundwater mercury contamination spreads from Shop 31 west-northwest direction up to 800 m. Total area of groundwater mercury contamination in upper layers is 0.55 km2. The volume of contaminated water of all horizons was estimated as 2.08 million m3, which could contain about 10.0 tons of mercury (with concentration of 12.5 – 103.0 mg/l and mineralization of 62-72 g/l) in the form of soluble mercury (II) chloride.

- in two cells (#1, 2) of evaporation ponds there are mercury containing sludge from anolyte clean up. Mercury there represents sparingly soluble mercury sulfide. Mercury contents in this sludge ranges from 0.01 to 0.33%.  Totally evaporation ponds accumulated 140 tons of mercury salts;

-  in water of the cell for liquid wastes of the special evaporation pond – from 1 to 2 tons of dissolved mercury;

- pond Balkyldak received mercury with wastewater discharge. Average mercury concentration in the surface water of the pond reaches 0.01 mg/l, that is 20 times higher then MPCw. Taking in account the total volume of wastewater legally discharged to Balkyldak and mercury concentration in these wastewater one can estimate the total amount of mercury in water and bottom sediments. It is equal to 10-15 tons;

- hydrogeological forecast of the further mercury underground spread from PCP showed the following rate of mercury movement: in perched groundwater and the first aquifer - 20-46.7 m/year, in the second aquifer - 12-28 m/year and in the third one - 46-56 m/year.

 

2.3. Demercurization Design of JV Evrohim /21-25/

 

The development of the project was carried out in 1988 – 1995 and coincided with the USSR collapse and years of economical and political crisis. In this period huge Institute KNIIF GOSNIICHLORPROEKT was reorganized into KNIF MNPO “Sintez”, then into KNII “Sinteko”, which in turn gave life to a small company JV Evrohim while PCP was brought to the verge of bankruptcy. However PCP funded the project development mainly from its budget.   

Priority program of demercurization developed by JV Evrohim as a result of the study of 1988-1992 lay in the dismantling of the most contaminated parts of the Shop 31 - electrolyses hall (80 electrolyzers, other mercury bearing equipment, walls, floor slabs, etc…), washing the dismantled structures at the place and their sorting out. Metallic equipment after their treatment with oxidants (sodium hypo chloride, hydrogen peroxide, potassium permanganate, nitric acid, ferrous trichloride) and water and had to be utilized as a scrap metal, building structures with less then 1% of mercury – to be put in the specially constructed landfill (a pit of 3 m deep bottom of which was lined with clay screen of 0.5 m thick and with potential to be increased) and filled up with liquid cement. The building structures of more then 1% of mercury content had to be temporarily stored in the area of 1500 m2 and covered with clay. The most contaminated materials had to be collected in containers and to wait for their treatment. Other less contaminated parts of the Shop 31 were supposed to be dismantled later.

Main process of mercury recovery was expected to be carried out with the use of plants of thermal demercurization of concrete and mechanical demercurization of ground. At that concrete and ground after recovery of the most amount of mercury from them also had to be placed to the new sections of the landfill and filled up with ground-concrete mixture.

Concrete debris from the floor of the electrolysis hall of 20х30 cm size with mercury concentration of 0.3-0.5% had to be treated in the vacuum chamber electrical furnace of periodic operation under 700-750оС temperature for 2 hours.

It was planned to cool the air containing mercury vapor in an air condenser with additional water cooling. Metallic mercury had to be periodically poured into hermetically sealed containers while the cooled air to undergo additional treatment with adsorbent HPR-3p (activated charcoal soaked with ferrous trichloride), and then to be emitted in the air through 10 m high chimney.

Grounds with mercury concentration more then 1% had to be cleaned from mercury by preparing the pulp and its screening at the scrubber equipped with a trommel. The pulp poor with mercury which was obtained as a result of this operation was partly dehydrated and sent for ground-concrete mixture preparation and filling up the landfill with help of a pump.

Grounds with concentration less 0.3% (close to Shop 31) and less 0.02% (close to Shops 31a and 37) had to be excavated from the depth down to 0.25 m and used for ground-concrete mixture preparation with no preliminary treatment.

Ground-concrete consisted of (per 1 m 3 mixture): ground – 1800 kg, Portland cement (Н 400) – 95 kg, water – 300 kg (totally 2195 kg). Design toughness of concrete – 1.5 MPa. Prepared ground- concrete mixture had to be brought to the landfill with help of tracks.

The landfill for mercury wastes had to consist of sections (not less then 3 ones) and to have capacity up to 33300 m3.  The landfill should be covered with clay and asphalt screens from the top on which industrial facilities could be located in the future. 

Rate of mercury recovery: at ignition – 95, at screening - 85%, maximal mercury concentration in the buried concrete – less 3.5%.

 In 1995-1998 PCP conducted procedures discussion and approval of all the documents related to the Demercurization works with all appropriate authorities including Ministry of Environment and Bio-Recourses of the Republic of Kazakhstan (Decree # 3-2-137/1718 dated 11.08.95).

In 1996 JV Evrohim’s design was supplemented with Feasibility Study on dismantling and demercurization of the Electrolysis Shop.  

 

2.4. Proposal of Japan Consulting Institute /14/

 

During his visit to Japan in 1993 the President N. Nazarbayev had negotiation with Japan Government on participation of Japanese companies in elimination of mercury contamination in Pavlodar and construction of new chlor-alkali production based on membrane method. On the instruction of Japanese government Consulting Institute gave consultancy for JV Evrohim and conducted their own study of the problem. The tasks of the study were as follows: 

- elaboration of recommendations for appropriate technology of caustic soda and chlorine production; 

- study of the stopped production with respect to maximal use of existing facilities and minimal investment of additional funds;

- caustic soda, chlorine and hydrochloric acid market research to determine the adequate capacity of the plant;

- development of recommendations for more efficient project implementation;

- financial and economic analyses of the project implementation and providing results of the estimation.

The plan of the production conversion was developed based on both replacement of electrolysis thechnology of chlorine and caustic soda production by membrane one and allocation of new membrane electrolysis units together with the most part of old equipment in new building. The plan of works proposed by JV Evrohim was accepted as a basic plan of demercurisation. It was expected that the funding for demercurization activity would come from the soft loan provided by the Japanese Government. For this deal PCP had to get the guarantees of Government if the Republic of Kazakhstan, however such guarantees have never been received. Thus the negotiation came to an end with no success.       

 

2.5. Participation of BRGM Company (France)

 

In 1999 the Minister of Mineral Resources and Environmental Protection of the Republic of Kazakhstan visited France. During his visit he held the meeting with French companies interested in demercurization activity in Pavlodar. These activities lay in the provision of soft loan from French government, technical support and participation of French firms and technologies in the project implementation. BRGM – is a French national company dealing with ore deposits mining and wastes disposal - started cooperation with Ministry of National Resources and Environmental Protection of the Republic of Kazakhstan (MNREP RK) and PCP in elimination of the mercury pollution.   As a result of the first mission of BRGM “Contamination spread prevention program” was submitted to the Minister S. Daukeev, which was approved on August 3, 1999. /26/.

In compliance with the original proposals of BRGM remediation of the mercury contamination in Pavlodar was supposed to consist of four phases. Phase “A” lying in 10-day mission of French experts implied familiarization with the problem, technical aspects discussing and data collection. Along with it the proposal for World Bank to fund the Phase “B” had to be prepared. Phase “B” lay in assistance in burial of mercury containing wastes of PCP (i.e. in fact in conducting initial stage of JV Evrohim design). Indicative budget of this Phase amounted $2 million, $0.4 million of which had to be covered by French party and $1.6 millions – by Kazakhstan party (or through a World Bank loan). Phase “C” consisted in remediation of contaminated area in the north suburb of Pavlodar to an acceptable level according to the project which had to be elaborated by BRGM during the Phase “B”. Indicative budget was $4 millions and had to be covered with the soft loan of French Government. Phase “D” had to provide for absolute safety of Pavlodar region from the mercury contamination at the cost of World Bank loan. 

Next variant, “Demercurization project in Pavlodar: Environmental Impact Assessment and contamination hot spots elimination” was proposed by BRGM six months later /27/ and had three phases: Phase I – works on ensuring safety of concrete floor in Shop 31 (with durability of 2 months and cost of $0.3 millions of French Government soft loan); Phase II (consisted of two parallel components at the expense of French Government soft loan): component A – assessment of the pollution scale and health risk for population in Pavlodar (duration –18 months, estimate budget - $4 millions), component B – demercurization of 1500 m3 of wastes with high mercury concentration on mobile thermal plant (duration - 18-24 months, estimate budget - $4 millions); Phase III – had to ensure integrated control over the situation and had to be determined on the base of Phases I and II results. During the visit of President of the Republic of Kazakhstan N. Nazarbaev to France in June 2000 these proposals were approved and in September 2000 a protocol on soft loan (€8.2 millions) to be provided by the French Government was signed. According to that protocol the yearly interest rate amounted 2.1% for 16 years period including 6 years on preferential terms and the next ten years the pay-outs had to be paid off by 20 equal parts /28/. 

Nevertheless the protocol stipulated denial of JV Evrohim design as in compliance with the loan terms “…local expenses, services and equipment made not in France, should not exceed 10% of the whole loan…”/29/. Accordingly BRGM offered to MNREP RK to review the JV Evrohim design (including cancellation of landfill construction for materials with mercury concentration less than 0.3%, cut-off wall construction and mercury washing out of heavily contaminated grounds as well) and to divide the demercurization activities into three stages:

i – dismantle chlor-alkali facility, wastes sorting and burial in the temporary storage,

ii – reduce mercury concentration in grounds and soils to the maximum permissible level through their thermal treatment,

iii – ensuring the full safety of Pavlodar region from the mercury pollution.

PCP administration as well as the local authorities didn’t accept the proposal to abandon JV Evrohim design completely. It was suggested that BRGM should develop Feasibility Study (FS) of their proposal /30/ for its further consideration as an alternative project to JV Evrohim’s one. BRGM developed the project FS “Demercurization and elimination of mercury source of contamination in Pavlodar” /31/ and submitted it to MNREP RK at the end of December, 2000.

FS suggested conducting:

-                 Collection of additional data on soil-ground characteristics at the Site #1 and on bottom sediments in the special evaporation ponds and the pond Balkyldak;

-                 assessment of water quality in the river Irtysh, groundwater and air quality;

-                 simulation of mercury migration with both groundwater and surface water as well as with the air which should be done to assess the risk posed to population;

-                 technical and economic assessment of efficiency of different technologies of cleaning from mercury;

-                 technical solutions developments on the site rehabilitation to be funded by World Bank;

-                 temporary encapsulation of concrete floor of Building 31;

-                 thermal treatment of 1500 m3 most contaminated materials in a vacuum furnace;

-                 construction of anti-filtration screen – cut-off wall around Building 31.

FS also suggested approximate distribution of the loan funds (8.2 million Euros) as follow:

- technology and equipment purchase and personnel training - 50%,

- data collection and analyses, risk assessment ­- 25%,

- demercurization, rehabilitation works at industrial site and construction of cut-off wall - 25% .

After the comparison of JV Evrohim and BRGM proposals /31/ it was evident that BRGM technology does not drastically differ from JV Evrohim proposal however the cost of BRGM project was much higher then that of JV Evrohim. For example, the method of mercury recovery according to BRGM 20 times more expensive than that of JV Evrohim. In compliance with the BRGM proposal Kazakhstan had to get confirmation of already proven mercury thread and risks, conservation of the situation and recommendation for its liquidation for 8.2 millions Euros. Complete demercurization by BRGM was estimated as high as $ 80-130 million, while JV Evrohim design suggested the elimination of the source of mercury contamination for $ 6.5 million. It was recognized that “…BRGM project is a research one and does not solve the tasks of elimination of the source of mercury contamination put by the President and Government of the Republic of Kazakhstan, what was recognized by the authors of the FS…” /32/.

Comparison of JV Evrohim and BRGM designs gave reasons to Kazakhstan to insist on urgent implementation of JV Evrohim design at the expense of French Government loan with no any changes which would cause the delay in elimination of emergency situation. The negotiation lasted until the end of 2001 with no results.

 

2.6. Demercurization activity in 1998-1999

 

Due to environmental emergency situation at PCP the head of oblast administration D. Akhmetov immediately after approving JV Evrohim design by MNREP in 1995 asked for The Republican authority to fund the demercurization activity. It was expected that the funding in 1996 would be provided by the Environmental Fund and national budget but the Ministry of Finance reject the funding due to the budget deficit (Letter to the RK Government of 07.03.96 №18-2-3/1644) and suggested using the debt capital from foreign investors and other stake-holders interested in production of caustic soda by non mercury method. Committee on Emergency showed no support to The head of Pavlodar administration either and the problem of funding was deferred until 1998.  However PCP used its own budget 18.53 million tenge and  6.7 million tenge of oblast Environmental Fund for certain works such as JV Evrohim design expertise, partial dismantle of Building 31, etc..) /33/.

Decision to allocate funds from the National budget (246 millions tenge in 1998, 373,4189 million tenge in 1999, 262,8295 million tenge in 2000, total: 882,2464 million tenge) /33/ was managed to receive only after the project of demercurization was separated from the project of construction of new production (Protocol of meeting at Deputy Prime-Minister № 20-11/9195 of 15.08.1997). A considerable pressure to take the decision to open the funding for demercurization activity was rendered by the Russian Federation Government: in 1998 in Moscow the RK Ambassador discussed with the RF Government the thread of mercury contamination of the transboundary Irtysh River, and on 10.04.98 the Protocol on Agreement between Pavlodar and Omsk administrations related to the measures to be taken to localize and eliminate the mercury hot spots /34/ was signed.

In 1998 five years later after the production stoppage dismantling of Building 31 (Fig.5-6) and wastes burial was started. These works were funded from local budget because the national budget could provide 9.3 million tenge for the first year /33/. Dismantling of electrolyses shop was scheduled for winter 1998-1999 because mechanical collection of mercury is safer under the cold temperature (mercury vapor concentration inside the Building 31 in August 1998 was measured as high as 1.03-1.68 mg/m3, i.e. more then 100 MPCw.a. /35/). In November 1998 3993 kg of mercury was manually collected /36/ and in December the dismantling of roof, carcass, walls and floor slabs (Fig.7-8) and the disassembling of the production equipment in the Shop # 31 were started. At that during the dismantling more than 15 tons mercury was spilt /37/. Since the budget funding in 1999 was not opened yet, the works were carried out very slowly and finally also came to a stop. It worried a lot local environmental NGOs which for example held a picket of RK Parliament on 03.03.99 to attract the attention to the Mercury problem in Pavlodar. With spring come the intensive mercury vapors emission from the floors of the electrolysis hall started. By the decision of Pavlodar mayor, N. Chmykh №17 dated 02.04.1999 the territory of PCP was declared as a zone of emergency since 05.04 through 30.05. It drew the attention of public and mass media as well as national TV channels. The works on demercurization were intensified however the funding allocated for the emergency situation elimination was enough only for the mercury collection (17 ton /38/), dismantling and decontamination of equipment (electrolysers and metal constructions with obvious mercury contamination were washed up with high pressure water shower and then buried in the landfill /39/, 72 amalgam decomposers together with remaining mercury and graphite were transported to the cell #1 of special evaporation ponds /39, 40/ and buried there), dismantling the electrolysis hall of the Shop #1 and construction of the first section of the landfill. In late 1999 RK Prime Minister K.K. Tokayev visited Pavlodar oblast and after his visit the Plan of decontamination measures for PCP was developed and approved according to which in 2000-2002 the funding of $12.0 million had to be provided including $9.2 million from external loan and $2.8 million from the National budget. /42/. However the money received in 2000-2001 were enough only to support the infrastructure of PCP (Table 4). New stage of funding for the demercurization was provided only in 2002.

 

Table 4. Cost of demercurization works at chlor-alkali production in Pavlodar in 1996-2001. (established prices) /43/

 

Funding sources

1996

1997

1998

1999

2000

2001

Total

National budget

-

2.0

9.3

80.0

30.0

-

121.3

Oblast budget

0.4

0.6

26.5

10.7

13.3

16.5

68.0

Own PCP funds

17.3

5.0

4.4

6.9

-

-

33.6

Total in the year:

17.7

7.6

40.2

97.6

43.3

16.5

222.9

 

3. Assessment of mercury contamination extend in Pavlodar held by Kazakhstani research institutes in 80-90s

 

Mercury contamination study held regularly since early 80s were initiated by the public being worried with the high probability of contamination hotspot occurrence which was out of control, as local authority had no power to control defense industry. This concern was backed up with significant chlorine emissions from the plant reaching the residential area. 

All those researches had limited funding and as a rule didn’t covered territories adjacent to the plant due to the secret regime at the plant. Those researches showed the extent of mercury contamination of soils in 90s didn’t go beyond limits of the plant territory whilst surface water contamination was limited with the wastewater storage pond Balkyldak.

 

 

Fig.5. Building 31 – electrolysis shop (northern side) before demolishing the building, winter 1998/99.

 

 

Fig.6. Building 31 – electrolysis shop (southern side) before demolishing the building, winter 1998/99.

 

 

Fig.7. Building 31 – electrolysis shop (northern side) after dismantling the roof, winter 1998/99.

 

 

Fig.8. Building 31 – electrolysis shop (northern side) after dismantling the roof, winter 1998/99.

 

3.1. Researches related to groundwater and surface water protection /44-46/

 

Ministry of Geology of Kazakhstan Republic assigned PHH to conduct the groundwater contamination monitoring in Pavlodat oblast starting since 1981. Within the research surface and groundwater in the north industrial zone of Pavlodar were studied with respect to mercury contamination. For this purpose they used a 40-monitoring boreholes grid located to the north of Site #1 and around the pond Balkyldak.

It was reported that after 1985 shoreline in the pond Balkyldak was constantly higher than 110 m (in 1988 its level reached up to 110.23 m, and in 1994 up to 110.95 m), that complies with water surface area exceeding 25 km2 and water volume of 80 million m3. At the beginning of the pond operation it received a substantial volume of mercury contaminated wastewater which was settled on the bottom giving maximal mercury concentration 1.2 g/kg in bottom sediments. In certain periods mercury concentration in water of the pond reached 25 mg/l (50 000 MPCw). Later after the evaporation ponds started to be used mercury concentration in the pond Balkyldak decreased in 1985-1993 and amounted 1-10 µg/l (2-20 MPCw). However unauthorized extraordinary discharges of mercury containing wastewater happened even in 1990s for example in 1992 local increase of mercury concentration up to 10 mg/l in the pond Balkyldak was recorded.

Special evaporation ponds of 3 m depth each consisted of 3 parts (one of these parts was used for solid mercury wastes) are located in the immediate proximity of the south lakeside and had area of 18.3 hectares. Mercury concentration in water of middle and east sections of the ponds fluctuated between 2.35 and 51.5 mg/l. Total volume of mercury containing materials in the evaporation ponds in early 1990s amounted as much as 270000 tons.

It was recorded that the extension of contaminated groundwater area with exceeding MPCw  occurred around the Lake Balkyldak  In 1985 mercury was found only in the boreholes located in 10-150 m from south and southwest bank line within area 2-3 km2, while in 1987 this area widened  already up to 12-15 km2. The area of mercury pollution spread calculated on melted snow water contaminated higher than MPCw values was estimated as 255 km2. Wind-induced blowing up of snow and ice from the surface of the pond Balkyldak and special evaporation ponds as well as dispersion of vent exhausts from the electrolyses production are considered as the most probable reasons of mercury spread. In winter of 1992-1993 significant decrease in the area of snow cover contamination was recorded as a result of the chlor-alkali production decline.   

 

3.2. Research of potential contamination of Lake Muyaldy /47/

 

The closed salt Lake Muyaldy which has given a name to a mud cure resort is located 4 km to the south-east from the pond Balkyldak. It is oval-shaped lake of 1640 m x 840 m which fills depression and has flat swampy banks. Until 1967 the main recharge of the lake came from melted snow water, groundwater and rainfalls. Then it was artificially supplied from an artesian well located on the north lakeside. It brought to the mineralization level decrease from 300 g/l to 80 g/l.

There were 16 boreholes drilled along 3 cross sections which were perpendicular to groundwater flow from the west. Groundwater sampling was carried out monthly during the year 1990-1991. Water samples were analyzed by cold-vapor atomic-adsorption spectrophotometer with detection limit of 500 ng/l. Both groundwater and surface water samples contained mercury below this detection limit.    

    

3.3. Study of snow cover and soil mercury contamination /48-52/

 

The study was conducted by the Center of Health Protection and Soil Institute in 1990–1992 and Soil Institute and Research Institute of New Technologies and Materials of Kazakh State University (KazGU) in 1991-1993 in the framework of IEA development for PCP /53/.  

In winter 1990-1991 snow cover of residential area and south part of North industrial area was investigated with regards to mercury contamination.  Exceeding MPCw for mercury in the snow melted water was found around the gardening cooperative “Khimik”. Most likely it was found the south end of the mercury anomaly located to the north from the investigated area. In 1991-1992 the area of interest was extended up to the north border of the PCP industrial site, and besides 45 samples of snow melted water additional 32 samples of soil were taken down to the depth of 50cm. In the gardens of the north suburb 96 samples of fruit and vegetables were taken. Exceeding MPCw for mercury was found in snow melted water around PCP over the vast area (southward of Pavlodar Tractor Plant, westward Lake Muyaldy and eastward the Irtysh Riverbed) however there was not found any mercury contamination of soils as well as fruit and vegetables.

Study of 1993 included the sampling of 150 soil samples from 28 boreholes (down to the depth of 2 m) northward of industrial site of PCP (at the area of 500 km²) and didn’t reveal the mercury concentration in soil exceeding 0.5 mg/kg (0.4 MPCs). In 42 agriculture products and 26 samples of groundwater and surface water taken in the same area mercury presence was not found as well. There was the only exception – one sample from the pond Balkyldak where 0.1 µg/l of total mercury (2 MPCw) was found.

These field works showed the annual mercury contamination of snow cover coming from atmospheric precipitation did not lead to significant contamination of soils around PCP in early 90s because most likely this way of the mercury contamination spread had short term of existence.       

 

3.4. Study of mercury contamination of soils and surface water in the framework of INTAS -Kz 95-19 project in 1997-1999 /54/

 

Project INTAS–Kz 95-19 funded by EU was accomplished by the team of “GeoKEN” Ltd. which later became a part of Institute of Natural Science, Almaty (INS). KazGU also took part in the works. The project included two field study of 1997–1998 in the area of more than 1000 km2 northward of industrial site of PCP that covered area around ponds Balkyldak and Sarymsak as well as floodplain of the Irtysh River. According to the regular grids of 0.7x0.7 km, 1х1 km and 2.8x2.8 km more then 2000 samples of soils were taken from the depth of 0-15, 15-30 and 30-50 cm.  From the same area about 100 samples of surface water and 100 samples of bottom sediments were taken.  About 600 soil and sediments samples were tested in regards of presence of 7 heavy metals using spectral analysis and all these samples were analyzed for mercury content with atomic–absorption method.

No exceeding of MPCs for any of heavy metals was found except some cases of mercury presence close to the north boarder of Site #1, as well as close to special evaporation ponds on the shore of the pond Balkyldak (fig.9). However several hotspots with increased mercury concentration (100 times higher then local background concentration) were found mainly in local depressed areas where snow melted water accumulate in springs. There were also hotspots with increased mercury concentration (not exceeding MPCs) in soils and bottom sediments of oxbows of the Irtysh River and in shoaling  surface water of the Irtysh River and in oxbows water at the level of MPCw. Such mercury contamination of the Irtysh River floodplain was explained by possible rise of mercury contaminated groundwater up to the surface.

