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http://dx.doi.org/10.5467/JKESS.2011.32.2.170

A Biogeochemical Study of Heavy Metal Leaching from Coal Fly Ash Disposed in Yeongdong Coal-Fired Power Plant  

Chung, Duk-Ho (Science Education Institute for the Gifted, Chonbuk National University)
Cho, Kyu-Seong (Division of Science Education, Chonbuk National University)
Park, Kyeong-Jin (Division of Science Education, Chonbuk National University)
Publication Information
Journal of the Korean earth science society / v.32, no.2, 2011 , pp. 170-179 More about this Journal
Abstract
Fly ashes derived from coal fired power plants have unique chemical and mineralogical characteristics. The objective of this research was to study how indigenous bacteria affected heavy metal leaching in fly ash slurry during the fly ash-seawater interactions in the ash pond located in Yeongdong seashore, Korea. The in-situ pH of ash pond seawater was 6.3-8.5. For this study, three sites of the ash pond were chosen to collect a sample of fly ash slurry. Three samples that had a mix of fly ash (0.4 L) and seawater (1.6 L) were collected at each site. First sample was autoclaved ($120^{\circ}C$, 2.5 atm), second one was inoculated with glucose to stimulate the microbial activity, and the last sample was kept in the natural condition. Compared with other samples including autoclaved and natural samples, the glucose added sample showed sharp increase in its alkalinity after 15 days, cation concentration change such as Ca, Mg, and K seemed to increase in early stage, and then decrease 15 days later in slurry solution of glucose added sample, and a possibly considerable decrease in $SO_4^{2-}$ in the fly ash slurry samples when glucose was added to stimulate the microbial activity. Geochemical data of this study is likely to be related to the activity of bacteria at the ash pond. The result may be used to understand about the characteristic of bacteria.
Keywords
fly ash; heavy metals; biogeochemistry; microbial leaching;
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1 Bottrell, S.H. and Morton, M.D.B., 1992, A reinterpretation of the genesis of the Cae Coch pyrite deposit, North Wales. Journal of the Geological Society, London, UK, 149, 581-584.   DOI
2 Stumn, W. and Morgan, J.J., 1996, Aquatic Chemistry. 3rd ed, John Wileys and Son, NY, USA, 1022 p.
3 Tributsch, H., 2001, Direct versus indirect bioleaching. Hydrometallurgy, 59, 177-185.   DOI
4 Vassilev, S.V., Eskenazy, G.M., and Vassileva, C.G., 2000, Contents, modes of occurrence and behaviour of chlorine and bromine in combustion wastes from coal-fired Power Plants. Fuel, 79, 923-937.   DOI
5 Vassilev, S.V. and Vassileva, C.G., 1997, Geochemistry of coals, coal ashes and combustion wastes from coal-fired Power Plants. Fuel Process Technology, 51, 19-45.   DOI
6 Yoon, C.H., Oh, K.C., Kim, Y.W., and Shin, B.S., 1995, Content of Heavy Metals in Coal Fly Ash from the Samcheonpo and the Seocheon Power Plant. Economic Environmental Geology, 28, 147-154.
7 White, C., Sayer, J.A., and Gadd, G.M., 1997, Microbial solubilization and immobilization of toxic metals: Key biogeochemical processes for treatment of contamination. FEMS microbiology reviews, 20, 503-516.   DOI
8 Lee, G.H., Choi, S.K., Moon, H.S., and Lee, S.H., 1997, Mineralogical and Geochemical Characteristics of PFA(Pulverised Fuel Ash) from Yongwol Power Plant. Economic Environmental Geology, 30, 443-450.
9 Lee, J.H., Seo, H.N., Kim, C.R., Kim, N.J., and Min, K.S., 2001, Characteristics of OPC-Fly ash-Slag System. Cement Symposium, 28, 47-53.
