• Electrokinetic Extraction of Heavy Metal from Clayey Soil : Desorption Characteristics During Electrical Treatment
  • Lee, Myung-Ho;Jang, Yeon-Soo;
  • Department of Civil & Environmental Engineering, Hanyang University;Department of Civil & Environmental Engineering, Dongguk University;
  • 중금속으로 오염된 점성토에서 동전기프로세스에 의한 탈착 특성
  • 이명호;장연수;
  • 한양대학교 토목환경공학과;동국대학교 토목환경공학과;
Abstract
A number of batch isotherm and electrokinetic experiments were conducted in order to investigate the migration of zinc and its removal efficiency during electrokinetic soil processing. Sorption and desorption characteristics of zinc spiked kaolin clay have been examined by comparison with electrically induced desorption and precipitation occurring in the anode and cathode regions, respectively. The removal efficiency of zinc under the applied voltage gradient of 300 V/m was found to be up to approximately 80 % within 4 hours of the electrokinetic treatment. The study is significant with respect to the remediation of contaminated areas.

동전기적 처리에 의한 무기 오염 물질의 이동 및 제거율을 조사하기 위해 일련의 흡착/탈착 실험 및 동전기 정화 실험을 실시하였다. 동전기적 효과로 인해 발생된 양극 부근에서의 탈착 현상 및 음극 부근에서의 침전 현상을 중금속으로 오염된 점토 시료의 흡착 및 탈착 특성과 비교하여 분석하였다. 제거 효율은 300 V/m의 전압구배로 약 4시간의 동전기적 처리 결과 80% 정도의 높은 제거 효율을 확인할 수 있었다.

Keywords: clayey soil;electrokinetic remediation;pH;precipitation;sorption/desorption;

Keywords: 점성토;동전기 정화;침전;흡착/탈착;

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This Article

  • 2007; 12(3): 23-28

    Published on Jun 30, 2007