Average level of surface water contamination with mercury in the pond Balkyldak was estimated as 1 µg/l (2 MPCw).        

 

 

Fig.9. Area of field works on INTAS-Kz 95-19 project (points on the map - soil sampling points)

 

4. Risk assessment of mercury contamination in Northern industrial site of Pavlodar in 2001-2002 in the framework of ICA2-CT-2000-10209 “Toxicmanagement” EU INCO-2 Program /55/

  

4.1. “Toxicmanagement” Project

 

In 2002 the research of Pavlodar City Northern industrial site mercury contamination financed within the framework of INCO-2 Program of the European Union was completed. The project involved two-year program of field and chemical-analytical works and also the development of mathematical model of mercury contamination distribution with groundwater at the area of PCP carried out by the Consortium of Kazakhstani and foreign universities, research institutes and companies.

The Kazakhstani partners within the project INCO-2 ICA2-CT-2000-10029 "Development of cost-effective methods of minimizing risk from heavy metal pollution in industrial cities: a case study of mercury pollution in Pavlodar" ("Toxicmanagement") were BG Chair of Environmental Technology of Almaty Institute of Power Engineering and Telecommunication (AIPET), Institute of Hydrogeology and Hydrophysics (IHH), KazGU and INS. The foreign partners were the Department of Civil Engineering of Southampton University, Great Britain (SU) – the coordinator of the project, Consulting Company "GeoDelf", Netherlands (GeoDelf), JV Evrohim and Siberian Spiritual-Ecological University, Omsk, Russia (SSEU).

The results of the research were reported at the meeting of Presidium of the National Academy of Sciences of the Republic of Kazakhstan on the 15th of April, 2003 /56/.

 

4.2. Collection and study of archival data

 

In 2001 IHH, KazGU and INS collected archival hydro-geological data for Pavlodar City industrial site in archives of TU “Yuzhkaznedra” in Almaty, Republican Center of Geological Information “Kazgeoinform” in Kokchetav, PHH and PCP. The hydro-geological maps made for the various periods of time (32), hydro-geological cross sections (90), data (description of cross sections, boreholes design, results of pumping-out and observation for groundwater level regime, chemical composition of groundwater) for more than 1000 hydro-geological boreholes drilled by different organizations since 1960 till 2000 were acquired or copied.

 The collected data were studied and analyzed by IHH and on the basis of a part of the data a database was created with the software FoxPro 3.0, and also the Geographic Information System IHH (GIS IHH) was designed with use of MapInfo 5.0 software. While GIS IHH creating hydro-geological maps were scanned and then digitized. At the same time the layers were formed containing the information about the location of mapped boreholes and also objects rendering essential influence on hydro-geological conditions such as: the Irtysh River, lakes, thermal power plants TES 2 and TPS 3 ash lagoon, drains, sewage ponds, territory of PCP etc.

 

4.3. Field work

 

The scales of soil and ground mercury contamination within the territory of PCP and around it, groundwater and surface water, bottom sediments and various biological materials selected in the Northern industrial site of Pavlodar were estimated (fig.10). The area of field research was originally confined from north by the main irrigation canal near Michurino village, from east – by Lake Muyaldy, from south – by TES 2 and 3 ash lagoon, however, during the work it was localized within the area of 50 km2, confined from south and east by the Industrial Site #1 of PCP, from north - by the wastewater storage pond Balkyldak, from west – by Irtysh River floodplain.

 

 

Fig.10. Area of field works on the project ICA2-CN-2000-10209 «Toxicmanagement» (points on the map – groundwater sampling points, black – mercury concentration in water below 500 ng/l, red – above 500 ng/l)

 

SU, KazGU, AIPET, INS and IHH carried out three joint expeditions: in summer and autumn of 2001, and also in summer of 2002; at the same time representatives of GeoDelf, SSEU, Stepnogorsk Laboratory of Biomonitoring (SLM), Institute of Microbiology and Virology (IMV) and EPA USA visited the area of fieldwork to carry out their own research programs. IHH rendered their assistance in initial investigation of observation boreholes in 2001 and in machine drilling of 36 new boreholes in 2002. PCP gave its assistance in carrying out the fieldwork and also in providing a premise for chemical-analytical laboratories. 

In the research of soil mercury contamination Consortium was guided by results of fieldwork in northern suburb of Pavlodar carried out by KazGU and INS under the Program of fundamental investigation of National Academy of Sciences of the Republic of Kazakhstan in 1993 and INTAS-Kazakhstan 95-17 project in 1997-1998. It allowed basically limiting the investigated area to the  Industrial Site #1 of PCP (INS, SU and KazGU took samples, INS carried out chemical analysis of the samples) and territory between the Industrial Site and the Pond Balkyldak (KazGU and AIPET took samples and carried out their chemical analysis).

In 2001 samplings were carried out according to a regular grid with steps of grid of 13, 20, 26, 125 and 500 m from three layers of 0-10, 10-20 and 20-50 cm deep. In 2002 additional samples of ground from the territory of the Industrial Site #1 were taken from pits and boreholes from the depth of down to 4 m. In 2001 KazGU also took samples of soil and ground in Pavlodarskoe village from two layers of 0-10 and 10-20 cm deep, around the special evaporation ponds from three layers of 0-10, 10-20 and 20-50 cm deep and around the wastewater storage pond Balkyldak from the depth of 5-15 cm. In 2002 INS took samples in the territory of the special evaporation ponds from three layers of 0-10, 10-20 and 20-50 deep. The sampling points were coordinated with the use of GPS. In total 2026 samples of soil and ground were taken.

In 2001 and 2002 during summer fieldwork in the territory of the Industrial Site #1 INS daily measured mercury content in the near-earth layer of atmospheric air using atomic absorptive photometer AGP-01. These measurements were done also with the purposes of safety for personnel and were the justification for protective coveralls and gas masks use.   

AIPET and KazGU carried out investigation of groundwater in Northern industrial site of Pavlodar with the help of the existing network of observation boreholes (in total 304 boreholes have been observed) and also 89 boreholes were drilled additionally including 36 ones with diameter of 108 mm and depth from 5 to 15 m, and 53 ones with diameter of 45 mm and depth from 1 to 3.6 m.

In summer of 2001 all existing observation boreholes (including unaccounted, abandoned and lost) and also 30 operational boreholes in Pavlodarskoe village and nearby industrial enterprises were investigated within the area exceeding 200 km2 around of the electrolysis shop of PCP (Building 31). Their coordinates were determined by use of GPS, and also measurements of water levels, water temperature, рН, red-ox potentials were done. With the help of submersible electric pumps the boreholes were pumped through according to specially developed technique excluding a sample contamination and water samples were taken to determine chloride and total mercury content. In autumn of 2001 KazGU drilled 13 boreholes with diameter of 45 mm and depth down to 3 m by hand along assumed groundwater plume of mercury contamination. These boreholes and also 9 boreholes close to the mercury hot spots under the electrolysis shop and 6th pumping station of wastewater were investigated similarly to the summer program, moreover water samples were taken from all these boreholes for determination of sulfate and sulfide content. Additionally water level measurements were made repeatedly for the majority of the found observation boreholes. In total in 2001 water levels were measured for 189 boreholes and water samples for total mercury determination were taken from 151 boreholes.

In summer of 2002 PHH drilled 36 new observation boreholes with diameter of 108 mm, reaching the level of basalt clay of the Pavlodar suite along assumed direction of mercury contaminated groundwater plume distribution. In the area towards the Irtysh River and Pavlodarskoe village INS by hand drilled 33 boreholes with a diameter of 45 mm reaching of a static level of groundwater. All these boreholes were coordinated with the use of GPS, besides all of them and also 57 old boreholes (totally 126 ones) were leveled to 1 cm. Between the special evaporation ponds and the wastewater storage pond Balkyldak SLM and KazGU drilled 7 boreholes with diameter of 45 mm and depth from 1 up to 2 m to do sampling of groundwater moving from the special evaporation ponds to pond Balkyldak. In 2002 groundwater tables were measured in 163 boreholes, groundwater samples for total mercury content determinations were taken from 83 boreholes. 

In 2001 and 2002 KazGU and INS took samples of surface water from the Irtysh River and its oxbow lakes, Lake Muyaldy, TES 2 and 3 ash lagoon, wastewater storage pond Balkyldak, special evaporation ponds, canals, drains and open pits, situated to the north of the territory of PCP. Water samples were also taken from the sewage system and collectors of the wastewater pumping stations. Totally 63 samples were taken.

In 2001 AIPET and KazGU took samples of bottom sediment of the wastewater storage pond Balkyldak in its southwest part, along an imaginary chord linking its extreme southern and northern points together and also in its northeast part. The samples were selected being at a boat from the depth down to 10 m using special samplers. Totally 34 samples were taken.

In 2001 55 samples of fishes were caught by KazGU out of the pond Balkyldak: a silver crucian, a tench, a Siberian dace, a river perch. In 2002 30 samples of fishes were caught out of the Irtysh River and its floodplain lakes: a pike, a pike-perch, and a river perch.

In 2002 in Pavlodarskoe village KazGU took 15 samples of milk of cows a pasture for which was the territory between the industrial site of PCP and the wastewater storage pond Balkyldak. In 2001 SU and KazGU took samples of gramma grass in the area of 6th wastewater pumping station and 300 m to the north from it, in 2002 - samples of a kidney and liver of two-year cow in Pavlodarskoe village, in 2001 and 2002 - samples of hair of PCP workers.

Soil and ground samples were analyzed for total mercury content in laboratories of AIPET, KazGU and INS in Pavlodar and Almaty cities; water samples - for total mercury contents, chlorides, sulfates and sulfides and milk samples – for total mercury content - in laboratories of KazGU and INS in Pavlodar; silt, fish and bio-materials samples for total mercury content - in laboratories of AIPET and KazGU in Almaty. In total 2060 samples of soil, ground, sludge and silt were taken and 325 samples of water and milk, 95 samples of fish tissue and other biological materials were taken and analyzed for total mercury content.

The results of field research and laboratory analyses and also sampling point coordinates were compiled into Summary tables serving as a database for GIS AIPET designing. GIS AIPET was designed using the program MapInfo 5.0 and ArcMap 8.1 on the basis of topographical maps and plans of different scales, which first were scanned and then digitized similar to GIS IHH. Having interpolated the data about soil mercury contamination with the help of a module Spatial Analyst of Inverse Distance Weighted (IDW) method AIPET produced models and maps of mercury distribution over three upper soil layers (fig.11-16). Based on the models there were calculated capacities of mercury contaminated ground with contamination levels of < 2.1; 2.1-10; 10-100; 100-1000 and >1000 mg/kg and also amount of mercury deposited in the soil of contaminated areas

 

4.4. Main results of expedition works

 

Investigation of mercury contamination of soil in the territory of PCP and around it (fig.11-16)  has allowed revealing some large centers of contamination with mercury concentration which was 500 times more than MPCs for mercury (2.1 mg/kg): four of them were at the territory of the Industrial Site #1 and came from the electrolysis shop 31, the shop of production solutions regeneration, tanks for mercury containing wastewater storage and the building of mercury contaminated wastewater treatment plant; one of them was on the shore of the pond Balkyldak and was connected with special ponds for storage of mercury wastes. 

Three mercury hotspots at the territory of Industrial Site #1 were formed by spill of either mercury containing solutions or liquid metal mercury. Their intensity was being changed not very much along the depth of sampling in a soil layer down to 0.5 m. The source near the northeast corner of the Building 31 was at the surface and either was formed at the cost of dispersing mercury containing solid wastes or arose fairly recently during dismantling the equipment. The highest concentration of mercury in ground were found 1.7 m deep both near the electrolysis shop (Building 31) and  under its concrete floor  slab (tens and hundreds of g/kg). High mercury background concentration (from 1 to 50 of MPCs) in soil layer of 0-50 cm within the area of about 1 km2 around the former manufacture of chlorine and caustic was bound up with high mobility of mercury forms, which provoke the contamination.

The hearth of soil mercury contamination in the area of the special ponds was rather shallow and was formed by wind transfer of dispersed solid mercury containing wastes.

 

 

Fig.11. Map of topsoil (0-10 cm layer) mercury contamination at Industrial site # 1 of PCP

 

 

Fig.12. Map of soil (10-20 cm layer) mercury contamination at Industrial site # 1 of PCP

     

 

Fig.13. Map of soil (20-50 cm layer) mercury contamination at Industrial site # 1 of PCP

 

The location of one of two (the western one) less intensive hearths of topsoil contamination between the Industrial Site #1 and the special ponds has overlapped a contour of spread of plume of mercury contaminated groundwater and, probably, was caused by their reach of a surface at the cost of evaporation and capillary effects. Second hearth (eastern), probably, was formed by leaking mercury containing wastewater from the sewerage system and their accumulation within this area. This assumption was proved by numerous detection of high concentration of mercury in the borehole 7Р (4250 ng/l in 2002) made by different organizations within many years.

Amount of soil and ground in the layer of 0-50 cm polluted higher than 10 mg/kg, and also amount of mercury there were (without mercury deposited under the Building 31), accordingly, 19263 m3 and 2931 kg for the territory of the Industrial Site #1 of PCP, and 79542 m3 and 16022 kg for the territory between the wastewater storage pond Balkyldak and the Industrial Site of PCP.

The level of mercury contamination in atmosphere near to the Building 31 in summer time considerably exceeded daily average MPCda (300 ng/m3) amounting to 25000 ng/m3 at the cost of metal mercury evaporation from the surface of ground and construction materials and exceeded 100000 ng/m3 at demercurization works carrying out. Spread of the air pollution was confined by the radius of 200 m around the site of chlorine and caustic soda production and considered as a local threat.

Investigation of existing observation and production boreholes in 2001 showed that the spread of groundwater with mercury contents more than MPCw (500 ng/l) was confined within the territory of the Industrial Site, places where the sewerage system went and area of the special ponds. Numerous investigation of the borehole 24-91, located 2 km to west from the Building 31 and in water of which it was originally found the mercury concentration of 1564 ng/l (3 MPCw), showed that this borehole was contaminated with mercury during the previous samplings. In none of water samples selected from production boreholes in village Pavlodarskoe it was revealed mercury more than 7 ng/l (0.014 MPCw), that practically coincided with the mercury detection limit according to used analytical procedure.

 

 

Fig.14. Map of topsoil (0-10 cm layer) mercury contamination around Industrial site # 1 of PCP

 

 

Fig.15. Map of soil (10-20 cm layer) mercury contamination around Industrial site # 1 of PCP

 

 

Fig.16. Map of soil (20-50 cm layer) mercury contamination around Industrial site # 1 of PCP

 

The drilling in 2002 a new cross section of observation boreholes which was located perpendicularly to groundwater flow in the distance of 1.2 km from the Building 31 allowed a plum of mercury contaminated groundwater going from the main center of mercury pollution to the north-northwest direction to be disclosed. Contouring this plume showed that it is maximum 350 m broad and more than 2 km long, at that the flow of the polluted water moved over the layer of basalt clay of Pavlodar suite at the depth from 6 down to 14 m depending on a relief and surface geometry of basalt clay layer (fig.17). The concentration of mercury within the plume changed from 65 µg/l (130 MPCw) near the Building 31 to 50 µg/l (100 MPCw) near the 6th wastewater pumping station and further up to 45 µg/l (90 MPCw), 0.8 µg/l (1.6 MPCw), 1.1 µg/l (2.2 MPCw), 0.9 µg/l (1.8 MPCw), 0.4 µg/l (0.8 MPCw) every 200-300 m. Ten new observation boreholes that were drilled to the west from the plume of mercury contaminated groundwater showed that the distribution of mercury pollution to this direction is not revealed.

 

 

Fig.17. Hotspots of groundwater contamination with mercury above 500 ng/l according to 2002 investigation of observation boreholes

 

Surface water in the special ponds being accumulated because of atmospheric precipitation was contaminated with mercury up to a level of 50 mg/l (100000 MPCw), in pits to the south from the special ponds - from 3 to 30 µg/l (6-60 MPCw), in the drain going along the motorway in the direction to western dam of the pond Balkyldak - from 2 to 18 µg/l (4-36 MPCw), in the pond Balkyldak near the special ponds - from 3.5 µg/l (7 MPCw) up to 100-300 ng/l (0.2-0.6 MPCw) in shoaling water along the rest of the coast. The mercury contents in water of an unfinished emergency canal extended from the pond Balkyldak to the Irtysh River was not more than 10 ng/l (0.02 MPCw), in floodplain lakes of the Irtysh River near the villages Pavlodarskoe and Shauke - not more than 9 ng/l (0.018 MPCw), in the Irtysh River - was lower than the detection limit 2 ng/l (0.004 MPCw) of used analytical procedure.

The mercury concentration in the sludge of the special ponds ranged from 10 mg/kg to 10000 mg/kg (2-2000 MPCs), in bottom sediment of the pond Balkyldak – from 1 mg/kg to 500 mg/kg (0.5-250 MPCs). Groundwater moving from the special ponds to the pond Balkyldak on the depth of 1.5-2 m was contaminated with mercury up to the level of 2-3 mg/l (4000-6000 MPCw).

Silver crucian is the main fish species living in the pond Balkyldak. Predatory fishes were not found there. Total mercury concentration in tissue of fishes caught from the pond Balkyldak ranged from 0.18 up to 2.2 mg/kg and exceeded MPCf for non-predatory fishes (0.3 mg/kg) in most cases. Concentration of mercury in tissue of predatory fishes (mainly pike) caught in the Irtysh River and its floodplain lakes near villages Pavlodarskoe and Shauke, ranged from 0.075 to 0.16 mg/l that did not exceed 0.3 MPCf for predatory fishes (0.6 mg/kg).

Gramma grass taken near the 6th wastewater pumping station contained mercury from 1 mg/kg to 2 mg/kg, however, mercury contents in milk, kidneys and liver of cows pastured in the territory between the Industrial Site #1 and the pond Balkyldak did not exceed a similar parameter for these products from other not polluted areas. Two samples of a hair belonged to employees of PCP contained mercury at the same level as a hair of residents of Almaty.

 

 4.5. Main results of study of the archival and fieldwork data

 

There is an aquifer in contemporary alluvial sediments of the Irtysh River floodplain (аQIV), an aquifer in upper quaternary sediments of the first above floodplain terrace (аQIII) and a water-bearing complex in Falunian of low-middle-Pliocene sediments of Pavlodar suite (N1-2pv) within the research area confined by the Irtysh River, the main irrigation canal, the ash lagoon of power plants TES-2 and TES-3 and the Lake Muyaldy. Clays of Kalkaman suite of Neogene are the first regional basalt layer.

The aquifer in contemporary alluvial sediments in the western part of the research area looks as a narrow strip along the Irtysh Riverbed. Water holding rocks consist of coarse sand with inclusions of grit with capacity of 4-8 m. Groundwater is fresh and hydrocarbonate-sulfate. The depth of occurrence ranged from 0 down to 5.5 m. Groundwater has good hydraulical connection with the Irtysh River water. Yield of boreholes changes from 0.1 up to 15 l/s when groundwater tables become 1.4 - 3 m lower.

Aquifer in upper quaternary alluvial sediments of the first terrace above the floodplain occurs over the most part of the research area. Water holding rocks consist of medium-size and coarse sand; small-grained and fine sand and clay sand are less frequent there. There is underground water there. The depth of occurrence of a daturence surface ranges from 1.5-3 down to 6.5-7 m. The water is fresh and slightly salty with mineratization from 0.5 to 2.2 g/l, hydrocarbonate, hydrocarbonate-sulfate. In area of the pond Balkyldak, water-logged grounds and 6th wastewater pumping station water with chloride – sodium mineralization from 6.2-7.2 to 27.1-35.5 g/l was revealed. Yield of boreholes ranged from 0.3-0.5 to 0.9-3 l/s when underground water tables become 0.8-2 m lower. According to the data of single and group pumping a filtration coefficient ranges from 10 to 20-30 m/day.

Aquifer in falunian of low-middle-Pliocene sediments of Pavlodar series (N1-2pv) occurs within the research area practically everywhere. In the west it is overlapped with contemporary and upper quaternary sediments, and in the east it reaches an original ground. Groundwater usually occurs at the same place where lenses and local interlayers of medium-size sand are located. Total capacity of the aquifer complex ranges from 3-5 to 15-20 meters. There is mainly weakly pressed water alternating sometimes with groundwater. The depth of occurrence of the groundwater table in natural conditions ranged from 1 to 15m. Maximal depths were reported to be in the southeast part. After the ash lagoons of TES-2 had been arranged there the daturence surface of groundwater began to rise, and now the depth of groundwater occurrence there ranges from 0 down to 2-3 m. Groundwater table has also gone up near ponds Balkyldak and Sarymsak. Water is mainly fresh with mineralization from 0.5 to 0.8 g/l. In the area of the Site #1 sulfate-chloride and sodium water with mineralization of 2.5-7 g/l were disclosed. In the very vicinity of the shop 31 groundwater mineralization reaches 60-70 g/l. Yield of boreholes ranged from 0.05-0.8 to 1-2 l/s when groundwater tables become 1.1-0.9 m lower. Filtration coefficients of water holding rocks ranged mainly from 1-3 to 5-8 m/day. Clays of Kalkaman suite being regional basalt layer, spread everywhere under the aquifer complex.

Forming of groundwater of the area under natural conditions was mainly occurred due to the infiltration of atmospheric precipitation and inflow on external borders. The groundwater of contemporary sediments, upper quaternary sediments and the one of Pavlodar suite have good hydraulic connection with each other. The flow of the groundwater forming in the sediments of the Pavlodar suite, partially discharged into upper quaternary sediments, and then into a floodplain, which was drained by the Irtysh River. Groundwater also discharged into depressions of lakes by means of evaporation and as a result of outflow on external borders.

The wastewater discharge into the pond Balkyldak began in 1970, in 1972 with setting up power plant TES-3 operation of power plant TES-2 ash lagoon has became more active because since then it has been used by both power plants. Since 1977 POR’s sewage pond Sarymsak has being filled gradually. In 1992 the main irrigation canal being northern border of the research area was filled in by water and water transfer from the Irtysh River onto irrigation fields began. Sewage ponds, the ash lagoon and irrigation system became the intensive sources of groundwater recharge. At present man made factors dominate and in many respects determine groundwater regime in the investigated territory. The powerful flow of groundwater formed in area of the ash lagoon of power plants TES-2 and TES-3 in result of filtration losses goes through the territory of PCP and becomes contaminated with mercury and transports it mainly to north-northwest direction.

 

4.6. Main content of works on simulation hydro-geological conditions

 

In 2001-2002 the work of IHH on creating the model involved following basic stages: (i) schematization of natural conditions, (ii) preparation of initial data, (iii) creation the model itself and its calibration, (iv) solving prognosis tasks.

At the first stage all collected information was looked through and analyzed, their comprehensiveness, reliability and consistency were estimated. The model of process has being chosen. The borders of the model were designed and their schematization with boundary conditions and also the schematization of simulated object (the quantity of layers was determined) was carried out, the requirements to grid approximation of simulated area in horizontal projection were determined. Created GIS IHH and database were used to analyze the data. For the modeling process the system GMS 3.1 was acquired; it was installed into a computer network of IHH, documentation on use of the system was translated to Russian.

The initial data for modeling were prepared in accordance with the results of schematization of hydro-geological conditions and peculiarities of the modeling system GMS 3.1. Maps of hydro-geological parameters were produced for each layer of the model. Values of dynamic parameters describing processes on borders of the model (water levels in wastewater storage ponds Balkyldak and Sarymsak) were calculated for every time step. The preparation of the initial data was carried out using the GIS and the database.

