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In-situ Stabilization of Heavy Metal Contaminated Farmland Soils Near Abandoned Mine, using Various Stabilizing Agents: Column Test Study  

Lee, Sang-Hoon (Department of Environmental Engineering, The Catholic University of Korea)
Cho, Jung-Hoon (Department of Environmental Engineering, The Catholic University of Korea)
Publication Information
Journal of Soil and Groundwater Environment / v.14, no.4, 2009 , pp. 45-53 More about this Journal
Abstract
This study concerned remediation of heavy metal contaminated farmland soils near abandoned mine, using stabilization method, with particular emphasis on the remediating the soils contaminated with multi-elements. In this study, stabilizing heavy metals based on 'In-situ chemical fixation' has been applied to the soil collected from an abandoned mine in Korea, using column test, with various stabilizing agents, including $FeSO_4$, $KMnO_4$, sludge (collected from coal mine drainage treatment pond), zero-valent iron (ZVI), zeolite and $CaCO_3$. Sixty five-days operation of the flow-through columns yield $FeSO_4\;+\;KMnO_4$ and zeolite are efficient on reducing As leaching from the soil. ZVI and sludge are reducing the leaching of Cu. Although $FeSO_4\;+\;KMnO_4$ seem to be efficient for most heavy metals, high pH in the initial stage of test enabled high leaching of the heavy metals, whereas fixation of the heavy metals maintain throughout the rest of the test period, with increasing pH up to around 6. Addition of some alkaline agent may inhibit the low pH during the application. The column test was also run as two set: one set incubated with deionized water for 72 hours prior to starting the test, and the other without incubation. The incubated set demonstrated better stabilizing efficiency, indicating the potential optimized operation method.
Keywords
In-situ stabilization; Farmland; Heavy metal; Column test;
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Times Cited By KSCI : 1  (Citation Analysis)
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