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A Study on the Removal of Heavy Metals from Groundwater Using Permeable Reactive Barriers Based on Nano FeS  

Jung, Gwan-Ju (Department of Environmental Engineering, University of Seoul)
Choi, Sang-Il (Department of Environmental Engineering, Kwangwoon University)
Lee, Jai-Young (Department of Environmental Engineering, University of Seoul)
Publication Information
Journal of Soil and Groundwater Environment / v.14, no.6, 2009 , pp. 19-28 More about this Journal
Abstract
The acid mine drainage (AMD) and landfill leachates released into the subsurface environment can result in serious environmental problems like soil and groundwater contamination. The AMD and the leachates of landfill were known to contain many heavy metals. In this study, the author assessed the reactivity and ability of the FeS coated-ALC for the removal of contaminants (As, Cd, Cu, Pb, Ni, Zn, Al) in AMD and leachates in landfill. The synthetic nano-FeS and Autoclaved Lightweight Concrete (ALC) were used as reactive materials in the permeable reactive barriers(PRBs). The result of batch test indicated that synthetic nano-FeS can remove 99% of heavy metals for the 1hr of reaction time except for As and Ni(about 90%). However, the 80% of As and Ni was removed in column 1(FeS coated-ALC). The column 2(Ore FeS) removed more than 99% of heavy metals. The pH of the column 1 was increased from 3.51 to 6.39~6.50, and the pH with column 2 was increased from 3.51 to 9.20. As the result of this study, the author can surmise that the synthetic nano-FeS coated ALC will use as a very good reactive material of the PRBs to treat the contaminated groundwater with AMD and leachate of landfill.
Keywords
Synthetic Nano FeS; Heavy Metal; Groundwater; Permeable Reactive Barriers;
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