The prepared initial data were converted to formats used by the modeling system GMS 3.1. It was calibrated to prove the model is adequate to natural conditions. In process of calibration the conditions existing for the undisturbed period (1970) and then for the period since 1970 till July 2001 were reproduced in model. By fitting parameters they achieved coincidence of solutions obtained in the model, with the facts obtained as a result of field research during the last years and summer of 2001. When the coincidence appeared to be satisfactory it was accepted that the model adequately described hydro-geological conditions and could be used for forecasting their change. For the production and calibration of the model the program PEST being part of the complex GMS 3.1 and also own developments of IHH were used.  

 

4.7. Main results of simulation

 

There were solved both inverse stationary and inverse non-stationary problem. The stationary problem which was being solved, represented the year 1970. During solving the non-stationary problem the period since 1970 till the middle of 2001 was reproduced in the model. An average error of the solution of the inverse stationary problem was about 0.01 m. The maximal error of the solution of the inverse non-stationary problem in the area of spread of the groundwater mercury contamination plume did not exceed 0.5 m that was permissible one in this case. During solving the inverse non-stationary problem the groundwater mercury contamination was reproduced in the model. Consultation with JV Evrohim allowed assumption to be done that the main source of the pollution was located under the shop 31, and the second one was in the area of 6th wastewater pumping station. Coincidence of results of the solution with actual data obtained during field research in 2001-2002 (fig.18) was satisfactory therefore the model was used for the solution of prognosis tasks.   

 

 

Fig.18. Spread (m) of plume of groundwater contaminated with mercury up to 500 ng/l (red area – on the results of field work of 2002, blue contour - on the result of simulation of hydro-geological conditions as of 2002)

 

Three variants of the prognosis were made in the model:

- the first variant allowed for keeping two sources of mercury contamination of groundwater (under the shop 31 and in area of 6th wastewater pumping station), and also that hydro-geological condition would remain at the same level as in 2001. The prognosis was done for case if the concentration of mercury in the sources remained constant during all the prognosis period;

- according to the second variant of the prognosis the source under the shop 31 was completely isolated with help of cut-off walls;

- according to the third variant two sources of mercury (under the shop 31 and in area of 6th wastewater pumping station) remained the same, but however it was simulated cessation of water delivery from the Irtysh River onto a water treatment plant, located to the west from the Industrial Site #1 of PCP.  

Based on the results of the simulation (the first variant of the prognosis), it was established that the plume of groundwater polluted with mercury would spread to the north-northwest direction at the depth from 5 m to 15 m over the clay layer of the Pavlodar suite (fig.19). If the direction of groundwater movement does not change, there will be no serious threat to inhabitants of Pavlodarskoe village and Irtysh River. However there it will be possibility for a small amount of mercury to get into the emergency discharge canal whose construction is not finished yet going from the pond Balkyldak to the western direction. The second variant of the prognosis (fig.20) has allowed the conclusion to be done that construction of cut-off wall around the source of mercury under the Building 31 will not solve completely the problem of improvement of groundwater quality, as there one more though less strong source of pollution in the area of the 6th wastewater pumping station still remain. The third variant of the prognosis (fig.21) has shown that the direction of spread of mercury contaminated groundwater plume can change if hydro-geological conditions are different. Cessation of water delivery onto the water treatment plant will reduce groundwater recharge to zero on its territory that will affect a configuration of groundwater surface and the direction of their movement. As a result the plume can change its direction to the west and threat to Pavlodarskoe village and Irtysh River can arisen.

 

4.8. Conclusions and recommendations of “Toxicmanagement” project

 

Mercury contamination of groundwater used for drinking water supply. In northern and northwest suburbs of Pavlodar City all boreholes used for drinking water supply contain mercury of lower concentration than permissible level. This territory includes Pavlodarskoe village. Water supply using groundwater in this area can be considered as safe from mercury contamination.

Mercury concentration in water and fish of the Irtysh River and its floodplain lakes. There is no any considerable mercury contamination in the Irtysh River and fish inhabiting it; the mercury concentration there is much lower than the maximum permissible concentration.

Mercury contamination levels in the area of the former electrolysis shop. It is necessary to finish the works projected by JV Evrohim as soon as possible and connected to encapsulation of the main hearth of the contamination from an environment. The building 31 should be demolished and its building structures placed into a landfill. Also construction of the bentonite cut-off wall reaching down to regional basalt clay layer should be completed. If the cut-off wall functions in accordance with the plan and prevents the groundwater containing soluble salts of mercury from further horizontal spreading there is no necessity to take out and clean the concrete floor slab of the electrolysis hall of the shop 31, and also ground under it. The thermal treatment of the construction materials, strongly contaminated with mercury can be postponed for the future, when mercury price probably increase and its extraction becomes economically justified. However in this case it will be necessary to isolate things confined by the cut-off wall, so that it will become impenetrable for atmospheric precipitation from outside and mercury vapor from inside that will stop polluting an atmosphere. It will require construction of specially designed cap (which also should stop capillary lifting) further to the works which were designed by JV Evrohim’s design.

 

 

Fig.19. Spread (m) of plume of groundwater mercury contamination on the results of simulation of hydro-geological conditions as of 2031 (first prognosis scenario)

 

 

Fig.20. Spread (m) of plume of groundwater mercury contamination on the results of simulation of hydro-geological conditions as of 2031 (second prognosis scenario)

 

 

Fig.21. Spread (m) of plume of groundwater mercury contamination on the results of simulation of hydro-geological conditions as of 2031 (third prognosis scenario)

 

Mercury contamination of soil around chlorine and caustic soda production. The soil contaminated above sanitary norms which is outside the territory confined by cut-off wall, should be taken out and placed into specially designed landfill and isolated from action of groundwater and atmospheric water.

Mercury pollution of ambient air. Under demercurization work carrying out it is necessary to take dust-depressive measures, to use more efficient temporary covering for mercury contaminated soil and the concrete floor slab of the hall of the shop 31, and also to stop using the existing plant for thermal treatment of mercury containing construction materials (fig.22).

 

 

Fig.22. Plant for thermal demercurization of solid waste

 

Spread of the mercury contaminated groundwater plum. The plum of mercury contaminated groundwater does not threaten the Irtysh River and Pavlodarskoe village if there is no considerable additional interference changing adversely hydro-geological conditions in the Northern industrial site in Pavlodar. If the original source of mercury contamination which occurs under the Bbuilding 31 is contained, then even under adverse changes of hydro-geological conditions the mercury will not be able to reach the Irtysh River and Pavlodarskoe village. Demercurization conducted in addition to work stipulated by JV Evrohim demercurization project and also the containment of the secondary source of contamination - 6th wastewater pumping station with the help of the cut-off wall will stop the further local mercury contamination of groundwater.

Special evaporation ponds for liquid and solid mercury wastes. In addition to work stipulated by JV Evrohim demercurization project it is necessary to isolate the special ponds for mercury wastes with the help of bentonite cut-off wall reaching the regional basalt clay, and specially designed cap, impenetrable for mercury vapor and atmospheric water.

Wastewater storage pond Balkyldak. FISH FROM WASTEWATER STORAGE POND BALKYLDAK CONTAINS TOXIC LEVELS OF MERCURY. FISHING FROM THE POND SHOULD BE PROHIBITED IMMEDIATELY AND THE ACTIVE STEPS FOR IMPOSING THIS BAN SHOULD BE UNDERTAKEN. It is necessary to continue studying the wastewater storage pond Balkyldak status in order to make long-term decision associated with its mercury contamination.

  

4.9. Additional researches of IHH: simulation of hydrological processes in the Northern industrial site of Pavlodar /57/

 

On the base of the model of 2002 developed during “Toxicmanagement” project implementation IHH made in 2003 the forth scenario of the plume spread in case of full confinement of two sources of contamination with help of cut-off wall (under the Shop 31 and 6th wastewater pumping station). 

This scenario (fig.23) showed that without these two sources of contamination the plume in 2005 must split into two areas. At that by 2031 the south area will decrease to 100 m in diameter and its center will be located 100 m eastward from the 6th pumping station and mercury concentration in it will decrease to 2-6 MPCw. The north area will have a center located 0.5 km westward of special ponds, its maximal spread will not increase 0.85 km, and mercury concentration in groundwater will not reach the value above 15-20 MPCw. Thus at isolation of the both sources of mercury entering to groundwater the risk posed by groundwater mercury contamination will be minimized.   

With the help of the hydrological model of Northern industrial site of Pavlodar the calculation of amount of mercury in the plume volume was made. Detailed vector map of spread of concentration of mercury salts in the plume volume was produced. The calculation showed that without taking mercury absorbed on enclosing rocks into consideration water of plume contains 24.2 kg of mercury (the plume dimensions: length – 1.9 km, maximal width – 470 m and square – 0.65 km2).   

 

 

Fig.23. Spread (m) of plume of groundwater mercury contamination on the results of simulation of hydro-geological conditions as of 2031 (fourth prognosis scenario)

 

5. Correction of JV Evrohim design /58, 59/

Correction of the working design of demercurization developed by JV Evrohim in 1995 was recommended by National Academy of Science of the Republic of Kazakhstan (the letter of Vise President of NAS RK #481 of 13.05.2003) /60-61/. Necessity of such correction was caused by the fact that scope of work specified by the project and accomplished in 1998-1999 prevented substantially the tread of the Irtysh River mercury contamination from the Northern industrial area of Pavlodar. Besides in 2001-2002 the data on sufficiency of cut-off wall to encapsulate the mercury source was received and there were no need to extract and treat concrete floor slab and the soil from under the Shop 31. Moreover new hotspots of soil, groundwater and ambient air mercury contamination were found which required additional demercurization activities. 

It was also found that the special ponds for liquid and solid mercury wastes were very dangerous source of an environment contamination by mercury and need to be isolated from groundwater and ambient air urgently but not after completing first stage of demercurization works as it was scheduled in the project of 1995. At the same time it was ascertained that for the period of time passed since 1993 the buildings of the chlorine and caustic soda production had come to state of nonoperability and become the source of environment pollution by mercury and could not be used in productions newly being created. That brought to necessity to dismantle the building structures and equipment of the shops with their following demercurization.

Taking into account the technical characteristics of demercurization objects, their location in the industrial site and accumulated experience in demercurization activities the next methods of demercurization were suggested by the correction of the working design:

- confinement of both hotspots of groundwater mercury contamination and special evaporation ponds for mercury wastes with help of cut-off walls,

- excavation of topsoil heavily contaminated with mercury down to the depth of 0.5 m at some spots followed by their burial at the special ponds’ sections. The area after excavation should be resoiled with clean ground,

- construction of a cap impermeable for mercury vapors and atmosphere precipitation on the top of areas confined by the cut-off walls including special evaporation ponds,

- demercurization of buildings and production structures through their dismantling, cleaning from sludge and debris  followed by burial of the mercury containing wastes in the special ponds,

- creation of network of observation boreholes and acquisition of equipment for mercury monitoring to be done.    

These technical decisions were amendments to the scheme of the whole demercurization project. They were chosen on the base of experience accumulated at PCP during the demercurization and lay in following:

5.1. isolation of hotspots of mercury contamination and the special evaporation ponds from groundwater impact was carried out by constructing cut-off walls made of bentonite clays which reached the basalt clay,

5.2. surface screening on contamination sites was carried out with piling and compacting bentonite types local clays on the top of the layer of clean soil,

5.3. burial of demercurization wastes and debris was planned to do at the evaporation ponds with following the ponds isolation,

5.4. isolation of filled special evaporation ponds from atmosphere was carried out by creating multi-layer cap: (i) intermediate leveling layer was consisted of materials from dismantled dams’ crests, (ii) sorption layer was consisted of ash from the power plant and served for prevention of capillary rise of water and substances dissolved in it, (iii) waterproof layer was consisted of bentonite types clay, (iv) and protection of the cap against rainfalls was provided by the layer of fertile land with vegetation,

5.5. asphalt top covering on the landfill for mercury wastes filled up with clay-concrete mixture  was designed for dusting prevention,

5.6. made decision on demercurization and construction of caps and coverings allow using these areas in future for constructions on their surface light buildings and structures without foundations and underground communications network.  

 

 

Fig.24. Construction of anti-filtration screen, so called cut-off wall around the building 31

 

 

Fig.25. Bucket (grifer) of hydraulic excavator “ЭО-522А

 

 

Fig.26. Construction of anti-filtration screen, so called cut-off wall around mercury waste lagoons

 

 

Fig.27. Creation of clay covering above the concrete foundation of the building 31

 

 

Fig.28. Piling mercury contaminated building structures into the first compartment of landfill

 

 

Fig.29. Piling mercury contaminated building structures into the third compartment of landfill

 

 

Fig.30. Filling in the first compartment of the landfill with ground-concrete mixture

 

 

Fig.31. Landfill for mercury waste within the Industrial site #1

 

 6. Completion of first Phase of chlor-alkali production demercurization program of 2002 – 2004 /62/

 

In 2002-2004 Building #31 was dismantled as well as Buildings 34, 34a, 34b (only concrete floors of these shops were kept) and tanks of  Shop # 34b and 6th pumping station; Buildings 37, 36, 36b, 31d, 109 and water recycling communications were decontaminated; infrastructure objects including overpasses and rail and auto ways were either carried to different places or dismantled; cut-off wall 0.6 m wide and 9-20 m deep made of benthonic clay was constructed around four main hotspots of mercury contamination so that it was 1 m deepened into the basalt clay. Cut off wall was being dug with special excavators (fig. 24-26) by digging the trench under the protection of bentonite solution followed by its filling with clods of bentonite type’s clay. Its total length is 3588 m, including around the Building # 31 – 699 m (19-20 m deep), around shops 31a, 34 and 40 - 185 m (19-20 m deep), around 6th pumping station – 240 m (11-12 m deep), around the special evaporation ponds for mercury wastes – 2464 m (9-12 m deep). Soil contaminated only from the surface was excavated down to the depth to 0.4 m and removed in the special evaporation ponds to be buried. Instead the removed topsoil bentonite type’s clay layer 0.2-0.4 m thick was put there (fig. 27), which produced the clay screen with area of 31180 m2. Special evaporation ponds were covered with four-layer screen (leveling part, loam – 20 cm, clay – 15 cm, ground-humus mixture – 20cm) with the area of 180000 m2. Sides of the special ponds were cut in such a way that isolation screen could have a form of three trough–shaped basins where the atmosphere humidity can accumulate as much as needed for a turf formation on the surface in arid climate. Mercury contaminated building structures of the dismantled shop #3 were put (fig. 28-29) in the prepared pit-landfill (with depth of 2.0-3.8 m), the bottom of which was lined with 0.5 m thick anti-filtration screen, and then filled up with ground-cement solution (fig. 30). The structures placed into the pit-landfill formed a concrete monolith which from top was covered with clay-concrete mixture of 0.5 m thick and then with asphalt covering of 6 cm thick. Such burial site of mercury wastes had the following dimensions: 102х155 m including slopes and the total area of 15671 m2 (fig. 30).

For three years the works 860 millions tenge were spent, including 295 millions tenge - in 2002, 242 millions tenge – in 2003 and 323 millions tenge - in 2004. Totally since May 1996 till December 2004 10867.97 thousands tenge were spent in reference prices of 1991 (about $15 millions) which was 1082.56 millions tenge in established prices. After the demercurization program completion the implemented works were approved by State Expert Commission.

State Expert Commission noticed that grounds for making all technical solutions was the results of the special high quality studies and the most efficient integrated decisions were chosen among various possible variants. It was also emphasized that such decontamination project was the first to be implemented throughout the former Soviet Union and it was unique /63/.

 

7.   Program of post-demercurization monitoring in Northern industrial area of Pavlodar

 

7.1. Development of the Program of post-demercurization monitoring for 2005–2020 /57/  

 

Program of post-demercurization monitoring in the Northern industrial area of Pavlodar (Annex C) was developed by AIPET in 2004 in compliance with agreement between PCP and AIPET. Necessity of its development was justified by the fact that the mercury contamination hotspots were isolated and not removed. In such conditions the mercury monitoring became the main means of information receiving for decisions making.    

The main goals of Program of the mercury monitoring were (i) determination of levels of mercury content in various environmental objects (atmosphere, soil, surface water and groundwater) which remained after implementation of the Program of demercurization of chlor-alkali production at PCP,  (ii) control over these levels changes during 15-year period, and (iii) confirmation of acceptable level of risk posed from the residual mercury contamination for public health, including population of northern suburb of Pavlodar and people working on the territory of PCP.

Field studies and computer simulation carried out in the framework of the “Toxicmanagement” project in 2001-2002 /55/ have shown that the major risks caused by mercury contamination in area of PCP were connected with mercury contamination of groundwater and surface water as well as with evaporation of mercury on sites of the most intense contamination of soils.

As a result of implementation of the Program of demercurization the risk caused by pollution of atmosphere by mercury should be completely eliminated. Entering of mercury to natural water will also be stopped that in turn will lead to their gradual self-cleaning and reduction of the risk related to the mercury contamination of groundwater and surface water. One should expect keeping some level of mercury contamination of soil in area of PCP however the area of this contamination is not expected to spread further. Therefore the monitoring of mercury contamination in the area of PCP should include the following components:

- control over exceeding of MPCgm for gaseous mercury equal to 300 ng/m3, in near-eath atmospheric layer (1 m) at the industrial site #1 of PCP;

-control over exceeding of MPCs for total Hg, equal to 2.1 mg/kg in the soil layer covering mercury landfills;

- control over absence of spread of mercury pollution in soils with Hg exceeding MPCs for total Hg equal to 2.1 mg/kg outside of original mercury aureoles (including at the cost of  evaporation of mercury contaminated groundwater) and control over absence of accumulation of mercury inside of original hotspots of the mercury contamination;

- control over absence of spread of groundwater with Hg concentration exceeding MPCw for dissolved inorganic mercury equal to 500 ng/l toward Pavlodarskoye village and the Irtysh River;

- observation over decrease in total Hg concentration in groundwater, including the groundwater within the mercury pollution plume;

- control over absence penetration of Hg dissolved into groundwater outside of cut-off wall and landfills for solid mercury wastes; and observation over level of groundwater inside of the isolated volumes;

- observation over levels of total Hg concentration in surface water of the Northern industrial area of Pavlodar, including the wastewater storage pond Balkyldak;

- observation over levels of total Hg concentration in fish of wastewater storage pond Balkyldak.

 To achieve these objectives the following tasks had to be solved:

-  determine the order, periodicity and methods of air, soil and water sampling for their analysis for total mercury;

- determine the order and periodicity of other field activities and measurements;

- determine the methods of chemical analyses for total mercury in samples and order of laboratory works;   

- develop recommendations on the obtained results interpretation;

- determine resources needed for the mercury monitoring.

 

The results of suggested Program of mercury monitoring should answer the question whether the demercurization activities of 2001-2004 at the area of PCP were sufficient. In case of decease in the residual mercury contamination to the level of acceptable risk the Program of mercury monitoring can be completed in 2020. In case of detection of increase in risk for the environment and public health due to increase in mercury concentrations in soil, surface water and groundwater as well as in case of detection of atmospheric contamination with gaseous mercury it will be necessary to consider the additional measures on clean-up of this territory from mercury or its engineered protection at any stage of the Program of mercury monitoring. 

 

7.2. Field study in the Northern industrial area of Pavlodar in September 2004 in the framework of EU 6FP NMP2-CT-2004-505561 “BIOMERCURY” project

 

In September 2004 AIPET and PCP undertook a joint field and chemical-analytical studies in the Northern industrial area of Pavlodar to determine mercury concentration at the final stage of demercurization project within the area of future post-demercurization monitoring. The research was funded via EU 6FP “BIOMERCURY” project /64/ and from resources allocated for demercurization of chlor-alkali production /57/.  36 new monitoring boreholes were investigated which were drilled in autumn 2003 as well as 49 old boreholes designated for investigation by the Program of demercurization. 6 samples of surface water, 11 samples of soil, 15 samples of air, 4 samples of fish from wastewater storage pond Balkyldak were taken.

Comparison of the data of 2004 (fig. 32) and one received on “Toxicmanagement” project in 2001-2002 showed that as a result of man-caused intervention in hydro-geological conditions at the area of mercury hotspots in 2003-2004 some local changes in mercury concentration in groundwater within the contamination plume have happened.

In some cases when a borehole happened to locate in the site surrounded by a cut-off wall concentration of mercury could go up drastically, for example 100 times increase in mercury concentration was found for the borehole P3. The same happened for the boreholes located in the site of ruined sewage communications, for example 10 times increase in mercury concentration was found for the borehole 87-02, and double one - for borehole B21a. At the same time the boreholes located in the immediate vicinity to cut-off wall showed decrease in mercury concentration there, for example, double decrease in mercury concentration was found for the boreholes 566-00 and 567-00. For the most boreholes located quite far from the area of demercurization works the change in concentration level in groundwater did not happen.

Study of new boreholes drilled in 2003 proved the high level of mercury concentration in groundwater within earlier found hotspots, especially near the special evaporation ponds. Besides one more hotspot was found in the site of former mercury sewage system connecting the industrial site #1 and the special evaporation ponds.

Levels of mercury concentration in the surface water in the area of demercurization works increased significantly, including ones in shoaling water along south-west shore of the wastewater storage pond Balkyldak. It came from the relocation of great volumes of dust-forming mercury contaminated soil.   

Levels of mercury concentration in soils in the area of demercurization works remained considerably high, which probably was accounted for non-completed activity at the moment of sampling.  The same places where soils were heavily contaminated by mercury were the main sources of mercury entering to atmosphere. Levels of soil mercury contamination outside the mercury hotspots (for example westward from Central Laboratory) remained insignificant.    

 

 

Fig.32 Results of mercury monitoring campaign in Northern Industrial Area of Pavlodar (September2004)

 

 It turned out that in September 2004 it was hard to estimate a long-term impact of the demercurization works on environment in the area of PCP due to the incompleteness of this works that time. One can notice local short-term increase in level of mercury danger in the area of the works caused by dust forming and mercury emissions from the experimental thermal plant for treatment of mercury containing construction waste (fig. 22). That increased risk for the workers involved in demercurization works.  The field study of 2004 showed that it is necessary to expand considerably the scope of further monitoring works because during demercurization great volumes of  mercury contaminated dust forming soil were relocated which probably could lead to expansion of the contaminated area. 

 

7.3. Project proposal preparation in the framework of International Science and Technology Center

 

Pavlodar territorial environmental department planned to allot 5 million tenge from the oblast environmental fund for the first Phase of Program of post-demercurization monitoring. This is minimal sum required for such sort of works to be carried out by local up-to-date accredited chemical-analytical laboratory. However at present there is no such laboratory in Pavlodar.  Laboratories remained since the soviet time have out-of-date worn out equipment and minimal staff which is predominately pensioners who can live on low salary due to having additional income. Establishment of up-to-date environmental monitoring laboratory requires investments. ISTC and the USA Government have an idea to create such laboratory in Pavlodar to engage scientists and engineers – former employees of PCP, who have expertise in chemical weapon production.  These specialists pose a threat to the world community in case of their being unemployed.

AIPET, Pavlodar State University (PSU), IHH, SLM and PCP worked out a project proposal (see Annex D) the purposes of which were:

            - to identify the risk associated with the spread of groundwater plumes contaminated with mercury and oil derivates, including their movement through the network of water intake boreholes in village Pavlodarskoye, and further towards river Irtysh and/or their rise onto the pastures and, if significant, identify a management strategy to contain risk;

- to identify a management strategy for containing the environmental risk, caused by the mercury pollution of lake Balkyldak, including the pathway of pollutants bioaccumulation via food chains.