10 Mattigod, S.V., Dhanpat, Rai, Eary, L.E., and Ainsworty, C.C., 1990, Geochemical factors controlling the mobilization of inorganic constituents from fossil fuel combustion residues: Review of the major elements. Journal of Environmental Quality, 19, 188-201.
11 Nelson, E.G., 2004, Principles of environmental geochemistry. Tomson Brooks/Cole, USA, 514 p.
12 Nickson, R.T., McArthur, J.M., Ravenscroft, P., Burgess, W.G., and Ahmed, K.M., 2000, Mechanism of arsenic release to groundwater, Bangladesh and West Bengal. Applied Geochemistry, 15, 403-413.   DOI
13 Reijnders, L., 2005, Disposal, uses and treatments of combustion ashes: A review. Resources, Conservation and Recycling, 43, 313-336.   DOI
14 Roethel, F.J.and Oakley, S.A., 1985, Effects of seawater on the mineralogical and chemical composition of coalwaste blocks. In Duedall, I.W., Kester, D.R., Park, P.K., and Ketchum, B.H. (eds.), Wastes in the Ocean, Vol. 4, Energy Wastes in the Ocean. Wiley, NY, USA, 691-704.
15 Cho, K.S., Roh, Y., and Chung, D.H., 2007, A Biogeochemical study on the heavy metal leaching from coal fly ash disposed by Dangjin fire plant in the coastal environment. Journal of Korean Earth Society, 28, 112-122.   과학기술학회마을   DOI
16 Roh, Y., Lauf, R.J., and Phelps, T.J., 2001, Utilization of biomineralization processes with fly ash for carbon sequestration. First National Conference on Carbon Sequestration, Washington, D.C., May, 15-17.
17 Roh, Y., Moon, J.W., Song, Y., and Moon, H.S., 2003a, Biomineralization processes using fly ash for carborn sequestration. Journal of Mineralogical Society of Korea, 16, 171-180.
18 Roh, Y., Lauf, R.J., and Phelps, T.J., 2003b, Biogeochemical processes utilizing fly ash for carbon sequestration. Second National Conference on Carbon Sequestration, Washington, D.C., May, 14-17.
19 Eary, L.E., Dhanpat, Rai, Mattigod, S.V., and Ainsworty, C.C., 1990, Geochemical factors controlling the mobilization of inorganic constituents from fossil fuel combustion residues. Journal of Environmental Quality, 19, 202-214.
20 Gay, A.J. and Davis, P.B., 1987, Some environmental aspects of coal fly ash. Coal science and technology, 20, 221-243.
21 Han, O.H., Chun, H.S., and Yoon, R.H., 2001, Development of a Electrostatic Separation Technology for Removal of Unburned Carbon from Fly Ash. Journal of the Korean Institute of Mineral and Energy Resources Engineers, 38, 416-423.
22 Hansen, L.D. and Fisher, G.L., 1980, Elemental distribution in coal fly ash particles. Environmental Science and Technology, 14, 1111-1117.   DOI
23 Hjelmar, O., 1990, Leachate from land disposal of coal fly ash. Waste Management and Research, 8, 429-449.   DOI
24 Konhauser, K.O., 1998, Diversity of bacterial iron mineralization. Earth Science Review, 43, 91-121.   DOI
25 Hockly, D.E. and Van Der Sloot, H.A., 1991, Long-term processes in stabilized coal waste block exposed to sea water. Environmental Science and Technology, 25, 1408-1414.   DOI
26 Hulett, L.D. and Weinberger, A.J., 1980, Some etching studies of the microstructure and composition of large aluminosilicate particles in fly ash from coal-burning power plants. Environmental Science and Technology, 14, 965-970.   DOI
27 Kim, K.J., Yeo, S.G., Yun, S.T., and Hwang, G.S., 2002, Geochemical Study on the Fly Ash-Seawater Reaction. Proceeding of the Annual Joint Conference: Petrological Society of Korea and Mineralogical Society of Korea, 70-73.