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http://dx.doi.org/10.9727/jmsk.2014.27.1.31

A Geochemical Study on the Enrichment of Trace Elements in the Saline Ash Pond of a Bituminous-burning Power Plant in Korea  

Kim, Seok-Hwi (Department of Environmental Engineering, Kunsan National University)
Choi, Seung-Hyun (Department of Environmental Engineering, Kunsan National University)
Jeong, Gi Young (Department of Earth and Environmental Sciences, Andong National University)
Lee, Jae-Cheol (Korea Western Power Co., Ltd.)
Kim, Kangjoo (Department of Environmental Engineering, Kunsan National University)
Publication Information
Journal of the Mineralogical Society of Korea / v.27, no.1, 2014 , pp. 31-40 More about this Journal
Abstract
In present study, we geochemically investigated the fresh coal ashes and the saline ash pond of an electric power plant in Korea, which burns imported bituminous coals. The goals are to see the chemical changes of the ash pond by reaction with coal ashes and to investigate the relative leachability of elements from the ashes by reaction with saline waters. For this study, one fresh fly ash, one fresh bottom ash, and 7 water samples were collected. All the ash samples and 2 water samples were analyzed for 55 elements. The results indicated that the fly ashes are enriched with chalcophilic elements such as Cu, Zn, Ga, Ge, Se, Cd, Sb, Au, Pb, and B relative to other elements. On the other hand, concentrations of As, Ba, Co, Ga, Li, Mn, Mo, Sb, U, V, W, and Zr are much higher in the ash pond than those dissolved in the seawater. Ag, Bi, Li, Mo, Rb, Sb, Sc, Se, Sn, Sr, and W show high ratios of elemental concentrations in pond water to those in the fly ash. Our results imply that the leaching of trace elements is regulated by geochemical controls such as solubility and adsorption even though the trace elements are relatively enriched on the ash surfaces after the coal combustion due to their volatilities.
Keywords
Ash pond; Coal ash; Trace metals; Leaching;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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