Project objectives:

·       study of the movement of mercury in the groundwater rise in depressed area in saturated and unsaturated zones and its accumulation in the shallow ponds and vegetation. Development of management strategy to contain the risk to population in the vicinity and livestock;

·         facilitation of the Laboratory of environmental protection of PCP with the equipment for

conduction of mercury monitoring, and training of the local staff;

·         carrying out 3-year post-containment monitoring program in the Northern industrial area of Pavlodar, including the monitoring of soils and vegetation of pastures in the close vicinity of contamination, and development of recommendations for the further implementation of the monitoring program;

·         assessment of possibility for mercury-polluted groundwater flow to change its direction; study

of interaction of contaminated groundwater with bearing strata and underlying aquifers;

·         upgrading and detailing the models of groundwater in the Northern industrial area of Pavlodar

and contamination of groundwater with mercury;

·         investigation of the possible connection in the aureole of mercury pollution between the

groundwater of Low-Medium Pliocene deposits of Pavlodar assise and groundwater of Oligocene deposits of Nekrassovskaya suite;

·         definition of more accurately prognoses for spread of mercury-containing groundwater in

Northern industrial area of Pavlodar taking into account adsorption/desorption of mercury on bearing strata of aquifers and on surface of basalt clay;

·       study of the spread of groundwater plume contaminated with oil products from the territory of POR; development of model and assessment of environmental risk posed by oil-products contamination of groundwater in the Northern  industrial area of Pavlodar;

·         facilitation of the Laboratory of environmental protection of PCP with the equipment to

monitor contamination of groundwater with oil products, and training of the local staff;

·       drilling and equipping new observation boreholes for groundwater sampling and their chemical analyses in order to define the direction of spreading the plume of groundwater contaminated with oil and petroleum derivates;

·       development of the model of spreading the oil products with groundwater in Northern industrial area of Pavlodar;

·       assessment of possibility to contain the risk posed by mercury pollution of the pond Balkyldak including the fish within it;

·       study of the mercury contamination of bottom sediments in the pond Balkyldak, and estimation of the amount of deposited mercury;

·         study of the food chains of the pond Balkyldak and to assessment of the bioaccumulation of

mercury in aqueous organisms;

·       development and discussion with local stakeholders the recommendations for the second Phase of demercurization and other remediation activities in the Northern industrial area of Pavlodar in the area of PCP, including the recommendations for abolishment or further safe use of the wastewater storage pond Balkyldak.

One of the most important objectives of the works to be implemented was the creation of monitoring laboratory PCP capable to carry out the Program of post-demercurization monitoring in the Northern industrial area of Pavlodar in 2005–2020. This laboratory together with AIPET will carry out the first stage of monitoring studies of the mercury contamination. The monitoring of groundwater contamination with oil and oil derivates will be conducted by SLM in cooperation with PCP. PSU together with AIPET will carry out the study of mercury contamination of bottom sediments and biota from wastewater storage pond Balkyldak. AIPET together with IHH will make the risk assessment posed by residual mercury contamination on the territory of PCP and around it, as well as assessment of risk from groundwater contamination by oil products. IHH will also upgrade the groundwater model for the Northern industrial area of Pavlodar and make it more accurate. This will allow making proposals to manage the contamination of groundwater by mercury and oil derivates. Suggestions for risk management in Northern outskirts of Pavlodar will be drawn up and discussed with local stakeholders and state authorities. This will include possible implementation of the second Phase of PCP demercurization and/or brining wastewater storage pond Balkyldak to safe conditions.

Project proposal was discussed in ISTC in October 2004, approved by a collaborator and American partners, as well as by the Government of the Republic of Kazakhstan and received funding from US EPA since October 1, 2005 as ISTC K-1240p project.

 

Conclusion

 

Experience of demercurisation works in Pavlodar in 1988-2004, the first Phase of which was completed in January 2005 allows some general conclusions to be drawn important for planning other new environmental projects in Kazakhstan and in the other territory of the former USSR:  

- research activity should start as early as possible desirably while a plant-pollutant still in operation. This will enable to get an access to archival documents at the given enterprise and consulting with the specialists and veterans familiar with details of technological process and its history. Otherwise the most part of technological and historical information becomes hardly accessible;

- operating enterprises, even almost bankrupts can provide funding for urgent measures such as monitoring, risk assessment, development of designs of clean-up, dismantle of production equipment and buildings, restoration of the territory. These works in turn can bring additional funding, privileges and assistance in their activity not related to environmental pollution including their reconstruction, conversion and provides workers and engineers of those productions with new employment;

- suppression and hiding of environmental problems does not bring to their solving, on the contrary it brings to the crisis increase and sooner or later the problems get out of hand. At that the problems solution at later stages will cost much higher. Open discussion of environmental problems and of the course of implementation of environment protection works attract new partners who come always with new ideas and frequently with new possibilities for funding. Mass media and public are very useful tools for solving many difficult tasks of environmental projects;

-  environmental projects are usually very complicated and require partial execution. After each phase implementation a new monitoring and risk assessment are required. Such method of the works fulfillment allows saving substantial financial resources, labor and time;

- the most difficult and important stage of environmental projects is negotiations, coordination and approving. Such stages are usually several because achieved agreements have to be reviewed and corrected in the course of projects’ implementation;

environmental projects are usually very expensive. It is important to find and have a few sources of funding. As a rule participation of ones donors gives opportunity to attract additional funds from other ones.

 

Abbreviation expansion

 

AIPET – Almaty Institute of power Engineering and Telecommunications

AAS - atomic absorptive spectrophotometer Lyumex RA 915+ (Russia)

BG – [BG Group] BG Company, Great Britain

EIA - Environmental Impact Assessment

ЕРА  [US EPA] Environmental Protection Agency, USA

fig. – figure

FS - Feasibility Study

GDR German Democratic Republic

GeoDelf - Consulting Company "GeoDelf", Netherlands

GIS - Geographic Information System

GPS – Global Positioning System

IHH - Institute of Hydrogeology and Hydrophysics, Ministry of Science and Education, RK, Almaty

IMV – Institute of Microbiology and Virology of Ministry of Education and Science, RK,

INCO – Specific International Scientific Cooperation Activities

INS – Institute of Natural Science, Almaty

INTAS – International Association for the Promotion of Co-operation with Scientists from the NIS

ISTC – International Science of Technology Center

JSC – Joint Stock Campony

JV “Evrohim” - joint venture “Evrohim”, Kiev

KazGU - Research Institute of New Technologies and Materials at Al-Farabi Kazakh state National University, Almaty

KNIIF GOSNIICHLORPROEKT – Kiev Research Branch of State Research Institute “ChlorProject”

KNIF MNPO “Sintez” -  Kiev Research Branch of International Research Association “Sintez”

KNII “Sinteko” - Kiev Research Institute “Sinteko”

Ltd. – company with limited liability

MNREP RK - Ministry of National Resources and Environmental Protection of the Republic of Kazakhstan

MPCda - Maximum permissible concentration in air daily average, equal to 300 ng/m3 for mercury

MPCw - Maximum permissible concentration in water of a water body equal to 500 ng/L for mercury

MPCf  - Maximum permissible concentration in fish: 0.6 mg/kg for mercury in predatory fishes and 0.3 mg/kg for mercury in non predatory fishes

MPCs - Maximum permissible concentration in soil equal to 2.1 mg/kg for mercury

MPCwa - Maximum permissible concentration in air of working area equal to 10000 ng/m3 for mercury

NGO – Non-Governmental Organization

NII- Research Institute

NIS - New Independent States

PCP – Pavlodar Chemical Plant

pH – hydrogen ion exponent (characteristic of acidity and alkalinity of aqueous solution)

PHH - Pavlodar Hydrogeological Expedition – Science and Technology Centre “Technolog”

Almaty

PO – Production Association

Pond Balkyldak (Balkyldak) – wastewater storage pond (former natural lake) Balkyldak

POR – Pavlodar Oil Refinery

PSU - Pavlodar State University

QA/QC –Quality assurance and quality control

Red-ox potential – reduction–oxidation potential in a solution

RF – Russian Federation

RK – the Republic of Kazakhstan

SLM - Stepnogorsk Laboratory of Monitoring

Special ponds - special evaporation ponds for liquid mercury containing wastes (they also were used as a storage for solid mercury containing wastes)

SSEU - Siberian Spiritual-Ecological University, Omsk, Russia

SU - Department of Civil Engineering of Southampton University, Great Britain

TES - urban power station generating also steam for heating.

USAUnited States of America

USSR – Union of Soviet Socialist Republic

 

Reference

 

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17. V.A.Skripnik, V.I.Barmashenko, M.N.Korshun. Recommendations on demercurization of equipment and burial of wastes from chlorine and caustic soda production based on mercury method at PCP. KNIF GosNIIKHLORPROYEKT, Kiev, 1989, 41 p.

18. L.E.Postlov, I.I.Drel. Report on the project “Development of wasteless processes of wastewater and gas emissions treatment from mercury, technology of mercury removal from soil of industrial sites of mercury electrolysis. Pilot trials of the process”. KNIF GosNIIKHLORPROYEKT, Kiev, 1990.

19. V.I.Skripnik, A.A.Uzbekov. Initial data and recommendations on elimination of mercury contamination of soils in industrial site of chlorine and caustic soda production based on mercury method at PCP. KNIF MNPO “Sintez”, Kiev, 1991, 43 p.

20. A.A.Uzbekov, A.Yu.Noel, V.P.Zolin. Recommendations for environmental protection against mercury contamination. KNII “Cinteko”. Kiev, 1992, 22 p.

21. V.V.Sokolov, V.S.Mochulskiy, V.V.Kuznetsov. Main regulations for demercurization of equipment and building structures, elimination of soil’s mercury contamination of the territory of the shop #31 at PO Khimprom, Pavlodar. Institute Giprosintez, Volgograd, 1992, 10 p.

22. L.E.Postolov. Initial data for design of the process of neutralization and burial of mercury containing materials at PO Khimprom, Pavlodar during demercurization works. JV “Evrohim”, Kiev, 1995, 31 p.

23. Report on the project “Development of concrete mixture composition, way of its preparation and placement into cells of storages with selection of compositions and testing samples of fine-grained ground-concrete based on Portland cement as astringent”. Kiev State University of Construction and Architecture, Kiev, 1995.

24. E.N.Lushin. Preliminary conclusion on the results of study for identification of landfill for mercury containing materials at the industrial site of PCP. JSV “Pavlodargidrogeologia”, Zhetekshi. 1995.

25. L.E.Postolov, I.I.Drel. Demercurization of decommissioned production of chlorine and caustic soda. Working design. General explanatory paper. JV “Evrohim”, Kiev, 1995, 89 p.

26. Protocol of the meeting of MNREP RK with the BRGM representative Georges Morisot (France), Kokshetau, 03.08.1999. 2 p.

27. Protocol of the BRGM meeting “Demercurization project in Pavlodar: EIA and elimination of the contamination hotspots”, Pavlodar, 24.04.2000. 3 p.

28. Protocol on financing between French Republic Government and the Government of the Republic of Kazakhstan. 05.10.2000. 4 p.

29. Protocol of talks on realization of the project “Demercurization activity and identification of mercury contamination hotspot in Pavlodar”, Kokshetau, 10.11.2000. MNREP RK. 3 p.

30. A.B.Freiberg, Acting Chairman of Committee for Environment Protection in MNREP RK. Assignment for development of FS “Demercurization activity and elimination of mercury contamination hotspot in Pavlodar”. 16.11.2000. 2 p.

31. A.D.Akhmetov, Director on construction of PCP, Comparative chart of proposals on elimination of mercury contamination hotspot at JSC “PCP”, developed by JV Evrohim and French Company BRGM. 2001. 3 p.

32. Letter of JSC “PCP” President E.M.Nurpeisov, Chief Engineer L.K.Shchetinin, Director on Construction A.D.Akhmetov to Akim of Pavlodar oblast G.B.Zhakiyanov  N 71-05-96 of 26.01.2001. 2 p.

33. Program of demercurization of decommissioned production of chlorine and caustic soda based on mercury method at JSC “Khimprom”.  Pavlodar JSC “Khimprom”, Pavlodar, 1998. 15 p.

34. L.K.Polezhayev (Governor of Omsk oblast, RF). Letter to RF Government Chairman Mr. S.V. Stepashin N 1-01/217 of 23.06.99. 2 p.

35. Yu.V.Knyazev (Head of Industrial Laboratory of Sanitary Epidemiological Agency of Pavlodar. Sanitary order No. 2б-08-147 of 17.08.98. 1 p.

36. V.I.Lyagushnikov, V.N.Kvashnin, N.A.Parfenov, S.N.Sultanbayev, M.Sh,Akhmetov, D.G.Tashimova. Act of collection and acceptance of 3993 kg of metal mercury to the storage #9. 23.11.1998. 1 p.

37. V.Keremkulov (Chairman of the Committee for the Environmental Protection, Chief State Inspector of RK). Letter  N 1/353 of 22.04.99 to A.G. Siryk, a President of JSC “Khimprom” 2 p.

38. V. G.Gurdzhei, P.A.Dubok, V.I.Tereshkov, B.K.Serzhanov, N.M.Khlystun. Protocol of the meeting of representatives of committees, authority of Omsk and Pavlodar oblast administrations on the problem of the Irtysh River mercury pollution . Pavlodar, April 28, 2000. 6 p.

39. A.G.Siryk, L.K.Shchetinin, A.D.Akhmetov, E.P.Serenyuk, S,Yu.Sokol, A.V.Kasyanenko, K.V.Khortsev. Protocol of technical meeting of JSC “PCP” on demercurization of dismantled equipment of Shop # 31. Pavlodar, 3.05.1999.1 p.

40. N.Leontyev  (Deputy Head of Pavlodar oblast environmental department). Decision of state expertise on the temporal storage of mercury decomposers in the cell #1 of screened special evaporation ponds. Letter to JSC “PCP” N1/431 of 19.05.1999. 2 p.

41. A.V.Ryumin (First Deputy Oblast Akim). Assignment of Oblast Akim G.B. Zhakiyanov while visiting JSC “PCP” in May 18, 1999.1p.

42. K.Aitekenov (Chairman of Committee for Environmental Protection of RK) Chronology of the demercurization project “Demercurization activity and elimination of mercury contamination hotspot in Pavlodar” implementation in Pavlodar. (Note to Vise Prim Minister, Ministry of Finance RK  A.S. Pavlov). 23.02.2002. 6 p.

43. E.Trusov (Director of Pavlodar oblst of Environmental Fund), A. Akhmetov (Director on construction at PCP). Information on implemented demercurization activities at decommissioned production of chlorine and caustic soda based on mercury method at JSC “PCP”. 2002. 1 p.

44. Control of groundwater protection from depletion and pollution in Pavlodar oblast for 1986-1987. In two books. PHH, Zetekshi, 1988. Book 1, 84 p.

45. Water regime and balance of groundwater in Pavlodar oblast. Report of hydro-geological party on the results of hydro-geological study in Pavlodar oblast in 1988-1991. In 9 books and 2 files. PHH, Zetekshi , 1991. Book 1, 233 p.

46. Annual journal on water regime and balance of groundwater in Pavlodar oblast for 1992-1993.  In 2 books and 1 file. PHH, Zetekshi, 1993. Book 1, 48 p.

47. Identification of contamination sources in the vicinity of the lake Muyaldy in 1990-1991.  Hydro-geological agency «Kazgeokaptiazhminvod”. Almaty, 1992. 40 p.

48. M. Sh.Ishankulov, A.D.Saltybayev. Report “Snow cover contamination in Pavlodar and its vicinity with chemicals”. Health Center of Ministry of Health, RK. Almaty, 1991. 5 p.

49. M.Sh..Ishankulov, A.D.Saltybayev. Report “Study of present status of man-made contamination of soil, drinking water, vegetation and food products in Pavlodar”. Health Center of Ministry of Health, RK. Almaty,  1992. 7 p.

50. M.A.Ilyushchenko. Report (final) on research in the framework of fundamental study “Development of atomic-absorption methods of mercury determination and forms of its occurrence in environmental objects and assessment of mercury man-made geo-chemical anomalies extend in Central and Northeast Kazakhstan. KazGU, Almaty, 1996. 102 p.

51. A.D.Saltybayev. Geochemical peculiarities of system “ambient air – soil – groundwater – vegetation” in the condition of industrial contamination of Pavlodar.  Abstract of PhD thesis. Almaty 1995. 23 p.

52. N.M.Khlystun. Ecologo-chemical study of nature environments condition in Pavlodar – Ekibastus regional industrial complex. Abstract of PhD thesis. Almaty 1999. 28 p. 

53. T.I.Slazhneva. Environmental Impact Assessment (EIA) of PO “Khimprom”, Pavlodar. Health Protection Centre, Ministry of Health RK. Almaty, 1992, 433 p.

54. I.M.Kamberov, M.I.Politikov. Report on the project INTAS-Kz 95-19 “Study of environment around Pavlodar” for 1997-1999. Almaty, Dublin 1999. 50 p.

55.  T.W.Tanton, S.M.Ullrich, G.Zh.Daukeev, M.A.Ilyushchenko, E.V.Lapshin, V.V.Veselov, V.Yu.Panichkin, I.M.Kamberov. Results of researches on mercury contamination in the north industrial area of Pavlodar and proposals on its demercurization. Proceedings of Ш International scientific conference “Heavy metals, radionuclides and biophilic elements in an environment  (Semipalatinsk , 7-9 October 2004.)”. Semipalatinst State Pedagogical University. Semipalatinsk 2004. V.1. p. 72-77.

56.  T.W.Tanton, V.V.Veselov, M.A.Ilyushchenko, V.Yu.Panichkin. Assessment of risk posed by mercury contamination in the Northrn industrial area of Pavlodar. Reports to the National Academy of Sciences, RK. N4, 2003, p.78-81.

57. M.A.Ilyushchenko. Report on Agreement  N134 (US 37/2003n) of 21.08.2003 «Development of mercury monitoring program in the Northern industrial area of Pavlodar” AIPET, Almaty 2004. 37 p.

58. L.E.Postolov, I.I.Drel. Demercurization of decommissioned chlorine and caustic soda production based on mercury method. Correction of Working Design. General explanatory note. JV Evrohim, Kiev, 2003, 71 p.

59. L.E.Postolov, I.IDrel. Technical decisions on burial of mercury containing wastes in compliance with Working Design (1995) and correction of Working Design (2003) “Demercurization of decommissioned chlorine and caustic soda production based on mercury method at JSC “PCP”.  JV Evrohim, Kiev. 2004. 15 p.

60. A.D.Akhmetov, L.E.Postolov, M.A.Ilyushchenko. “Assignment on development of correction of Working Design “Demercurization of decommissioned chlorine and caustic soda production”. 2003. 2 p.

61. A.Verbnyak, V.Bednenko, G.Voronin, A.Akhmetov, L.Postolov. Protocol of the meeting with V. Bednenko, Head of Pavlodar Oblast Environmental Territorial Authority on Environmental Protection devoted to correction of the project of demercurization at JSC “PCP”. July 23, 2003. 2 p.

62. N. K.Autalipov, I.I.Drel, E.K.Nacharova, A.D.Akhmetov, N.V.Solovyova, G.S.Manyakhin, B.A.Sardarov, V.A.Migachov, K.Zh.Beisebayev, A.M.Karabalin, B.K.Shapkenov, S.K.Matviyenko, Zh.A.Usenov, A.Zh.Bikenov.  Conclusion of working commission (assigned by the order of the Department of Environmental Programms of Pavlodar oblast, N21 of 16.11.2004) about receiving the object ready in order to be presented to the State Acceptance Inspection. December 7, 2004. Pavlodar,6 p.

63. Zh.Zh.Nurgaliyev, I.I.Drel, S.S.Abeldinov, E.V.Skarov, V.A.Bednenko, S.A.Adamzhanov, Zh.Sh.Aliyev, T.K.Kamashev, B.K.Shapkenov, A.D.Akhmetov. Act of State Acceptance Inspection (assigned by Akim of Pavlodar oblast decision N27 of 29.11.2004) on acceptance of constructed object and its commissioning of December 25, 2004.  Approved by the oblast Akim decision of February 28, 2005. Pavlodar, 5 c.

64. Worldwide remediation of mercury hazards through biotechnology (BIOMERCURY). http://www.biomercury.de.

  

 

ANNEXES

 

 

 

 

Annex А

 

L.E. Postolov

   Chlor-alkali production with mercury cathode within the former USSR (as of 2008)  

     

  

 Enterprises

(in parentheses - names of soviet period)

Annual capacity

of caustic

(thousand tons)

Wastewater treatment

method

   Mercury

consumption rate,

g/t of caustic 

OPERATING ENTERPRISES

1.  JSC "Kaustic" Volgograd city, Russia. The year of mercury electrolysis production start-up - 1968

120

precipitation as sulfide

600-700

2.  JSC "Kaustic" Sterlitamal city, Bashkortostan, Russia. The year of mercury electrolysis production start-up with use of “Krebs” bathes - 1964, the year of shutdown - 1987. Facilities and buildings have been demercurized, wastes rich in mercury were sent to Nikitovskiy mercury factory, wastes poor in mercury were landfilled. The year of mercury electrolysis production of doubled capacity start-up with used of “De Nora” bathes in new production premises - 1982.

150

combined: ion-exchange

 + purge

400-450

3.  Surface-active substances factory, Sumgait city (PO "Khimprom"), Azerbaijan. The year of the first mercury electrolysis production start-up – 1956, the year of shutdown - 1981, facilities and electrolysis shop have been demounted, mechanically cleaned from mercury and utilized; wastes rich in mercury were sent to Nikitovskiy mercury factory, wastes poor in mercury as well as debris of floor slab and soil down to 2 m deep from under the shop were landfilled. The year of the second production of the same capacity (new electrolysis building was constructed next to the old one and all infrastructure has been kept) start-up - 1982

70

ion-exchange

600-700

4.  JSC Kirovo-Chepetskiy Chemical factory. Kirovo-Chepetsk, Kirovskaya oblast, Russia. The year of mercury electrolysis production start-up - 1955

200

combined:

precipitation as sulfide

 + ion-exchange

300

STOPPED ENTERPRISES

5. Factory of chemical concentrates, Novosibirsk city, Russia. The year of mercury electrolysis production shutdown - 2006. Facilities and buildings have been demercurized, new chlor-alkali production of smaller capacity based on a membrane method is being set up in the same production premises.

200

ion-exchange

300

6.  JSC “Sayanskkhimplast”, Sayansk city (Ziminskiy Chemical Plant), Irkutskaya oblast, Russia. The year of mercury electrolysis production start-up - 1979, the year of shutdown - 2006. Facilities and buildings have been demercurized, new chlor-alkali production of smaller capacity based on a membrane method operates in the same production premises.

150

Combined: ion-exchange

 + evaporation

600-700

7.  JSC “Usolyekhimprom”, Usolye Sibirskoe city, Irkutskaya oblast, Russia. The year of mercury electrolysis production start-up - 1970, the year of shutdown – 1998. The production is being closed down. Design of demercurization of buildings and the territory has been prepared.

110

precipitation as sulfide

600-700

8.  JSC “Radikal”, Kiev city (Chemicals Plant), Ukraine. The year of mercury electrolysis production start-up - 1954, the year of shutdown - 1996. The production has been closed down. Facilities have been demounted. Feasibility study of a design of demercurization of buildings and the territory has been prepared. 

60

ion-exchange

600-700

9.  JSC “Kaustik”, Pavlodar city (PO Khimprom), Kazakhstan. The year of mercury electrolysis production start-up - 1975, the year of shutdown - 1993. Facilities, buildings (have been demounted) as well as territory (partially) has been demercurized; new chlor-alkali production of smaller capacity based on a membrane method is being set up in other production premises.

