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KMID : 1024520040130010061
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Journal of the Environmental Sciences
2004 Volume.13 No. 1 p.61 ~ p.68
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Effect of Heavy Metal Species on the Removal of Cu, Pb, and Cd Contaminated Soils Using Electrokinetic Process
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Shin Hyun-Moo
Yoon Sam-Seok
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Abstract
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Three kinds of toxic heavy metals, such as lead, copper, and cadmium, existing abundantly in contaminated soils were selected to investigate pH change, electroosmotic flow, and the removal rate in the application of electrokinetic process. In the change of pHs, they reached to about 12 and 2 at each cathodic and anodic region, respectively, and maintained for reaction being proceeded. Electroosmotic flow rates were not influenced by the kind of metal species but by electropotential gradient. On the soils contaminated by each metal, the removal rate of Cd was the fastest among three as in the order of Cd>Pb>Cu. While on the soils contaminated by mixed metal species, Cu was the fastest. Metal species transported by electrokinetic processes were distributed in between 0.9 and 1.0 of normalized region. In the case of soils contaminated by one kind of metal. the relative concentrations of Pb and Cd estimated in between normalized region 0.9 and 1.0 were 5.2 and 5.7, respectively.
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KEYWORD
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Electrokinetic remediation, Heavy metal, Electroosmosis, Contaminated soil
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