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http://dx.doi.org/10.7857/JSGE.2020.25.1.053

A Feasibility Assessment of CMDS (Coal Mine Drainage Sludge) in the Stabilization of Mercury Contaminated Soil in Mine Area  

Koh, Il-Ha (National Environment Lab. (NeLab))
Kwon, Yo Seb (National Environment Lab. (NeLab))
Moon, Deok Hyun (Department of Environmental Engineering, Chosun University)
Ko, Ju In (Institute of Mine Reclamation Technology, Mine Reclamation Corporation)
Ji, Won Hyun (Institute of Mine Reclamation Technology, Mine Reclamation Corporation)
Publication Information
Journal of Soil and Groundwater Environment / v.25, no.1, 2020 , pp. 53-61 More about this Journal
Abstract
This study assessed the feasibility of coal mine drainage sludge (CMDS) as a stabilizing agent for mercury contaminated soil through pot experiments and batch tests. In the pot experiments with 43 days of lettuce growth, the bioavailability of mercury in the amended soil and mercury content of the lettuce were decreased by 46% and 50%, respectively. These results were similar to those of the soil amended with the sulfide compound (FeS) generally used for mercury stabilization. Thus, CMDS could be an attractive mercury stabilizer in terms of industrial by-product recycling. Batch tests were conducted to examine mercury fractionation including reactions between the soil and acetic acid. The result showed that some elemental fraction changed to strongly bounded fraction rather than residual (HgS) fraction. This made it possible to conclude that mercury adsorption on oxides in CMDS was the major mechanism of stabilization.
Keywords
Mercury; Stabilization; CMDS (coal mine drainage sludge); Bioavailability; Fractionation;
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