120

ion-exchange

1500

 

Besides mercury plants of small capacity operated at:  PO “Kaprolaktam”, Dzerzhinsk town, Nizhegorodskaya oblast (start-up – 1948, shutdown – 1982) – 10 000 tons/year, and also Arkhangelskiy, Novodvinsk town, Arkhangelskaya oblast (start-up – 1962, shutdown – 1996) – 16400 tons/year, Svetogorskiy, Svetogorsk town, Leningradskaya oblast (start-up – 1951, shutdown – 1993) – 1300 tons/year, Kotlasskiy, Koryazhma town, Arkhangelskaya oblast (start-up – 1964, shutdown – 1998) – 19600 tons/year, and Amurskiy, Komsomolsk-na-Amure city, Khabarovskiy kray (start-up – 1970, shutdown – 1997) – 7400 tons/year pulp and paper milks.  Wastewater treatment method used there is precipitation as sulfide. Kotlasskiy plant was demounted and utilized, buildings were demercurized, mercury wastes and heavily contaminated facilities were landfilled; at present chlor-alkali production of the same capacity operates based on a membrane method. Information on demercurization at the other productions is not available. 

  

 

Annex B

Press-release of 15.11.04

 

Construction of anti–filtration screen around mercury contamination hotspots in North industrial area of Pavlodar has been completed 

 

The Phase I of the unique project, confining spread of mercury pollution in Pavlodar North industrial zone is under completion. It limits mercury impact on environment and population. The project, which was funded at the cost of the Republican budget, has prevented the mercury contamination of both the Irtysh River and groundwater. Process of the project implementation had been discussed repeatedly in all levels of Russian-Kazakhstani meetings and negotiations. To assess the sufficiency and effectiveness of demercurization works done at former Pavlodar Chemical Plant the Program of Mercury Monitoring till 2020 was developed.   The Pavlodar oblast draft of budget for 2005 includes funding the inception of monitoring activity. Several new projects of mercury contamination impact study were prepared as well as pilot tests of new bio-technology for groundwater clean – up. The US Government showed its interest in funding these projects.  

Chlor-alkali production in Pavlodar Chemical Plant released 1310 tons of metal mercury and mercury compounds to environment during manufacturing process. This mercury was accumulated both under the concrete floor of electrolysis shop and surrounding industrial site and spread with wind from the area of mercury wastes storage and penetrated into groundwater and went to surface water either. Mercury evaporation threatened plant employees’ health as well as mercury contaminated groundwater threatened health of Pavlodarskoye village population where the groundwater was used as main water resources. With the start of demercurization activity (April, 1999) hot spring weather caused intensive mercury evaporation from Shop N31, which was absolutely out of control. As a result of such evaporation Pavlodar administration declared “State of Emergency” due to the real danger for population. 

Similar problems occurred in other regions of the former Soviet Union where mercury was used in manufacturing process. In the course of time those plants closed their production like what happened two years ago with “Usoliekhimprom” (East Siberia), whose chlor-alkali production was stopped because of mercury contamination of Bratsk reservoir at the Angara River. Earlier some other similar productions were stopped in Eastern and Western Europe. At that nowhere except Minamata Bay, Japan, wide scaled demercurization works have been held which could prevent the threat of mercury impact on an environment and health of population. However demercurization project in Japan have been implemented only under pressure of the public, mass media and court decision after epidemic of new disease emerged caused by mercury poisoning.  This disease has got the name of Minamata. That project took about 50 years and cost $ 2 billion. 

In Kazakhstan the attention to the mercury pollution was attracted by local administration, NGOs and local mass media. Pavlodar inherited the problem from the former Soviet Union and nobody in Kazakhstan wanted to take responsibility for this contamination and hide the real danger. The main problem in the years of economic and political crisis was to find funding to investigate the scale of the contamination and risk, develop demercurization technology and its implementation.   Prompt and first steps to cope with the problems were undertaken at the cost of plant own money and the Pavlodar oblast budget.  These works were initiated by Danial Akhmetov – Head of oblast administration, who currently is a Prime-Minister of the Republic of Kazakhstan.

Top priority measures included the collection of necessary data and materials for a design preparation, then the demercurization program development and dismantling of the main source of the contamination – electrolysis hall of the building N31. This work was being done in 1993-1999. Ukranian Institute JV “Evrohim”, Kiev held engineering investigation and developed the design of the shop N31 demercurization. The plant workers collected manually 17 tones of metal mercury and 3 tons were extracted after the thermal treatment of construction materials. Building structures of the central part of the shop N31 which contained less then 0.3% mercury were put in landfill construction of which was started at the industrial site of the chemical plant 50 meters far from the shop which was being dismantled.  Such disposition of the landfill prevented the spread of original hotspot of mercury contamination.

In 2000 all works at the area of Pavlodar Chemical Plant were stopped due to the cessation of funding. The Government of the Republic of Kazakhstan did its best to attract investments or loans from foreign companies for demercurization works.  Already in 1993 President N. Nazarbayev negotiated with Japan Government on participation of Japanese companies in the mercury contamination elimination and construction of new chlorine production in Pavlodar with no-mercury method.  In 2000 President N. Nazarbayev had similar meetings in France where he signed Agreement on soft loan receiving from France Government. This soft loan had to help in rehabilitation of the contaminated site and in collaboration with French companies, which offered technical assistance and participation in all demercurization works. However this negotiation was overextended and eventually ended in no results because French company BRGM assigned by French Government refused to hold the demercurization without protracted and expensive preliminary study.  

In 2001 Consortium of Kazakhstani and European universities with British Gas Chair of Almaty Institute of Power Engineering and Telecommunication as a leading institute received grant of EU INCO Program and held two-year research of mercury impact on an environment in Pavlodar.  This research showed there are several secondary hotspots of the contamination on the site beside the main one. Mercury washed out of these hotspots formed plume of groundwater contaminated with mercury dissolvable salts and spread 2.5 km towards the north as a narrow strip along the Irtysh River. Forecast of plume behavior made on the base of computer model by Almaty Institute of Hydrogeology and Hydrophysics showed that some changes in hydrogeological condition can result in change of this plume direction and mercury ingress to water supply wells of Pavlodarskoye village and the Irtysh River. It made scientists revise the original design of elimination of main hotspot of mercury pollution. Instead of extraction and treatment of metal mercury from concrete basement of shop N31 and soil underneath it was suggested that main mercury pollution hotspots had to be isolated from groundwater and atmosphere. Original design implementation required much funding with no effect guarantees because it was impossible to extract all mercury and then to sell the extracted mercury. Scientists suggested that mercury had to remain at the same places of its accumulation but had to be isolated with cut-off wall, which had to be constructed with conversion digging machines. This idea was considered at the Presidium of National Academy of Sciences of Kazakhstan and was recommended as a correction of the demercurization design.

In 2002-2004 four mercury pollution hotspots were isolated with bentonite clay screen of cut off wall type’s 15-20 m deep. Its total length is 3588 m including 699 m around the building N31, 185 m – around 40s buildings, 240 m - around the 6th pumping station, 2464 m - around special evaporation ponds for mercury wastes.  Soil which contamination was found only in surface layer was dug out and placed inside area confined with cut-off walls. Instead it clean soil was put on that place. From atmosphere those the pollution hotspots were isolated with clay screens with total area of 180000 m2. All buildings contaminated with mercury were dismantled and the building structures were put in the landfill. Network of underground communications contaminated with mercury were disassembled too. All the building structures put into the landfill was fill up with special cement mixture and formed a solid concrete monolith with total area of 15671 m2 – resistant to groundwater and rainfalls impact. For tree years of this work 860 million Kz Tenge will be spent, including 295 million Kz Tenge in 2002, 242 million Kz Tenge in 2003 and 262 million Kz Tenge for 10 months of 2004 from planned 323 million Kz Tenge. In compliance with schedule the remaining 61 million Kz Tenge will be spent till December, 25, 2004. After completion of the Demercurization Program all works are supposed to be accepted by State Commission.

Accomplishment of the I stage of the demercurization works at the industrial site of Pavlodar Chemical Plant was feasible due to the support of RK President, Government, Oblast Akimat and coordinated activity of international team of scientists and engineers  from Kazakhstan, Ukraine and Great Britain. It opens way to revival of chlor-alkali production in Pavlodar on the basis of new technologies which are more cost effective and environmentally appropriate.  

   

 

Annex C

 

Program of mercury contamination monitoring for 2005-2020. (Fragments)

 

1. Concept

 

Primary sources of mercury contamination resulted from 18-year operation of chlorine and alkali production of former PO “Khimprom”, Pavlodar City (1975-1993) will be eliminated or contained as a result of the Program of Demercurization being carried out in 2001-2004. Buildings of the production cycle using mercury and mercury containing solutions (## 31, 34 and 40) will be demolished and the facilities and building structures will be utilized. Underground sources of mercury contamination underneath the shops 31and 40, the 6th pumping station for special evaporation ponds for solid mercury-containing wastes will be contained with help of anti-filtration screen of cut-off wall type’s and special covering from the top. One-meter layer of the ground on sites of the most intensive mercury contamination will also be removed and a landfill will be constructed for storage of solid mercury wastes with Hg content of 0.3-1.0%.

Field studies and computer simulation carried out within the program INCO-Copernicus in 2001-2002 have shown that the major risks caused by mercury contamination in area of former PO "Khimprom" are related to the contamination of groundwater and surface water as well as to evaporation of mercury on sites of the most intense contamination of soils.

As a result of implementation of the Demercurization Program the risk caused by pollution of atmosphere by mercury should be completely eliminated. Entering of mercury to natural water will also be stopped that will lead to their gradual self-cleaning and decrease in the risk related to the mercury contamination of groundwater and surface water. One should expect keeping some level of mercury contamination of soil in area of the former PO "Khimprom", Pavlodr, aureole of this contamination, however, is not expected to spread further.

Therefore the monitoring of mercury contamination in the area of former PO "Khimprom" should include the following components:

1.1.        control over absence of exceeding Maximum Permissible Concentration for gaseous mercury (MPCgm)  equal to 300 ng/m3 in near-earth atmospheric layer (1 m) in site of the industrial area of former PO “Khimprom”;

1.2.        control over absence of exceeding of MPCs (soils) for total Hg, equal to 2.1 mg/kg in the soil layer covering the landfill for mercury wastes;

1.3.        control over absence of spread of mercury pollution in soils with Hg exceeding MPCs for total Hg (equal to 2.1 mg/kg) outside of original mercury aureoles (including the pathway by evaporation of contaminated groundwater); and control over accumulation of mercury inside of original hotspots of mercury contamination;

1.4.        control over spread of groundwater with Hg concentration exceeding MPCw (water) for dissolved inorganic mercury (equal to 500 ng/l) toward village Pavlodarskoye and the Irtysh River;

1.5.        observation over decrease in total Hg concentration in groundwater, including the groundwater within the mercury pollution plume;

1.6.        control over absence of penetration of total mercury containing in water outside of cut-off wall and landfill for solid mercury wastes; and observation over level of groundwater inside of isolated volumes;

1.7.        monitoring of levels of total Hg concentration in surface water of the Northern industrial area of Pavlodar, including the wastewater storage pond Balkyldak;

1.8.        monitoring of levels of total Hg concentration in fish of wastewater storage pond Balkyldak.

 

2. Goals and objectives of the Program of mercury monitoring

 

The main goals of Program of mercury monitoring in the Northern industrial area of Pavlodar are:

-       (i) determination of residual levels of mercury content in various environmental compartments (atmosphere, soils, surface water and groundwater), which arose as a result of implementation of Demercurization Program for chlor-alkali production of former PO “Khimprom”,

-       (ii) control over changing of these levels during 15-year period, and

-       (iii) confirmation of acceptable level of risk posed by the residual mercury contamination for public health, including population of northern suburb of Pavlodar and people working at the territory of former PO “Khimprom”.

The following tasks are proposed in order to achieve the above goals:

2.1.        establishment of procedure, frequency and techniques for the sampling of air, soils and water for the subsequent determination of total mercury content;

2.2.        establishment of procedure and frequency of other fieldworks and measurements;

2.3.        establishment of techniques for chemical-analytical determination of total mercury in taken samples as well as procedures of laboratory works;

2.4.        development of recommendations for the interpretation of obtained results;

2.5.        identification of the resources necessary for implementation of works on mercury monitoring.

 

3. Sites of mercury monitoring and data interpretation

 

Mercury monitoring includes sampling and chemical analysis of mercury in air, soils, surface and ground water and fish. Monitoring is conducted on the following sites:

3.1.        control over absence of exceeding MPCgm is carried out in 7 points, including:

3.1.1.  the sites of contamination with elementary mercury inside of the perimeter and around the former electrolysis hall of the shop #31 (4 sampling points of air on the perimeter of the cover isolating the concrete floor of the former shop #31; and 1 sampling point in the centre of this cover);

3.1.2.  the point near the thermal treatment plant for processing of mercury-containing building structures (1 sapling point of air in the close vicinity from the thermal plant or from the place of its location if this plant is dismantled); 

3.1.3.  the point above the landfill for mercury-containing materials near the former shop #31 (1 sampling point for air above the centre of the landfill);

3.2.        control over absence of exceeding MPCs for total mercury is carried out in 11 sampling points, including:

3.2.1.  the topsoil layer (0-10 cm) covering the concrete floor of the former shop #31 (1 sampling point for soil near the centre of the cover);

3.2.2.  the topsoil layer (0-10 cm) isolating the foundation of the former 6th pumping station for wastewater (1 sampling point of soil near the centre of the cover);

3.2.3.  the topsoil layer (0-10 c) covering the former special evaporation ponds for mercury wastes (3 sampling points for soils near the centers of each of three ponds);

3.2.4.  the topsoil layer (0-10 cm) inside of the industrial area of former PO “Khimprom” 200 m to the west from the shop #106 (3 sampling points of soils);

3.2.5.  the topsoil layer (0-10 cm) outside of the industrial area 400 m to the north from the former 6th pumping station for wastewater (3 sampling points of soils);

3.3.        control over absence of mercury accumulation inside of original hotspots of mercury contamination (4 sampling points in total) is carried out in topsoil layer (0-10 cm) inside of industrial area of former PO “Khimprom” between the former shops #34 and #34a (2 sampling points); and between the shops #31a and #37 (2 sampling points);

3.4.        control over absence of spread of groundwater contaminated with mercury above MPCw is carried out using 12 observation boreholes: ## 522-00, 60-02, 78-02, 55-02, 81-02, 79-02, 73-02, 70-02, 89-02, 91-02, 6-P, 5-P;

3.5.        control over decrease in Hg concentration in groundwater including the plume of mercury contamination is carried out using 52 observation boreholes: ## 69-02, 68-02, 61-02, B-21, B-21a, 84-02, 66-02, 82-02, 67-02, 83-02, 59-02, 87-02, 74-02, 88-02, 72-02, 90-02, B-22, B-23, 63-02, 7-P, 8, 62-02, 682, including the new boreholes specially drilled for Monitoring Program: ## 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 32, 33, 34, 35;

3.6.        control over absence of penetration of Hg dissolved in water outside of cut-off wall and the landfill for mercury wastes and observation over level of groundwater inside of isolated volumes are carried out using 23 observation boreholes: P-4, P-2, 566-00, 567-00, P-8, 86-02, B-13, P-7, 18?, P-1, B-12, P-6, P-3, 565-00, 85-02, B-14, 75-02, 76-02, including the new boreholes specially drilled for Monitoring Program: ## 1, 2, 3, 4, 5;

3.7.        monitoring of levels of total mercury in surface water of the Northern industrial area of Pavlodar is carried out on 14 water sampling points, including:

3.7.1.  in wastewater storage pond Balkyldak: 3 sampling points for water on the southern shore near the former special ponds for mercury wastes, and 1 sampling point on the north-west corner, 1 sampling point on the north-east corner, 1 sampling point on the northern shore (6 sampling points in total);

3.7.2.  in unfinished emergency canal Balkyldak-Irtysh: 1 sampling point for water in its eastern section and 1 sampling point in central section (2 sampling points in total);

3.7.3.  in ditches located to the South-East from the former special ponds for solid mercury wastes (2 sampling points);

3.7.4.  in oxbow-lakes located near the villages Pavlodarskoye and Shauke (4 sampling points);

3.8.        monitoring of the levels of total Hg concentration in fish from wastewater storage pond Balkyldak is carried out by analysis of 10 samples of silver crucian carp caught in the south-western part of the pond.

 With the change of mercury concentration in the air there should be no excess in MPCad for gaseous mercury equal to 300ng/m³ in any of these sampling sites.

With the change of total mercury concentration in the soil the results obtained beyond the primary hotspot should not exceed MPCs equal to 2.1 mg/kg and in the sampling points within the primary hotspot should not exceed the results obtained during the previous monitoring stages.  

When determining the total mercury concentration in the groundwater towards north and west beyond the mercury contamination plume as well as in the surface water of oxbows of the Irtysh River and not fully constructed emergency discharge canal Balkyldak-Irtysh the obtained results should not exceed MPCw for dissolved inorganic mercury equal to 500 ng/l.  Within the primary hotspot of groundwater mercury contamination and for the surface water of the pond Balkyldak and trenches located south-eastward from the former special ponds for mercury wastes the obtained results shouldn’t exceed the results of the previous monitoring stages.    

With the change of mercury concentration in fish tissue inhibiting the pond Balkyldak the obtained results shouldn’t exceed significantly (10 times and higher) the results of the previous monitoring stages. 

 

4. Field work and measurements associated with the mercury monitoring

 

When the atmospheric air is sampled and analyzed for mercury concentration its temperature should be measured and recorded at the same time. The measurement and recording of wind speed and direction is also desirable.

When the samples of surface water and groundwater are taken for subsequent determination of total Hg concentration, the temperature and pH of the water should be measured and recorded at the same time. The water levels in observation boreholes and the water level in the pond Balkyldak should be also measured and recorded during their sampling. The levels of groundwater in boreholes located inside of the area isolated by cut-off wall should not exceed the levels in the same boreholes registered during the previous stages of monitoring.

Fish caught in the pond Balkyldak should be weighted with the accuracy of ±1 g. The determination of fish age is also desirable.

 

5. Frequency

 

The frequency of the monitoring is stipulated by the rate of hydro- and geochemical processes in the site of the former PO “Khimprom” and the corresponding rate of changing the situation around the hotspots of mercury pollution.

During the first year of mercury monitoring the measurements of gaseous mercury should be carried three times per year (spring, summer and autumn) at the positive values of the air temperature. The same frequency should be applied for the measurements of mercury in groundwater of observation boreholes. The measurements of Hg concentration in soils and surface water should be carried out once a year during summer period.

Providing the improvement or maintenance of environmental situation related to the risk posed by mercury contamination, the frequency of all measurements could be reduced to one time per year for the subsequent four years. In case of deterioration of the situation the frequency of first year should be kept.

Providing the improvement of situation the frequency could be reduced to one time in five years after the initial five-year period monitoring.   

  

10. Expected results

 

The results of suggested Program of mercury monitoring should answer the question whether the demercurization activities carried out in 2001-2004 in the site of the former PO “Khimprom”, Pavlodar were sufficient. In case of decrease in the residual mercury contamination to the level of acceptable risk the Program of mercury monitoring can be terminated in 2020. In case of finding an increase in risk for the environment and public health due to increase of mercury concentrations in soil, surface water and groundwater as well as in case of detection of atmospheric contamination with gaseous mercury the additional activities should be considered for additional clean-up of this territory or its engineering protection at any stage of Program of monitoring. 

 

11. Justification

 

Justification of the Program was both the results of the research on international project INCO-2 ICA2-CT-2000-10029 “Development of cost-effective methods of minimizing risk from heavy metal pollution in industrial cities: a case study of mercury pollution in Pavlodar” (“Toxicmanagement”) implemented in 2000-2002 by consortium of two west European, one Russian, one Ukrainian and four Kazakhstani universities and institutes being coordinated by BG Chair of Environmental Technology of Almaty Institute of Power Engineering and Telecommunication and also additional studies of AIPET by request of JSC “Pavlodar Chemical Plant”

 

  

Annex D

 

Fragments of Project proposal ISTC Project K-1240p

 

 

PROJECT PROPOSAL

K-1240p

 

I. Summary Project Information

1. Project Title and Taxonomy

Full title:

Post-containment Management and Monitoring of Mercury Pollution in Site of Former PO “Khimprom” and Assessment of Environmental Risk Posed by Contamination of Groundwater and Adjacent Water Bodies of the Northern Industrial Area of Pavlodar

Short title:

Environmental Risk Assessment and Management in Pavlodar

Technology area:

ENV-MIN; ENV-WPC; ENV-MRA

Category of technology development:

Applied Research

2. Project Manager

Name:

Dr. ILYUSHCHENKO, Mikhail Alexeevich

Title:

Associate Prof., PhD

Position:

Associate Professor of BG Chair of Environmental Technology at AIPET

Street address:

126 Baytursynov Str.

City:

Almaty

Region:

 

ZIP:

480013

Country:

Kazakhstan

Tel.:

+7 3272 923454

Fax:

+7 3272 929814

E-mail:

mai@aipet.kz

3. Participating Institutions

3.1. Leading Institution

Short reference:

AIPET

Full name:

Non-profit JSC “Almaty Institute of Power Engineering and Telecommunication”

Street address:

126 Baytursynov Str.

City:

Almaty

Region:

 

ZIP:

480013

Country:

Kazakhstan

Name of Signature Authority:

Mr. DAUKEEV, Gumarbek Zhusupbekovich

Title:

Prof., Dr. Tech. Sci.

Position:

Rector

Tel.:

+7 3272 925740

Fax:

+7 3272 925057

E-mail:

aipet@aipet.kz

Governmental Agency:

Ministry of Science and Education of RK

3.2. Other Participating Institutions

Participant Institution 1

Short reference:

IHH

Full name:

Institute of Hydrogeology and Hydrophysics

Street address:

34 Valikhanova Str.

City:

Almaty

Region:

 

ZIP:

480100

Country:

Kazakhstan

Name of Signature Authority:

Mr. MAMUTOV, Timur Tynybekovich

Title:

Prof., Dr. Tech. Sci.

Position:

Deputy Head of Institute

Tel.:

+7 3272 915051

Fax:

+7 3272 918825

E-mail:

V_panichkin@mail.kz

Governmental Agency:

Ministry of Science and Education of RK

Sub-manager:

Mr. VESELOV, Vassily Vassilievich

Title:

Academician of NAS RK

Position:

Head of the Laboratory of Informatics and Hydrogeological Processes’ Modelling

Tel.:

+7 3272 914609

Fax:

+7 3272 918825

E-mail:

V_panichkin@mail.kz

Participant Institution 2

Short reference:

PCP

Full name:

JSC “Pavlodar Chemical Plant”

Street address:

1 Northern Industrial Area

City:

Pavlodar

Region:

Pavlodar oblast

ZIP:

637029

Country:

Kazakhstan

Name of Signature Authority:

Mr. BOSZHIGITOV, Sarken Kapsalyamovich

Title:

Mr.

Position:

Rehabilitation Manager

Tel.:

+7 3182 396431

Fax:

+7 3182 396436

E-mail:

oaopxz@hotmail.ru

Governmental Agency:

Dept. of Municipal Property of Pavlodar Oblast

Sub-manager:

Mr. AKHMETOV, Arthur Darazhatovich

Title:

Mr.

Position:

Head of Construction Dept.

Tel.:

+7 3182 396123

Fax:

+7 3182 396436

E-mail:

oaopxz@hotmail.ru

Participant Institution 3

Short reference:

PSU

Full name:

Pavlodar State University

Street address:

Lomov Str., 64

City:

Pavlodar

Region:

Pavlodar oblast

ZIP:

637000

Country:

Kazakhstan

Name of Signature Authority:

Mr. ARYN, Erlan Mukhtarovich

Title:

Prof., Dr. Econ. Sci.

