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Electrokinetic Extraction of Heavy Metal from Clayey Soil : Desorption Characteristics During Electrical Treatment  

Lee, Myung-Ho (Department of Civil & Environmental Engineering, Hanyang University)
Jang, Yeon-Soo (Department of Civil & Environmental Engineering, Dongguk University)
Publication Information
Journal of Soil and Groundwater Environment / v.12, no.3, 2007 , pp. 23-28 More about this Journal
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.
Keywords
clayey soil; electrokinetic remediation; pH; precipitation; sorption/desorption;
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