- Evaluation of Processing Fluids on Electrokinetic remediation of Cu, Pb, As-contaminated soil
- Park, Geun-Yong;Kim, Do-Hyung;Baek, Ki-Tae;
- Department of Environmental Engineering, Kumoh National Institute of Technology;Department of Environmental Engineering, Kumoh National Institute of Technology;Department of Environmental Engineering, Kumoh National Institute of Technology;
- Cu, Pb, As 복합 중금속오염 토양의 전기동력학적 정화에서 전해질의 영향 평가
- 박근용;김도형;백기태;
- 금오공과대학교 환경공학과;금오공과대학교 환경공학과;금오공과대학교 환경공학과;
Abstract
Electrokinetic technology was applied to remediate Cu, Pb and As-contaminated paddy soil. Removal of metal is highly dependent on the processing fluid during electrokinetic treatment. Tap water, NaOH, $HNO_3$ , $Na_2EDTA$ , and citric acid were evaluated as the processing fluids to enhance metal removal. Cu and Pb were transported toward cathode, however, it did not removed from soil section, while 56.6% of As was removed at a acidic condition. The strong acidic condition with nitric acid as a processing fluid enhanced the desoprtion of As from soil surface. However, longer operation time is needed to get the higher removal of Cu and Pb, and the acidification of soil after electrokinetic treatment should be solved.
Keywords: Electrokinetic remediation;Multi-metal contaminated soil;Processing fluids;pH control;
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