Position:

Rector

Tel.:

+7 3182 451110

Fax:

+7 3182 451196

E-mail:

rector@psu.kz

Governmental Agency:

Ministry of Science and Education of RK

Sub-manager:

Mr. BAZARBEKOV, Kairbai Urazambekovich

Title:

Prof., Dr. Chem. Sci.

Position:

Head of Biology and Chemistry Institute of PSU

Tel.:

+7 3182 562604

Fax:

+7 3182 451196

E-mail:

dir@psu.kz

Participant Institution 4

Short reference:

BMP

Full name:

JSC “Biomedpreparat – Engineering Center”, Laboratory of Monitoring

Street address:

9th Mikroraion, building 3

City:

Stepnogorsk

Region:

Akmola oblast

ZIP:

474456

Country:

Kazakhstan

Name of Signature Authority:

Mr. RUFOV, Yury Petrovich

Title:

Mr.

Position:

President of JSC

Tel.:

+7 31645 52568

Fax:

+7 31645 52568

E-mail:

monitlab@pisem.net

Governmental Agency:

Ministry of Science and Education of RK

Sub-manager:

Mr. PONOMARENKO, Aleksandr Stepanovich

Title:

Mr.

Position:

Leading engineer

Tel.:

+7 31645 51982

Fax:

+7 31645 51982

E-mail:

monitlab@pisem.net

4. Foreign Collaborators/Partners

4.1. Collaborators

Institution:

University of Southampton, School of Engineering and Environment

Street address:

University Road, Highfield

City:

Southampton

Region/State:

Hampshire

ZIP:

SO17 1BJ

Country:

United Kingdom

Person:

Mr. TANTON, Trevor William

Title:

Prof., Dr.

Position:

Prof.

Tel.:

+44 2380 595000

Fax:

+44 2380 677519

E-mail:

twt@soton.ac.uk

4.2. Partners

Institution:

US Environmental Protection Agency

Street address:

Code 2660R 1200 Pennsylvania Ave. N.W.

City:

Washington D.C.

Region/State:

District of Columbia

ZIP:

20460

Country:

United States of America

Signature Authority:

Mr.  FREEMAN, Bill

Title:

Mr.

Position:

 

Tel.:

202-564-6472

Fax:

202-564-2409

E-mail:

Freeman.Bill@epa.gov

Project Coordinator:

Mr. RANDALL, Paul

Title:

Dr.

Position:

Senior Chemical Engineer

Tel.:

513-569-7673

Fax:

513-569-7620

E-mail:

Randall.Paul@epa.gov

5. Project Duration

36 month

6. Project Location and Equipment

Institution

Location, Facilities and Equipment

Leading Institution: Almaty Institute of Power Engineering and Telecommunication

Baytursynov Str. 126, Almaty, the Republic of Kazakhstan. The analytical laboratory (rooms ## 528 and 530) has all necessary analytical equipment and volumetric glassware, including AFS analyzer PS Analytical Millennium-Merlin, AAS analyzer Perkin-Elmer AAnalyst 100 and GC Varian Star 3400CX. It also has a necessary infrastructure including central heating, water, the drains and exhaust ventilation. Office of BG Chair of Environmental Technology (rooms # 410 and 411) has the computer equipment connected to a network of Institute and Internet, e-mail, fax and telephones. The Chair also has the equipment necessary for the fieldwork including 3 portable GPS instruments, 2 cars with trailers (UAZ and Niva), rubber boat with motor, portable power-station, equipment for boreholes’ pumping, various samplers & augers (for soils, sediments and water samples) etc.

Participant Institution 1: Institute of Hydrogeology and Hydrophysics

Valikhanova Str. 34, Almaty, the Republic of Kazakhstan. The Laboratory of Informatics and Hydrogeological Processes’ Modelling has an office (room 181) and 4 ancillary rooms with necessary infrastructure. It has 6 computers and 2 servers connected to a local network and Internet as well as e-mail, fax and telephones. It also has a reel-feeding plotter HP DesignJet-500. The software possessed by the Laboratory includes the special hydrological-modelling tool ModFlow GMS 3.1.

Participant Institution 2: Pavlodar Chemical Plant

Northern Industrial Area 1, Pavlodar, the Republic of Kazakhstan. The Laboratory of Environmental Protection (located in 6 rooms in the special laboratory premises) has necessary common analytical equipment and volumetric glassware, as well as AAS mercury analyzer RA915+ (Lumex) and portable AAS mercury analyzer AGP-01. It has a necessary infrastructure including central heating, water, the drains and exhaust ventilation. The office of the Plant has the computer equipment connected to Internet, e-mail, fax and telephones.

Participant Institution 3: Pavlodar State University

Lomov Str. 64, Pavlodar, the Republic of Kazakhstan. Biology and Chemistry Institute has offices with computer equipment connected to a network of Institute and Internet, e-mail, fax and telephones (Building A – offices 8/1, 224,325, 127,515). It has a necessary infrastructure including central heating, water, the drains and exhaust ventilation. It also has the equipment necessary for the fieldworks including 2 cars.

Participant Institution 4: JSC “Biomedpreparat – Engineering Center”, Laboratory of Monitoring

9th Mikroraion, Stepnogorsk, Kazakhstan. Laboratory of monitoring has all necessary equipment and labware for conduction of chemical and microbiological analyses including GLC HP6890 Hewlett Packard, LC Perkin Elmer Series 200, AAS analyzer Perkin Elmer AAnalyst 300, SPH Hewlett Packard 8453, microbiological microscopes Zeiss Standard 25. The Laboratory has computers, faxes, telephones and is connected to Internet and e-mail. It has a necessary infrastructure including central heating, water, the drains and exhaust ventilation. The work will be carried out in rooms ## 213, 211a, 207a and 207b.

 

  

9. Summary of the project

 

Introduction and Overview

The Northern outskirts of Pavlodar are contaminated with mercury as a result of activity of chlor-alkali production of former PO “Khimprom” that was finally closed down in 1993. In 2004 the Phase I of the demercurization of PO “Khimprom” funded from the state budget and lying in the containment and isolation of the main source of pollution is expected to be complete.

 

In 2001-2002 the area of mercury contamination was studied by the consortium of research institutions (AIPET, IHH, Institute of Nuclear Physics of RK National Nuclear Center, JV “Evrohim” and Siberian Spiritual-Environmental University) in the framework of EU-funded project ICA2-CT2000-10029 “Toxicmanagement”. Field studies and computer modeling with ModFlow GMS 3.1 software was used to forecast the spread of mercury-contaminated groundwater in the Northern industrial area of Pavlodar. Based on these studies a strategy for limiting the risks from mercury pollution in this area was revised. In 2003-2004 the Program of Post-containment Mercury Monitoring for the period of 2005-2020 was developed in AIPET by request of PCP. This Program is stipulated for a small amount of funding from the budget of the Pavlodar oblast.

 

In 2003 the Pavlodar Hydrogeological Expedition found a plume of groundwater contaminated with petroleum and oil products in the Northern industrial area of Pavlodar.

 

Although the main risk posed by mercury contamination in site of former PO “Khimprom” is currently contained by cut-off walls and capping of the most contaminated sites significant risks in the Northern outskirts of Pavlodar still remain. Monitoring of the industrial area of Pavlodar will allow assessing the risks and make them manageable. 

 

The objectives of this research are:

a).    to identify the risk associated with the spread of groundwater plumes contaminated with mercury and oil products, including their movement through the network of water supply wells in village Pavlodarskoye, and further towards the Irtysh River and/or their rise onto the pastures and, if significant, identify a management strategy to contain the risk;

b).    to identify a management strategy for containing the environmental risk caused by the mercury pollution of wastewater storage pond Balkyldak, including the pathway of pollutants bioaccumulation via food chains;

 

The project will specifically aim at the following:

1.      Study of the movement of mercury in the groundwater rise in depressed area in saturated and unsaturated zones and its accumulation in the shallow ponds and vegetation. Development of management strategy to contain the risk to population in the vicinity and livestock;

2.      Assessment of possibility for mercury-polluted groundwater flow to change its direction; study of interaction of contaminated groundwater with bearing strata and underlying aquifers:

3.      Study of the spread of groundwater plume contaminated with oil products from the territory of Pavlodar Oil Refinery; development of model and assessment of environmental risk posed by oil-products contamination of groundwater in the Northern  industrial area of Pavlodar:

4.      Assessment of possibility to contain the risk posed by mercury pollution of the pond Balkyldak including the fish within it;

5.      To draw up and discuss with local stakeholders the recommendations for the 2nd stage of demercurization and other remediation activities in the area of the former PO “Khimprom” (Northern industrial area of Pavlodar), including the recommendation for abolishment or further safe use of the wastewater storage pond Balkyldak.

 

Expected Results and Their Application

 

One of the most important results of proposed study will be the foundation of monitoring laboratory of PCP that will be capable of implementation of post-containment monitoring Program in the Northern industrial area of Pavlodar during 2005-2020. This laboratory together with AIPET will carry out the first stage of monitoring studies. The monitoring of groundwater contamination with petroleum and oil products will be conducted by BML in cooperation with PCP. PSU together with AIPET will carry out the study of mercury contamination of bottom sediments and biota from the wastewater storage pond Balkyldak. AIPET together with IHH will make the risk assessment posed by residual mercury contamination on the territory of former PO “Khimprom” and around it, as well as assessment of risk from groundwater contamination by oil products. IHH will also upgrade the groundwater model for the Northern industrial area of Pavlodar and make it more accurate. This will allow making proposals to manage the contamination of groundwater by mercury and oil products. Proposal for risk management in Northern outskirts of Pavlodar will be drawn up and discussed with local stakeholders and state authorities. This will include possible implementation of 2nd stage of PO “Khimprom” demercurization and/or brining wastewater storage pond Balkyldak to safe conditions.

 

Meeting ISTC Goals and Objectives                  

 

The proposed project:

-          Provides weapon scientists and engineers in Kazakhstan, particularly those who possess knowledge and skills related to weapons of mass destruction, opportunities to redirect their talents to peaceful activities;

-          encourages integration of scientists of Kazakhstan into the international scientific community;

-          supports applied research for peaceful purposes, notably in fields of environmental protection and remediation.

 

Scope of Activities

 

AIPET will coordinate fieldworks and chemical-analytical activities. AIPET together with PCP laboratory will carry out fieldworks and chemical analyses associated with the study of mercury contamination of groundwater. The pathways of mercury accumulation via food chains in the wastewater storage pond Balkyldak will be studied by AIPET in cooperation with PSU. AIPET will estimate the amount of mercury deposited in bottom sediments of the pond Balkyldak and gather the data in order to justify the proposals for its safe use. The recommendations for the 2nd stage of demercurization and remediation activities will be drawn up by AIPET together with IHH.

 

IHH will conduct all activities related to the computer modeling including upgrading and detailed elaboration of models of groundwater contamination in the Northern industrial area of Pavlodar. IHH will coordinate and manage monitoring and fieldworks in cooperation with AIPET. The results of this work will be incorporated into upgraded model that will allow assessing and managing the risk posed by mercury and oil products contamination of groundwater.

 

PCP will establish monitoring laboratory and train its staff in the methods of determination of total mercury in environmental compartments and oil products in natural water samples. PCP will conduct the analyses of bottom sediments samples for the content of total mercury. PCP will create the network of observation boreholes in order to track groundwater contaminated with oil products. PCP will carry out post-containment monitoring in the Northern industrial area of Pavlodar together with AIPET and the study of groundwater contamination with petroleum and oil products together with BML.

 

PSU will carry out the sampling of bottom sediments of wastewater storage pond Balkyldak and study food chains in this water body.

 

BNL together with PCP will carry out fieldworks and chemical analyses associated with the study of oil-products contamination of groundwater.

 

Role of Foreign Collaborators/Partners

 

Collaborator Trevor W. Tanton will be a consultant during coordination and conduction of the works.

The Partner will carry out activities, monitoring and audit in the whole duration of the project.

Foreign Partner Paul Randall is a key person in achieving the goals and objectives of the project. Close interrelation is anticipated between the scientists of research laboratories of Kazakhstan and USA. The exchange of materials, scientific data is foreseen, and joint preparation of scientific publications will be carried out. The communications will be done by means of e-mail, telephone, fax and express mail.

 

Technical Approach and Methodology

 

During sampling and chemical analyses the methods recommended by US EPA will be used as well as standard procedures on Quality Control/Quality Assurance accepted in the West. Assessment and management of risk associated with groundwater contamination will be carried out using hydrogeological models received by means of the ModFlow GMS 5.0 software.

 

PROJECT PROPOSAL

K-1240p

 

II. Detailed Project Information

 

There are several regions in Kazakhstan (Pavlodar and Temirtau) and in the rest of former USSR (Sterlitamak, Zima, Usolie-Sibirskoye, Bratsk, Volgograd, Kirovo-Chepetsk, Bereznyaki, Kiev, Sumgait, Begorod, Shvarts), which are contaminated with mercury as a result of technogenic releases from industrial enterprises (mainly chlor-alkali productions of PO “Khimprom” and PO “Kaustik” of the former USSR Ministry of chemical industry, a part of which is still operating). The release of mercury into the environment has led to significant contamination of surface and ground water with dissolved mercuric compounds.

 

The Northern outskirts of Pavlodar are contaminated with mercury as a result of activity of chlor-alkali production of former PO “Kimprom” that was finally closed down in 1993. According to the data of [1], 65 525 tons of sodium hydroxide (caustic soda) were produced and 1089.356 tons of mercury were consumed during 14-year period from 1975 till 1989. It was found out from personal communication with formers directors of PCP that another 90 000 tons of caustic soda were produced and another 72 tons of mercury were consumed during the last period of factory operation from 1990 till 1993. Less than 2.6% (or 302 tons) of consumed mercury were sent as a sludge for recycling to the mercury processing factory [1]. The former directors of PCP also advise that after the production was stopped and the building of electrolysis factory with all the equipment was dismantled 140 tons of mercury have been extracted, collected and sent to the mercury processing factory. Therefore, the total losses of mercury during the whole period of operation of chlor-alkali production can be estimated as 720 tons, 80% of which (i.e. approximately 580 tons) were unaccounted mechanical losses [1] deposited in the concrete floor and underneath the factory building # 31.

 

The studies jointly conducted in the 1980s by JV “Evrohim”, Kiev and Pavlodar Hydrogeological Expedition – NTC “Tekhnolog” (PHH) were the starting point for the unique Project of Demercurization of chlor-alkali production at the former PO “Khimprom”, Pavlodar. For the first time in the former USSR this Project was based on the strategy of the management of risk associated with mercury pollution. The Demercurization Project was funded from a number of sources and various enterprises and research institutes were engaged in its implementation. The following describes the main stages of the Project’s Phase I which is close to completion at present time and lying in the containment and isolation of the principal sources of mercury pollution:

·        Assessment of the extent of mercury pollution at chlor-alkali production and development of the recommendations for the neutralization and disposal of mercury-containing wastes. Funded by PO “Khimprom”, Pavlodar. Completed by JV “Evrohim”, Kiev in 1988-92 [1-7];

·        Study of the effect of wastewater storage pond Balkyldak and ash lagoons of power stations (TES) ## 2 and 3 on the direction of groundwater flow in the Northern industrial area of Pavlodar. Funded by the State budget of Kazakhstan. Conducted by (i) Pavlodar Hydrogeological Expedition, (ii) Institute Kazvodokanalproekt, Almaty, (iii) the Laboratory of aerospace methods of VNII of Transportation Construction, Moscow, and (iv) State Centre “Nature” at Moscow State University in 1989-90 [8-11];

·        Assessment of risk of mercury pollution for the recreation zone – Lake Muyaldy. Funded by the State budget of Kazakhstan. Conducted by Kazgeokaptyazhminvod, Almaty in 1990-91 [12];

·        Assessment of the boundary of mercury pollution spread around PO “Khimprom”, Pavlodar. Assessment of the impact of mercury pollution on local population and environment. Funded by (i) the Ministry of Health Protection of Kazakhstan and (ii) the Academy of Sciences of Kazakhstan. Conducted by (i) Kazakh State University, Almaty, (ii) Institute of Soil Science, Almaty, and (iii) Centre of Health Protection, Almaty in 1990-96 [13-18];

·        Development of the Demercurization Design for the closed chlor-alkali production. Funded by PO “Khimprom”, Pavlodar. Conducted by JV “Evrohim”, Kiev in 1994-95 [19-22];

·        Study of mercury contamination of soils and surface water bodies (including the Irtysh River) located in the Northern industrial area of Pavlodar. Funded by (i) the European Union via INTAS program and (ii) the State budget of Kazakhstan (Project INTAS-Kz 95-19). Conducted by (i) KazNIIGeophysika, Almaty and (ii) Kazakh State University, Almaty in 1997-99 [23];

·        Assessment of risk posed by mercury pollution in the Northern industrial area of Pavlodar. Funded by (i) the European Union via INCO-2 program and (ii) the government of the Netherlands (project ICA2-CT2000-10029 “Toxicmanagement”). Conducted in 2001-2002 by (i) the University of Southampton, United Kingdom, (ii) Consulting company “GeoDelf”, the Netherlands, (iii) JV “Evrohim”, Kiev, (iv) Siberian Spiritual-Environmental University, Omsk, (v) AIPET, Almaty, (vi) IHH, Almaty, (vii) Institute of New Chemical Technologies and Materials at Kazakh State University, Almaty, and (viii) Institute of Natural Science Ltd., Almaty [24-28];

·        Demercurization of closed chlor-alkali production of former PO “Khimprom”. Funded by PCP from the budget of Pavlodar oblast and State budget of Kazakhstan. Conducted by PCP in 1998-2004 [29-30].

 

In 2003 the Phase II of the Demercurization Project at the chlor-alkali production of former PO “Khimprom” has been started. This Phase is mainly related to the management of mercury pollution of groundwater in the Northern industrial area. Two projects are currently in progress in the framework of Phase II. These projects have the following objectives:

·        Development of bioremediation techniques for mercury contaminated groundwater in Northern Kazakhstan. Funded by US EPA via ISTC (Project K-756p). This project is conducted from 2002 to date by (i) the Institute of Microbiology and Virology, Almaty, (ii) BML, Stepnogorsk and (iii) AIPET, Almaty;

·        Development of the Program of Post-containment Mercury Monitoring of air, soil, surface water and groundwater in the Northern industrial area of Pavlodar. Funded by PCP. This project is conducted from 2003 to date by AIPET [31].

 

The implementation of Phase III of Demercurization Project might also be required in the future. This Phase could be associated with the fate of wastewater storage pond Balkyldak, which has the surface area of 30 km2. Water, bottom sediments and fish in this pond are contaminated with mercury and may cause a threat to the population of Pavlodar outskirts.

 

The initial Strategy for the mercury pollution management proposed by JV “Evrohim” (Design of JV “Evrohim”) [22] assumed that: (i) the equipment would be dismantled, demercurized and recycled; (ii) the buildings of chlor-alkali production would be dismantled and the concrete floor of building # 31 together with contaminated ground from underneath and around of this building would be excavated and replaced with clean ground; and (iii) the isolating bentonite cut-off wall would be constructed around building # 31 to the depth of 20 m. All construction materials contaminated with Hg less than 0.3% had to be disposed to the below-the-ground landfill and filled up with the cement solution to form the monolith. All materials highly-contaminated with Hg above 0.3% had to undergo initial hydro-vibrating separation or to the thermal treatment in the oven in order to recover metallic mercury. All processed materials had to be disposed to the landfill.

 

During several years PCP and local environmental authorities conducted the expertise of JV Evrohim design and also were looking for the source to fund the works on demercurization of the buildings and the industrial site of PCP (all valuable equipment, non-ferrous metals and commodity metallic mercury were utilized straight after the chlor-alkali production closure in 1993-1994). The turning point was the support of Demercurization Project by Governor of Pavlodar Oblast Mr. Daniyal Akhmetov (at present he is the Prime-Minister of Kazakhstan). The small funding from the oblast’s budget was allocated in 1998. This funding was sufficient only for the ripping-up of the building # 31 that resulted in an intensive evaporation of mercury during summer 1999. Governor of Pavlodar announced an emergency situation in the town and under public and mass-media pressure the Government of Kazakhstan funded the partial dismantling of building # 31 (electrolysis factory) and collection of spilled mercury. After the funding came to the end, the further works were postponed [30].

 

In 1999 French state company BRGM were carrying out the mission of French Government which the Government of Kazakhstan applied for the help to (Resolution of the Government of Kazakhstan #179 from February 26, 1999). BRGM proposed “the Project for the prevention of mercury pollution at JSC “Khimprom”, Pavlodar” (Project of BRGM) [32-33]. The original version of BRGM project assumed the total revision of the project of JV “Evrohim” (including the cancellation of the plans to create the constant landfill for the materials containing less than 0.3% of mercury, to build the cut-off wall, and to separate mercury from highly-contaminated ground). Instead of that it was proposed to divide the solution of the problem into three stages: (i) dismantling of the buildings of chlor-alkali production, extraction and separation of wastes containing mercury with further disposal to the temporary landfill; (ii) reduction of Hg content in soils and ground to the acceptable level; and (iii) ensuring the total safety of Pavlodar site regarding to the mercury pollution. The first stage assumed that using the $2 million of funding from World Bank (WB) temporary landfill would be constructed and all mercury-containing wastes excavated from the source would be disposed there. The mercury deposited in the concrete floor of electrolysis factory as well as around and underneath it would be isolated from atmosphere using the special covering containing sulfur. The second stage assumed that $5 million funding from the loan of France would help to conduct the thermal recovery of mercury from the mercury-containing wastes, concrete floor of electrolysis factory and soils contaminated above the acceptable level. The third stage assumed the conduction of additional studies and was due to the funding from WB.

 

However, in the course of further negotiations the proposals of BRGM were modified. The new version of proposal assumed that using $8.2 million of French loan for the first stage: (i) the status of mercury pollution in site of PCP and around would be investigated; (ii) the concrete floor of electrolysis factory would be covered by engineering capping; (iii) the building of electrolysis factory would also be isolated by cut-off wall; and (iv) the technology of thermal mercury extraction from contaminated ground and construction materials would be developed using the pilot tests [34-35]. In such situation the Kazakhstan side had to insist on the urgent implementation of Evrohim design using the French loan without any changes of initial design that would result in the extension of hazardous environmental situation. Negotiation were delayed until 2001 and ended up with no practical results.

 

In 2001-2002 the area of mercury contamination was studied by the consortium of European and Kazakhstan research institutions (including AIPET and JV “Evrohim”) in the framework of EU-funded project ICA2-CT2000-10029 “Toxicmanagement” [24-28].

 

Using the existing network of observation boreholes as well as the newly constructed ones the groundwater conditions in the Northern outskirts of Pavlodar were studied. The plume of mercury contaminated groundwater was found, which spread on the depth of 6-14 m in parallel to the Irtysh River to the distance of 2.5 km from the building # 31. Field studies and computer modeling with ModFlow GMS 3.1 software was used to forecast the spread of mercury-contaminated groundwater in the Northern industrial area of Pavlodar. The software package “ArcGIS – Spatial analysis” was used to create and analyze the maps of distribution of Hg in soils located in the industrial site of PCP and surrounding territory (in the layers 0-0.1; 0.1-0.2 and 0.2-0.5 m deep). The monitoring of the mercury contamination of surface water, fish and grazing grass was also conducted, as well as the risk assessment for the population living in the neighborhood. Basing on these studies a strategy for limiting the risks of mercury proposed by JV “Evrohim” was revised.

