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KMID : 1156220070330010075
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Journal of Environmental Health Sciences
2007 Volume.33 No. 1 p.75 ~ p.81
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Effect of Sonication and Reducing Agent Addition on Soil Washing of Heavy Metals-contaminated Soil
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Hwang Seon-Suk
Park Joon-Seok
Namkoong Wan
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Abstract
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This research was conducted to estimate the effect of sonication and reducing agent addition on soil washing of heavy metals-contaminated soil. Sonication trained in soil washing did not significantly increased extraction efficiency of heavy metal compared to soil washing only. The extraction efficiency of sonication trained in soil washing was 12% increased for Pb in 0.01M EDTA leaching solution. Pb and Cd showed higher extraction efficiency in case of reducing agent treatment with mechanical shaking than that with sonication. However, the extraction efficiency of Cu and Zn in case of reducing agent treatment with sonication was over 2 times higher than that in with soil washing. Therefore, application of reducing agent addition with sonication or mechanical shaking should be decided differently for pretreatment of soil washing, according to the kind of heavy metal. It was estimated that sonication after adding reducing agent could increase removal efficiency of Zn or Cu-contaminated soil and shorten the treatment time.
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KEYWORD
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sonication, soil washing, heavy metal, reducing agent
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