 

The revision of JV “Evrohim” design was carried out in 2003 and had the principal idea to cancel any attempts to extract mercury by any means from the concrete floor of building #31, and highly contaminated grounds and construction materials. Instead it was decided to construct the isolating cut-off wall to the depth of underlying bed not only around the building #31 but also around the other principal sources of mercury pollution (four sources in total). It also was decided to make special engineered capping above the areas isolated by cut-off walls in order to avoid the mercury transport to atmosphere. Therefore the revised JV “Evrohim” design lay in the isolation and containment strategy instead of the strategy of excavation and recovery of Hg. The newly formulated concept was approved by the Academy of Sciences of Kazakhstan [24] and by the Kazakh Ministry of Environmental Protection. It was accepted for implementation and funded from the state budget of Kazakhstan. Its completion was expected at the end of 2004. The total costs for demercurization (excluding the costs for designing and research) reached to date $7.5 million [29].

 

In 2003-2004 the Program of Post-containment Mercury Monitoring for the period of 2005-2020 was developed in AIPET by request of PCP. This Program is stipulated for a small amount of funding from the budget of the Pavlodar oblast [31]. In August 2004 AIPET and PCP will for the first time carry out together trial fieldworks in accordance with this Program. Ministry of Environmental Protection of Kazakhstan has already included this Program into the list of projects that are seeking international sponsors to be funded.

 

In 2003 the Pavlodar Hydrogeological Expedition found a plume of groundwater contaminated with petroleum and oil products in the Northern industrial area of Pavlodar. The source of this contamination is Pavlodar Oil Refinery located nearby the former PO “Khimprom”. Due to the limited funding only a small number of observation boreholes was constructed which did not allow gathering any kind of complete database about this plume. It was presumed that the oil plume spread in the same direction as the plume of mercury polluted groundwater. However, during the field research on the project ICA2-CT2000-10029 “Toxicmanagement” the research team of AIPET found low quality of water in a number of water supply wells in the northern outskirts of Pavlodar that makes this water unacceptable for drinking purposes, though mercury was not detected there.

 

Although the main risk posed by mercury contamination in site of former PO “Khimprom” has been currently contained by cut-off walls and capping of the most contaminated sites significant risks in the Northern outskirts of Pavlodar still remain due to:

1. possible change of plume direction and/or upward movement of mercury-polluted groundwater to the surface in the pastures of the depression next to the pond Balkyldak;

2. high level of contamination of the wastewater storage pond Balkyldak as well as the fish within it;

3. possible spread of plume of groundwater contaminated with petroleum and oil products towards village Pavlodarskoye (which has a groundwater offtake) and further to the Irtysh River.

 

The monitoring studies in the Northern outskirts of Pavlodar will allow the assessment of those residual risks and thus will make them manageable.

 

Basing on the results and findings of the project ICA2-CT2000-10029 “Toxicmanagement” two researchers from IHH (V.Panichkin and O.Miroshnichenko) defended in 2004 their theses for academic degrees of Dr. Sci. and PhD respectively in the hydrogeological field of study.

 

AIPET is currently participating in ISTC project K-756p aiming at the development of biotechnology for clean-up of groundwater contaminated with dissolved mercuric species for the particular case of the Northern industrial area of Pavlodar

 

The objectives of this research are:

a)    to identify the risk associated with the spread of groundwater plumes contaminated with mercury and oil products, including their movement through the network of water supply wells in village Pavlodarskoye, and further towards the Irtysh River and/or their rise onto the pastures and, if significant, identify a management strategy to contain the risk;

b)    to identify a management strategy for containing the environmental risk, caused by the mercury pollution of the pond Balkyldak, including the pathway of pollutants bioaccumulation via food chains;

 

The project will specifically aim at the following:

1.      Study of the movement of mercury in the groundwater rise in depressed area in saturated and unsaturated zones and its accumulation in the shallow ponds and vegetation. Development of management strategy to contain the risk to population in the vicinity and livestock:

§         To facilitate the Laboratory of environmental protection of PCP with the equipment for conduction of mercury monitoring, and to train the local staff;

§         To carry out 3-year post-containment monitoring program in the Northern industrial area of Pavlodar, including the monitoring of soils and vegetation of pastures in the close vicinity of contamination, and to develop recommendations for the further implementation of monitoring program;

2.      Assessment of possibility for mercury-polluted groundwater flow to change its direction; study of interaction of contaminated groundwater with bearing strata and underlying aquifers:

§         To upgrade and detail the models of groundwater in the Northern industrial area of Pavlodar and contamination of groundwater with mercury;

§         To investigate the possible connection in the aureole of mercury pollution between the groundwater of Low-Medium Pliocene deposits of Pavlodar assise and groundwater of Oligocene deposits of Nekrassovskaya suite;

§         To define more accurately forecast for spread of mercury-containing groundwater in the Northern industrial area of Pavlodar taking into account adsorption/desorption of mercury on bearing strata of aquifers and on surface of basalt clay;

3.      Study of the spread of groundwater plume contaminated with oil products from the territory of Pavlodar Oil Refinery; development of model and assessment of environmental risk posed by oil-products contamination of groundwater in the Northern  industrial area of Pavlodar:

§         To facilitate the Laboratory of environmental protection of PCP with the equipment to monitor contamination of groundwater with oil products, and to train the local staff;

§         To drill and equip new observation boreholes for groundwater sampling and to do chemical analyses in order to define the direction of spreading the plume of groundwater contaminated with petroleum and oil products;

§         To develop the model of spreading the oil products with groundwater in the Northern industrial area of Pavlodar.

4.      Assessment of possibility to contain the risk posed by mercury pollution of the pond Balkyldak including the fish within it:

§         To study the mercury contamination of bottom sediments in the pond Balkyldak, and to estimate the amount of deposited mercury;

§         To study the food chains of the pond Balkyldak and to assess the bioaccumulation of mercury in aqueous organisms.

5.       To draw up and discuss with local stakeholders the recommendations for the 2nd stage of demercurization and other remediation activities in the area of the former PO “Khimprom” (Northern industrial area of Pavlodar), including the recommendation for abolishment or further safe use of the wastewater storage pond Balkyldak.

 

     

 
List of references

 

1.      E.N.Lushin, T.E.Krakhaleva, A.F.Krakhalev. (Final) Report of the results on determination of the evel of mercury contamination at the site of chlor-alkali production of Pavlodar Chemical Plant. Scientific-Research Centre “Tekhnolog”, Pavlodar, 1990, 194 p.

2.      V.A.Skripnik, A.A.Uzbekov, AYu.Noel, M.I.Korshun. Report: “The study results of the mercury contamination levels in the construction materials of industrial buildings; calculation of toxicity index of the above-ground parts of buildings. Development of the recommendations for the disposal of mercury-containing construction materials and wastes after demercurization of buildings”. KNIF GosNIIKHLORPROEKT, Kiev, 1989, 39 p.

3.      V.A.Skripnik, V.I.Bramashenko, M.N.Korshun. Recommendation for the demercurization of equipment and disposal of wastes from mercury-utilizing chlor-alkali production of Pavlodar Chemical Plant. KNIF GosNIIKHLORPROEKT, Kiev, 1989, 41 p.

4.      L.E.Postolov, I.I.Drel. Report of the Project: “Development of waste-free processes for the clean-up of wastewater and gaseous emissions from mercury; development of the technology for mercury extraction from the grounds of mercury electrolysis site; implementation of the pilot-scale tests of the process”. KNIF GosNIIKHLORPROEKT, Kiev, 1990.

5.    V.A.Skripnik, A.A.Uzbekov. Original data and recommendations for the elimination of mercury pollution of ground from mercury-utilizing chlor-alkali production of Pavlodar Chemical Plant. KNIF MNPO “Syntez”, Kiev, 1991, 43 p.

6.    A.A.Uzbekov, A.Yu.Noel, V.P.Zolin. Recommendations for the protection of environment from the mercury pollution. KNII “Synteco” Kiev, 1992, 22 p.

7.    V.V.Sokolov, V.S.Mochulsky, V.V.Kuznetsov. Main requirements for the project implementation of demercurization of equipment and construction materials, and for the elimination of mercury pollution of ground on site of building 31 at Pavlodar PO “Khimprom”. Institute Giprosintez, Volgograd, 1992, 10 p.

8.    Geo-ecological assessment of the site of Pavlodar Chemical Plant. NPF TEKKOM-KOSMOS. Moscow, 1990, 18 p.

9.    E.N.Lushin, N.R.Shaimardenov. Report of the Environmental-hydrogeological team on the results of hydrogeological works on site of Pavlodar Oil Refinery and surrounding territory. Pavlodar hydrogeological expedition, Pavlodar, 1990, 23 p.

10.    V.A.Kolesnikov, T.G.Pershina, B.P.Salnikov, S.B.Vinokurova. The revision of the draft documentation of wastewater evaporator of Pavlodar chemical plant.. Kazvodokanalproekt, Almaty, 1991, 45 p.

11.    E.N.Lushin. Hydrogeological conclusion about the effect of the ash lagoons of Pavlodar Thermal Power Plant # 3 on geological environment. Pavlodar hydrogeological expedition, village Zhetekshi, 1993, 12 p.

12.    A.P.Iskhakov, N.V.Dunichevskaya. Report # 42343. Identification of the sources of pollution in the area of lake Muyaldy basing on the works conducted in 1990-1991. Hydrogeological practical enterprise “Kazgeokaptyazhminvod”, Almaty, 1992, 67 p.

13.    M.Sh.Ishamkulov, A.D.Saltybaev. Report of the project “Contamination of snow in Pavlodar and its outskirts by chemical elements”. Center for health protection of the Ministry of Health of Kazakhstan. Almaty, 1991, 5 p.

14.    M.Sh.Ishamkulov, A.D.Saltybaev. Report of the project “Study of current status of technogenic contamination of soils, drinking water, plants and foodstuff in Pavlodar”. Center for health protection of the Ministry of Health of Kazakhstan. Almaty, 1992, 7 p.

15.    N.M.Khlystun. Ecological and chemical study of the environmental conditions at the territory o Pavlodar-Ekibastuz industrial agglomerate. Proceedings of the PhD thesis. Almaty, 1999, 28 p.

16.    M.A. Ilyushchenko. Final report for the scientific research conducted in 1993-1996 in the framework of Program of fundamental research "Development of atomic-absorption methods of analysis of mercury and its forms in environmental objects and the estimation of the scales of technogenic geochemical mercury anomalies in the Central and North-East Kazakhstan". NII NKhTiM at KazGU, Almaty, 1996, 102 p.

17.    M.A.Ilyushchenko, S.Heaven. Mercury technogenic geochemical anomalies of Central and North-East Kazakhstan. A review of results of expeditionary studies. In book: Materials of scientific - practical conference "Modern problems of the environment of Central Kazakhstan", dedicated to 25-years of the Karaganda State University of E.A.Buketov (Karaganda, 17-18 October 1996). Karaganda, 1996, p. 157-162. And also: Vestnik KazGU, A serial ecological, #3, 1997, p. 28-30.

18.    M.A.Ilyushchenko, S.Heaven, E.P.Yanin. Monitoring and estimation of contamination by mercury of the outskirts of Pavlodar. In book: Geochemical studies of urban agglomerations. Moscow, IMGRE, 1998, P. 59-68.

19.    L.E.Postolov. Original data for the designing of the process of neutralization and disposal of mercury-containing materials formed at Pavlodar PO “Khimprom” as a results of demercurization activities. JV “Evrokhim”, Kiev, 1995, 31 p.

20.    Report of the project “Development of the formula of concrete mixture and the method of its preparation and its laying to the landfill; selection of composition and testing of the samples of fine ground-concrete on the basis of astringent portland cement”. Kiev State University of Architecture and Construction, Kiev, 1995.

21.    E.N.Lushin. Interim conclusion of the selection procedure of the site for sarcophagus for the disposal of mercury-containing materials on industrial site of Pavlodar Chemical Plant. GAO “Pavlodargidrogeologiya”, village Zhetekshi, 1995.

22.    L.E.Postolov, I.I.Drel. Demercurization of the closed chlor-alkali production. Draft Design. General annotated report. JV “Evrokhim”, Kiev, 1995, 89 p.

23.    V.Pokidov, I.Kamberov, M.Politikov, M. Ilyushchenko, M. Davis, H. Gartner. Final report on the project “Pavlodar INTAS-Kz-95-19” for the period 1997-1999. Almaty, 1999, Dublin, 81 p.

24.    1. T.W.Tanton, V.V.Veselov, M.A.Ilyushchenko, V.Yu.Panichkin. Risk assessment from mercury contamination of Northern industrial site of Pavlodar city. Reports of National Academy of Sciences of the Republic of Kazakhstan. #4, 2003, p. 78-81.

25.    S.M.Ullrich, M.A.Ilyushchenko, I.M.Kamberov, V.Yu.Panichkin, T.W.Tanton. Mercury pollution around a chlor-alkali plant in Pavlodar, Northern Kazakhstan. RMZ-Materials and Geoenvironment. Special issue: Mercury as a Global Pollutant. V. 51, N 1, 2004, p. 298-302.

26.    M.Ilyushchenko, G.A.Uskov, N.A.Zyryanova, S.S.Galushchak, V.A.Skakun. Mercury (Hg) contamination of fish fauna of technical reservoir Balkyldak. Vestnik KazGU. Ecological series, #2 (11), 2002, p. 102-105.

27.    O.L.Miroshnichenko. Creation and identification of mathematical models of geofiltration on the basis of GIS technologies and expert approach. Proceeding of the PhD thesis. Almaty, 2004, 26 p.

28.    V.Yu.Panichkin. Geoinformatical and mathematical modeling of the hydrogeological systems of Kazakhstan. Proceeding of the Dr. Sci. thesis. Almaty, 2004, 48 p.

29.    V.A.Bednenko. Elimination of mercury pollution at JSC “Pavlodar Chamical Plant”. Proceedings of international scientific conference “Problems of management and rational use of the water resources of river Irtysh basin” (May 20-21, 2004), Omsk, 2004, p. 12-14.

30.    A.D.Akhmetov, M.A.Ilyushchenko, L.V.Kuzmenko. Demercurization of the source of mercury pollution on the territory pof former PO “Khimprom”, Pavlodar. Proceedings of international scientific conference “Problems of management and rational use of the water resources of river Irtysh basin” (May 20-21, 2004), Omsk, 2004, p. 15-19.

31.    M.A.Ilyushchenko, G.Zh.Daukeev. Program of mercury monitoring in the Northern industrial area of Avlodar for 2005-2020. AIPET, 2004, 10 p.

32.    B.Koste, V.Fukon. Preliminary report on the assessment of mercury pollution impact at the territory of Pavlodar (North-East Kazakhstan). # 2874. BRGM, 1999, 21 p.

33.    V.Fukon. Technical specifications for the temporary containment of the spread of pollutants. # 2874B. BRGM. 1999. 6 p.

34.    Project de rehabilitation de la zone par poluee par le mercure de Pavlodar. Analyse technique, economique et financiere du project. BRGM. 2000. 22 p.

45.    Feasibility study for the project “Demercurization of mercury and elimination of the source of mercury pollution in Pavlodar”. BRGM, 2000, 176 p.

 

2. Expected Results and Their Application

 

The proposed study is an applied research in the field of environmental protection. It is assumed that in the course of this works new facts might be revealed that would require the deepening and the extension of the research. The results of the research and its stages will be presented as interim and final reports.

 

·        One of the most important results of proposed study will be the foundation of monitoring laboratory of PCP that will be capable to implement Post-containment monitoring Program in Northern industrial area of Pavlodar during 2005-2020 after completion of proposed ISTC study. This laboratory will be also capable to conduct other investigations in the field of environmental protection. The completion of Phase I of Demercurization Project does not assume termination of the investigation of mercury pollution in Pavlodar. The Phases II and III are starting that will require more detailed and more extensive studies of the residual mercury pollution and associated risk. These reasons will allow the laboratory of PCP to become self-supporting;

·        PCP together with AIPET will carry out the monitoring study of the mercury contamination of groundwater in the Northern industrial area of Pavlodar;

·        AIPET together with PCP will study the extent of mercury contamination of pastures in the areas where the upward movement of polluted groundwater is possible;

·        BML together with PCP will conduct the monitoring study regarding to the groundwater contamination with petroleum and oil products in the Northern industrial area of Pavlodar;

·        AIPET together with PSU will determine the levels of total mercury content in bottom sediments and biota from the wastewater storage pond Balkyldak;

·        AIPET together with IHH will assess the risks associated with the residual mercury contamination of groundwater and wastewater storage pond Balkyldak;

·        IHH together with AIPET will assess the risks posed by contamination of groundwater with petroleum and oil products;

·        IHH will upgrade the groundwater model for the Northern industrial area of Pavlodar and make it more accurate. IHH will make forecasts for the future spread of groundwater contaminated with Hg and oil products;

·        AIPET together with IHH will draw up and discuss with local stakeholders and state authorities the proposal for risk management in the Northern outskirts of Pavlodar including possible implementation of 2nd stage of PO “Khimprom” demercurization and/or brining wastewater storage pond Balkyldak to safe conditions.

 

3. Meeting ISTC Goals and Objectives

 

The proposed project:

-          provides weapon scientists and engineers in Kazakhstan, particularly those who possess knowledge and skills related to weapons of mass destruction, opportunities to redirect their talents to peaceful activities;

-          encourages integration of scientists of Kazakhstan into the international scientific community;

-          supports applied research for peaceful purposes, notably in fields of environmental protection and remediation.

 

4.      Scope of Activities

 

AIPET will coordinate fieldworks and chemical-analytical activities. AIPET will also render a support to the local staff of PCP monitoring laboratory in training related to the determination of total mercury in environmental samples. AIPET together with PCP laboratory will carry out fieldworks and chemical analyses associated with the study of mercury contamination of groundwater. The pathways of mercury accumulation via food chains in the wastewater storage pond Balkyldak will be studied by AIPET in cooperation with PSU. AIPET will estimate the amount of mercury deposited in bottom sediments of the pond Balkyldak and gather the data in order to justify the proposals for its safe use. The recommendations for the 2nd stage of demercurization and remediation activities will be drawn up by AIPET together with IHH.

 

IHH will conduct all activities related to the computer modeling including upgrading and detailed elaboration of models of groundwater contamination in the Northern industrial are of Pavlodar. IHH will coordinate and manage monitoring and fieldworks in cooperation with AIPET. The results of this work will be incorporated into upgraded model that will allow assessing and managing the risk posed by mercury and oil-products contamination of groundwater.

 

PCP will establish monitoring laboratory and train its staff in the methods of determination of total mercury in environmental compartments and oil products in natural water samples. PCP will conduct the analyses of bottom sediments samples for the content of total mercury. PCP will create the network of observation boreholes in order to track groundwater contaminated with oil products. PCP will carry out post-containment monitoring in the Northern industrial area of Pavlodar together with AIPET and the study of groundwater contamination with petroleum and oil products together with BML.

 

PSU will carry out the sampling of bottom sediments of wastewater storage pond Balkyldak and study food chains in this water body.

 

BML will render a support to the local staff of PCP monitoring laboratory in training related to the determination of oil products in natural water samples. BNL together with PCP will carry out fieldworks and chemical analyses associated with the study of oil-products contamination of groundwater.

 

Scheme of cooperation at the implementation of Project tasks

 

 

 

The project includes the following tasks:

 

1.  Study of the movement of mercury in the groundwater rise in depressed area in saturated and unsaturated zones and its accumulation in the shallow ponds and vegetation. Development of management strategy to contain the risk to population in the vicinity and livestock:

 

§         To facilitate the Laboratory of environmental protection of PCP with the equipment for conduction of mercury monitoring, and to train the local staff;

The laboratory of PCP already possesses the chemical and analytical equipment (made in Soviet Union and Russia) for the determination of total Hg in the air and solid samples. The personnel experienced in using of this equipment is also available. The purchase of highly sensitive AFS-analyzer will be required for the determination of total mercury in water and biological tissues. The personnel will be trained for the using methods which allow detection of mercury at ppt level (i.e. using the specially cleaned glassware, clean room practice, quality control/quality assurance procedures including application of special methods and standard reference materials etc.). The purchase of additional equipment for the sampling of surface water and groundwater is required (water level measuring devices, portable power generator, immersible pumps with hoses, filtration units etc.), and the subsequent training of PCP staff for application of special sampling method will be necessary.

 

§         To carry out 3-year post-containment monitoring program in the Northern industrial area of Pavlodar, including the monitoring of soils and vegetation of pastures in the close vicinity of contamination, and to develop recommendations for the further implementation of monitoring program;

The Program of post-containment monitoring for 2005-2020 will be revised and extended in compliance with the more comprehensive capabilities of PCP regarding to the trace level analysis of mercury (e.g. to enlarge the Program with Hg determination in the samples of grazing grass, milk and other biological samples). The hydrogeological parameters (water levels in boreholes, pH, temperature, redox potential) will be measured and samples of surface water and groundwater as well as biological samples will be taken during 3-year period according to the Monitoring Program. Chemical analyses of samples will be done in the laboratory of PCP, and the inter-laboratory control will be conducted by the laboratory of AIPET. The results of analyses will be analyzed by statistical mean, entered to the database and transferred to AIPET. In the course of these activities the new proposals for the further revision of Monitoring Program might be drawn up.

 

2.  Assessment of possibility for mercury-polluted groundwater flow to change its direction; study of interaction of contaminated groundwater with bearing strata and underlying aquifers:

 

§         To upgrade and detail the models of groundwater in the Northern industrial area of Pavlodar and contamination of groundwater with mercury;

The model of groundwater of the Northern industrial area of Pavlodar will be converted into updated version of ModFlow GMS 5.0 software. The additional data characterizing the hydrogeological structure of eastern border of the Irtysh River valley will be entered to the model. The detailed local model will be created for the area of Hg contaminated groundwater.  More accurate forecasts will be worked out for the spread of mercury pollution and the risk will be assessed regarding to Hg pollution of the network of water supply wells in Pavlodarskoye village and the Irtysh River floodplain.

 

§         To investigate the possible connection in the aureole of mercury pollution between the groundwater of Low-Medium Pliocene deposits of Pavlodar assise and groundwater of Oligocene deposits of Nekrassovskaya suite;

Additional observation boreholes reaching the second aquifer will be constructed in the area of mercury pollution (special precautions will be taken to avoid pollution of underlying aquifer with Hg). The samples of bearing strata will be taken during boreholes’ drilling for further laboratory studies. Water samples will be taken for the determination of concentrations of Hg and major anions. The threat of spreading mercury via underlying aquifers will be assessed.

 

§         To define more accurately forecast for spread of mercury-containing groundwater in the Northern industrial area of Pavlodar taking into account adsorption/desorption of mercury on bearing strata of aquifers and on surface of basalt clay;

The laboratory experiments will be conducted in order to study the capability of the samples of bearing strata to adsorb/desorb the cationic mercury and chloride complexes of Hg. The modeling of mercury spread with groundwater will be done taking in account the parameters of adsorption/desorption both in the bulk of bearing strata and on the surface of basalt clay.  The forecasts for mercury pollution spread will be detailed for the different scenarios of technogenic changes of hydrogeological conditions in the area of interest.

 

3.  Study of the spread of groundwater plume contaminated with oil products from the territory of Pavlodar Oil Refinery; development of model and assessment of environmental risk posed by oil-products contamination of groundwater in the Northern  industrial area of Pavlodar:

 

§         To facilitate the Laboratory of environmental protection of PCP with the equipment to monitor contamination of groundwater with oil products, and to train the local staff;

The purchase sensitive GC is required as well as necessary accessories and consumables for it in order to determine the oil hydrocarbons in the extracts from groundwater samples. The personnel of PCP will be trained to apply methods allowing determination of oil hydrocarbons at ppb level (i.e. using specially cleaned glassware, clean room practice, quality control/quality assurance procedures including application of special methods etc.). The purchase of sampling equipment and training of PCP staff to apply relevant sampling methods are also required.

 

§         To drill and equip new observation boreholes for groundwater sampling and to do chemical analyses in order to define the direction of spreading the plume of groundwater contaminated with petroleum and oil products;

The most likely direction of the spread of oil products with groundwater will be determined and the cross-section of boreholes will be constructed at right angle to this direction in order to detect the plume of contamination. Using the concurrent drilling and chemical analysis the plume of oil contamination will be contoured and its extent will be estimated.

 

§         To develop the model of spreading the oil products with groundwater in the Northern industrial area of Pavlodar.

Using the updated version of groundwater model in the Northern industrial area of Pavlodar and the results of field research the forecasts for the spread of oil products will be drawn up at various hydrogeological conditions. The risks for the population of Northern outskirts of Pavlodar and for the Irtysh River floodplain will be assessed.

 

4.  Assessment of possibility to contain the risk posed by mercury pollution of the pond Balkyldak including the fish within it:

 

§         To study the mercury contamination of bottom sediments in the pond Balkyldak, and to estimate the amount of deposited mercury;

The vector map of the pond Balkyldak will be created and the sampling plan for bottom sediments will be designed. Bottom sediments from the pond Balkyldak will be sampled (on regular grid during the winter) using the different types of samplers and augers (the samples of silts will be taken from the whole depth, and clay will be sampled from the surface only). The map of contamination of bottom sediments will be created and analyzed using the software package “ArcGIS – Spatial Analysis”.

 

§         To study the food chains of the pond Balkyldak and to assess the bioaccumulation of mercury in aqueous organisms.

The samples of biota will be taken from the pond Balkyldak and the existing food chains will be described. Total mercury content will be determined in biota samples. The pathways of Hg bioaccumulation will be identified and the possible solutions to break these pathways will be developed.

 

5.  To draw up and discuss with local stakeholders the recommendations for the 2nd stage of demercurization and other remediation activities in the area of the former PO “Khimprom” (Northern industrial area of Pavlodar), including the recommendation for abolishment or further safe use of the wastewater storage pond Balkyldak:

 

The work program and obtained results will be discussed with Pavlodar regional department of environmental protection and with the managers of Pavlodar Chemical Plant. The workshops, press-conferences and presentations will help to discuss the interim results. The final results and conclusions will be published in scientific journals (both regional and Western ones) and in mass media.

 

Task 1

Task description and main milestones

Participating Institutions

Study of the movement of mercury in the groundwater rise in depressed area in saturated and unsaturated zones and its accumulation in the shallow ponds and vegetation. Development of management strategy to contain the risk to population in the vicinity and livestock:

·        To facilitate the Laboratory of environmental protection of PCP with the equipment for conduction of mercury monitoring, and to train the local staff.

·        To revise the Program of Post-containment Monitoring by expanding the study of pollution of groundwater and biota, and by adding the tests of  grazing grass and milk.

·        To carry out 3-year monitoring program (sampling and analysis), including the monitoring of soils, surface and ground water, aquatic biota, milk, and grazing grass in the close vicinity of groundwater contamination. To measure the hydrogeological parameters (water levels in boreholes, pH, temperature, redox potential) simultaneously with groundwater sampling.

1 – AIPET

2 – PCP

Description of deliverables

1

Database on sampling and results of chemical analyses

2

Publications in mass media and scientific journal

3

Proposals for the revision of Monitoring Program for 2008-2020

Task 2

Task description and main milestones

Participating Institutions

Assessment of possibility for mercury-polluted groundwater flow to change its direction; study of interaction of contaminated groundwater with bearing strata and underlying aquifers:

·        To convert the model of groundwater of the Northern industrial area of Pavlodar into updated version of ModFlow GMS 5.0 software.

·        To enter into the model the additional data characterizing the hydrogeological structure of eastern border of the Irtysh River valley.

·        To create the detailed local model for the area of Hg contaminated groundwater.

·        To make detailed forecasts for mercury pollution spread taking into account the parameters of adsorption/desorption equilibrium.

·        To assess the risk posed by mercury pollution for the network of water supply wells in Pavlodarskoye village and the Irtysh River floodplain.

·        To construct additional observation boreholes reaching the second aquifer in the area of mercury pollution.

·        To take samples of bearing strata during drilling of additional boreholes and samples of groundwater after drilling for subsequent laboratory experiments.

·        To analyze the samples of groundwater for the concentration of total Hg and major anions.

·        To conduct laboratory study of adsorption equilibrium in the system bearing strata – solution of Hg (II) nitrate and Hg (II) chloride; to perform the leaching tests for adsorbed mercury.

1 – IHH

2 – AIPET

3 – PCP

Description of deliverables

1

Forecasts of mercury pollution spread for different scenarios of technogenic changes of hydrogeological conditions in the area of contamination

2

The results of risk assessment and, if necessary, the proposal for managing the mercury pollution risk for the network of water supply wells in Pavlodarskoye village and the Irtysh River floodplain.

3

Publications in mass media and scientific journal

Task 3

Task description and main milestones

Participating Institutions

Study of the spread of groundwater plume contaminated with oil products from the territory of Pavlodar Oil Refinery; development of model and assessment of environmental risk posed by oil-products contamination of groundwater in the Northern  industrial area of Pavlodar:

·        To facilitate the Laboratory of environmental protection of PCP with the equipment to monitor contamination of groundwater with oil products, and to train the local staff.

·        Basing on the hydrogeological model of the Northern industrial area of Pavlodar to estimate the most likely direction of the plume of oil products with groundwater.

·        To construct the cross-section of boreholes at right angle to plume direction at the distance of 1-1.5 km from the pollution source in order to detect the plume of contamination. To use concurrent drilling of new boreholes and sampling and chemical analysis of groundwater.

·        To contour the plume by creation of the network of observation boreholes in the plume direction. To use concurrent drilling of new boreholes and sampling and chemical analysis of groundwater.

·        To draw up the forecasts for the spread of oil products with groundwater using the hydrogeological model in the Northern industrial area of Pavlodar.

·        To assess the risks posed by groundwater contamination with oil products for the population of Northern outskirts of Pavlodar and for the Irtysh River floodplain.

1 – BML

2 – AIPET

3 – PCP

4 – IHH

 

Description of deliverables

1

Database on sampling and results of chemical analyses

2

Forecasts of oil pollution spread including the scenario of technogenic changes of hydrogeological conditions in the area of contamination.

3

The results of risk assessment and, if necessary, the proposal for managing the oil products pollution risk for the network of water supply wells in Pavlodarskoye village and the Irtysh River floodplain.

4

Publications in mass media and scientific journal

5

Monitoring Program for groundwater pollution with oil products in the Northern industrial area of Pavlodar.

Task 4

Task description and main milestones

Participating Institutions

Assessment of possibility to contain the risk posed by mercury pollution of the pond Balkyldak including the fish within it:

·        To create the vector map of the pond Balkyldak and to design two versions of sampling plan (for summer and winter sampling). To assess the performance of each sampling option and to select the optimal solution.

·        To sample the bottom sediments from the pond Balkyldak by regular grid using the different types of samplers and augers.

·        To create and analyze the map of Hg contamination of bottom sediments using the software package “ArcGIS – Spatial Analysis”.

·        To take the samples of biota from the pond Balkyldak and to describe the existing food chains.

·        To conduct chemical analysis (including the determination of total mercury content) and morphological studies of the taken samples of biota.

·        To identify the pathways of Hg bioaccumulation and to develop the possible solutions to break these pathways.

1 – AIPET

2 – PSU

3 – PCP

Description of deliverables

1

Database on sampling and results of chemical analyses

2

Map of Hg contamination of bottom sediments in the pond Balkyldak. Calculation of the volume of contaminated silts and amount of deposited mercury basing on the analysis by software package “ArcGIS – Spatial Analysis”.

3

The results of risk assessment and the proposal for managing the risk posed by the mercury contamination of the pond Balkyldak.

4

Publications in mass media and scientific journal

Task 5

Task description and main milestones

Participating Institutions

To draw up and discuss with local stakeholders the recommendations for the 2nd stage of demercurization and other remediation activities in the area of the former PO “Khimprom” (Northern industrial area of Pavlodar), including the recommendation for abolishment or further safe use of the wastewater storage pond Balkyldak:

·        To discuss the work program and obtained results with Pavlodar regional department of environmental protection and with the managers of Pavlodar Chemical Plant.

·        To hold the workshops, press-conferences and presentations in order to discuss the interim results.

1 – AIPET

2 – PCP

3 – IHH

4 – PSU

5 – BML

Description of deliverables

1

The recommendations for the 2nd stage of demercurization and other remediation activities in the Northern industrial area of Pavlodar.

2

Publications in mass-media

 

5. Role of Foreign Collaborators/Partners

Collaborator Trevor W. Tanton will be a consultant during coordination and conduction of fieldworks as well as during the stage of risk assessment from contamination by mercury and oil products. He will also participate in drawing up the recommendation on management of such risk.

 

The Partner will carry out activities, monitoring and audit in the whole duration of the project. The Partner will evaluate the possibility of further cooperation after the project finish date.

 

Foreign Partner Paul Randall is a key person in achieving the goals and objectives of the project. Close interrelation is anticipated between the scientists of research laboratories of Kazakhstan and USA. The exchange of materials, scientific data is foreseen, and joint preparation of scientific publications will be carried out. The communications will be done by means of e-mail, telephone, fax and express mail.

 

6. Technical Approach and Methodology

 

During sampling and chemical analyses the methods recommended by US EPA will be used as well as standard procedures on Quality Control/Quality Assurance accepted in the West. Determination of mercury in solid samples will be carried out using AAS analyzer (Lumex RA 915+); AFS analyzer (PS Analytical Millennium Merlin System) will be used for Hg determination in water samples and biological tissues. Chemical analysis of oil products’ concentration in water will be conducted using GC Perkin Elmer Clarus 500.

 

The following methods will be used for the chemical analyses and quality control:

·        US EPA method # 1631 Revision E – for the determination of total Hg in water;

·        US EPA method # 7474 – for the determination of total Hg in biological tissues;

·        US EPA method # 7471 Revision B – for the determination of total Hg in soils, sediments and bottom deposits;

·        US EPA method # 9071 Revision A – for the extraction of petroleum and oil products;

·        US EPA method # 1664 – for the determination of N-Hexane extractable oil products by extraction and gravimetry;

·        Method of the Massachusetts Department of Environmental Protection (MADEP) – for determination of extractable petroleum hydrocarbons (EPH) by Gas Chromatography.

 

Assessment and management of risk associated with groundwater contamination will be carried out using hydrogeological models received by means of the ModFlow GMS 5.0 software. The preliminary assessment of risk (Tier 1 of risk assessment) posed by mercury contamination of pastures and fish will be conducted using the monitoring of the level of mercury pollution and subsequent comparison of pollution indices with existing state standards and guidelines values.

 

7. Technical Schedule

 

 

Quarter 1

Quarter 2

Quarter 3

Quarter 4

Quarter 5

Quarter 6

Quarter 7

Quarter 8

Quarter 9

Quarter 10

Quarter 11

Quarter 12

Person*

days

Task 1

Report

Report

Report

Report

Report

Publication

Report

Report

Report

Report

Publication

Report

Report

Final

report

 

Person*days

213

213

213

213

160

160

160

160

160

160

160

160

2132

Task 2

Report

Report

Report

Report

Report

Report

Report

Report

Report

Report

Report

Publication

Final

report

 

Person*days

185

185

185

185

185

185

185

185

185

185

185

185

2220

Task 3

Report

Report

Report

Report

Report

Report

Report

Report

Report

Report

Report

Publication

Final

report

 

Person*days

224

224

224

224

167

167

167

167

167

167

167

167

2232

Task 4

Report

Report

Report

Report

Report

Publication

Report

Report

Report

Report

Report

Publication

Report

Final

report

 

Person*days

261

262

262

262

155

155

155

155

101

101

101

101

2071

Task 5

 

Report

Report

Report

Report

Publication

Report

Report

Report

Report

Report

Report

Final

report

 

Person*days

0

84

84

84

90

90

90

90

90

90

90

90

972

TOTAL

883

968

968

968

757

757

757

757

703

703

703

703

9627

 

8.2. Managerial responsibilities

 

 

12. Supporting Information

 

Relevant publications of the project participants

1.      S.M.Ullrich, M. A.Ilyushchenko, I.M.Kamberov, V.Yu.Panichkin, T.W.Tanton. Mercury pollution around a chlor-alkali plant in Pavlodar, Northern Kazakhstan. RMZ-Materials and Geoenvironment. Special issue: Mercury as a Global Pollutant. V. 51, N 1, 2004, P. 298-302.

2.      T.W.Tanton, V.V.Veselov, M.A.Ilyushchenko, V.Yu.Panichkin. Risk assessment from mercury contamination of Northern industrial site of Pavlodar city. Reports of National Academy of Sciences of the Republic of Kazakhstan. №4, 2003, P.78-81(Ru).

3.      V.Yu.Panichkin. Geoinformational mathematical model of groundwater mercury contamination in Pavlodar industrial area. Reports of National Academy of Sciences of the Republic of Kazakhstan, Almaty, 2003, N 6, P. 89-97 (Ru).

4.      V.Yu.Panichkin. Technique, technology and results of modeling of groundwater mercury contamination in Pavlodar industrial area. Izvestiya of National Academy of Sciences of the Republic of Kazakhstan. Geological series. Almaty, 2003, N 5, P. 117-124 (Ru).

5.      V.V.Veselov, V.Yu.Panichkin, O.L.Miroshnichenko. Use of GIS-technologies in process of modeling of groundwater mercury contamination in Pavlodar industrial area. Reports of International conference “Mathematical modeling of ecological systems”. Almaty, September 9-12, 2003, P. 94 (Ru).

6.      M.Ilyushchenko, G.A.Uskov, N.A.Zyryanova, S.S.Galushchak, V.A.Skakun. Mercury (Hg) contamination of fish fauna of technical reservoir Balkyldak. Vestnik KazGU. Ecological series, №2 (11), 2002, P. 102-105 (Ru).

7.      M.Ilyushchenko, E.Lapshin, N.Druz. Mercury pollution in industrial centers of Kazakhstan. Safety and quality of life in a large city. Materials of International Scientific and Practical Conference (Almaty, the 26-27 of September 2002). Almaty 2002, P. 106-108 (Ru).

8.      M.Ginzburg, A.Delebarre, A.G.Howard, M.Ilyushchenko, O.Lebedeva, N.Mazhrenova, A.Sarmurzina. The Prospective of utilizing ash and slug wastes of chemical industry, metallurgy and power generation for environmental tasks. Approaches to handling environmental problems4. V.V. Veselov, V.Yu. Panichkin, O.L. Miroshnichenko. Automatic calibration of models  of hydrogeological object. Geology of Kazakhstan. Almaty, 2002, N 6, P. 73-80 (Ru).

9.      V.Yu.Panichkin. Geoinformational mathematical modeling of groundwater mercury contamination in Pavlodar industrial area. Geology of Kazakhstan. Almaty, 2002, N 6, P. 66-72 (Ru).

10.    V.V.Veselov, V.Yu.Panichkin, E.N.Lushin. Investigation of groundwater mercury contamination in Pavlodar industrial area. Reports of International scientific-practical conference “Natural and humanitarian sciences and their role in engineering staff training. Almaty, 2002, P. 173-178 (Ru).

11.    V.Yu.Panichkin. Development of systems of geoinformational mathematical modeling in Kazakhstan. Reports of National Academy of Sciences of the Republic of Kazakhstan, Almaty, 2002, N 2, P. 47-53 (Ru). in the mining and metallurgical regions of NIS countries. Proceedings (Mariupol, 5-7 September 2002). Mariupol 2002. P. 202-213 (En), 138-141 (Ru).

12.    V.V.Veselov, V.Yu.Panichkin, O.L.Miroshnichenko. Automatic calibration of models  of hydrogeological object. Geology of Kazakhstan. Almaty, 2002, N 6, P. 73-80 (Ru).

13.    V.Yu.Panichkin. Geoinformational mathematical modeling of groundwater mercury contamination in Pavlodar industrial area. Geology of Kazakhstan. Almaty, 2002, N 6, P. 66-72 (Ru).

14.    V.V.Veselov, V.Yu.Panichkin, E.N.Lushin. Investigation of groundwater mercury contamination in Pavlodar industrial area. Reports of International scientific-practical conference “Natural and humanitarian sciences and their role in engineering staff training. Almaty, 2002, P. 173-178 (Ru).

15.    V.Yu.Panichkin. Development of systems of geoinformational mathematical modeling in Kazakhstan. Reports of National Academy of Sciences of the Republic of Kazakhstan, Almaty, 2002, N 2, P. 47-53 (Ru).

16.    E.V.Lapshin, T.W.Tanton, M.A.Ilyushchenko, S.Heven. Mercury in Industrial Landscapes of Former USSR: A Case of Kazakhstan. Workshop on the Fate, Transport, and Transformation of Mercury in Aquatic & Terrestrial Environments (West Palm Beach, Florida, 8-10 May 2001). Abstracts. West Palm Beach, Florida 2001, P. 87.

17.    S.A.Abdrashitova, S.A.Aitkeldieva, M.A.Ilyushchenko, S.Heven. Microbiological Processes in Regions of Mercury Contamination: Special Circumstances and Studies in Kazakhstan. Workshop on the Fate, Transport, and Transformation of Mercury in Aquatic & Terrestrial Environments (West Palm Beach, Florida, 8-10 May 2001). Abstracts. West Palm Beach, Florida 2001, P. 88.

18.    S.A.Abdrashitova, E.S.D’yuchkova, S.A.Aitkeldieva, M.A.Ilyushchenko, Yu.I. Paretski. Perspectives of bacteria use for contaminated wastewater cleaning from mercury. Vestnik KazGU. Biological series, №1 (16), 2002, P. 142-147 (Ru).

19.    T.W.Tanton, M.A.Ilyushchenko, S.Heaven. Some water resources issues of Central Kazakhstan. Water and maritime engineering. V.148, № 4, 2001, P. 227-233.

20.    M.Ilyushchenko, L.Yakovleva, S.Heaven, E.Lapshin. Mercury contamination of the Nura River. Promyshlennost Kazakstana. № 3 (6), 2000, P. 56-59 (Ru).

21.    M.A.Ilyushchenko, L.V.Yakovleva, S.A.Abdrashitova, S.Heaven. Problems of technogenic contamination of the Northwest coast of Lake Balkhash. The international ecological forum “Balkhash-2000” (on the problem of Sustainable Development of the Ili-Balkhash Basin, 16-18 November, Almaty 2000). Collection of materials and reports. Part 1. Almaty 2000. C. 381-396 (Ru & En).

22.    M.A.Ilyushchenko, E.V.Lapshin. Interactive Multimedia Presentation “Water resources of the basin of the Rivers Nura and Ishim and the problem of water supply of the city of Astana”. Presentation of results of the World Bank mission. 23 minutes. The presentation was shown on Karaganga television canal TV-3 on the16.08.2000 (Ru).

23.    M.A.Ilyushchenko, S.Heaven, T.W.Tanton. Problems of demercurisation of the River Nura in Central Kazakhstan. In book: International Conference on "Problems of Freshwater Mercury Pollution in Natural and Manmade Reservoirs and Possible Ways for their Remediation" (Irkutsk, 13-16 September 2000). Abstracts of Papers. Vinogradov Institute of Geochemistry SB of RAS, 2000, P. 40-41 (Ru & En).

24.    S.Heaven, M.A.Ilyushchenko, T.W.Tanton, S.M.Ullrich, E.P.Yanin. Mercury in the River Nura and its floodplain, Central Kazakhstan: I. River sediment and water. The Science of the Total Environment, V. 260, 2000, P. 35-44.

25.    S.Heaven, M.A.Ilyushchenko, I.M.Kamberov, M.I.Politikov, T.W.Tanton, S.M.Ullrich, E.P.Yanin. Mercury in the River Nura and its floodplain, Central Kazakhstan: II. Floodplain soils and riverbank silt deposits. The Science of the Total Environment, V. 260, 2000, P. 45-55.

26.    T.W.Tanton, E.P.Yanin, S.Heaven, M.A.Ilyushchenko, S.M.Ullrich. Mercury polluted sediments of the river Nura and its floodplain. In book: Mercury as a Global Pollutant - 5th International Conference (Rio de Janeiro, 23-28 May 1999). Abstracts. Rio de Janeiro, 1999, P. 187.

27.    M.A.Ilyushchenko, S.A.Abdrashitova, T.W.Tanton, S.Heven, E.P.Yanin. Results of research into mercury pollution of the river Nura in Central Kazakhstan and proposals for demercurisation. “Materials of the Second Congress in memory of B.A.Beremzhanov in Chemistry and Chemical Technologies” (Almaty 6-8 September 1999). Vestnik KazGU, Chemistry series, № 5, 1999, P. 18-21. And also: Informational ecological bulletin of the Republic of Kazakhstan. III quarter 1999, P. 57-61 (Ru).

28.    E.Yu.Gumenyuk, M.A.Ilyushchenko, V.A.Zakharov. Technogenic mercury pollution of the Nura River on the data of KazGidromet. Vestnik KazGU, Chemistry series, № 4, 1998, P. 136-147 (Ru).

29.    M.A.Ilyushchenko, S.Heaven, E.P.Yanin. Monitoring and estimation of contamination by mercury of the neighbourhoods of Pavlodar. In book: Geochemical studies of urban agglomerations. M., IMGRE, 1998, P. 59-68  (Ru).

30.    A.Karazhanova, E.P.Yanin, M.A.Ilyushchenko, T.W.Tanton, S.Heaven.  Mercury pollution of the river Nura in Central Kazakstan.  WPMS`97. International conference on water problems in the Mediterranean countries (Nicosia, 17-21 November 1997). Abstracts. Nicosia, North Cyprus, 1997, p. 114.

31.    M.A.Ilyushchenko, S.Heaven. Mercury technogenic geochemical anomalies of Central and North-east Kazakhstan. A review of results of expeditionary studies. In book: Materials of scientific - practical conference "Modern problems of the environment of Central Kazakhstan", dedicated to 25-years of the Karaganda State University of E.A.Buketov (Karaganda, 17-18 October 1996). Karaganda, 1996, p. 157-162 (Ru). And also: Vestnik KazGU, A serial ecological, № 3, 1997, p. 28-30 (Ru).

32.    T.W.Tanton, E.P.Yanin, M.S.Ishankulov, M.A.Ilyushchenko, S.Heaven.  INTAS Project: Study of the mercury of the river Nura with the aim of developing of an effective management strategy for the polluted technogenic sediments. Materials of Sumposium “Modern Problems of Ecologically Pure Technologies and Materials” (Almaty, 12-14 December 1996). Vestnik KazGU, A serial chemical, № 5-6, 1996, p. 273-274. And also: Design of transfer and conservation of mercury-containing technogenic silts of Nura river in Central Kazakhstan. In book: Materials of scientific - practical conference " Modern problems of ecology of Central Kazakhstan", dedicated to 25 years of the Karaganda State University of E.A.Buketov  (Karaganda, 17-18 October 1996). Karaganda, 1996, p. 24-30  (Ru).

33.    M.A.Ilyushchenko, S.Bulatkulov, S.Heaven. Ecogeochemical consequences of contamination of the Nura River in Central Kazakhstan by mercury-containing wastewater from acetyldehyde production. In book: International Conference on “Toxic impacts of waste on the aquatic environment (Loughborough, 14-17 April 1996). Abstracts. Loughborough University, UK, p. 21.

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