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Removal of Heavy Metal and Organic Substance in Contaminated Soils by Electrokinetic and Ultrasonic Remediation  

Chung, Ha-Ik (Geotechnical Engrg., Dept., Korea Institute of Construction Technology)
Publication Information
Journal of the Korean Geotechnical Society / v.19, no.3, 2003 , pp. 83-91 More about this Journal
Abstract
The electrokinetic technique has been applied to remove mainly the heavy metal and the ultrasonic technique to remove mainly organic substance in contaminated soil. In this study, the combined electrokinetic and ultrasonic remediation technique was studied far the removal of heavy metal and organic substance in contaminated soils. This study emphasized the coupled effects of electrokinetic and ultrasonic techniques on migration as well as remediation of contaminants in soils. The laboratory soil flushing tests combining electrokinetic and ultrasonic technique were conducted using specially designed and fabricated devices to determine the effect of both of these techniques. A series of laboratory experiments involving the simple, electrokinetic, ultrasonic, and electrokinetic & ultrasonic flushing test were carried out. A soil admixed with sand and kaolin was used as a test specimen, and Pb and ethylene glycol were used as contaminants of heavy metal and organic substance. An increase in out flow, permeability and contaminant removal rate was observed in electrokinetic and ultrasonic flushing tests. Some practical implications of these results are discussed in terms of technical feasibility of in situ implementation of electrokinetic ultrasonic remediation technique.
Keywords
Contamination; Elcectrokinetic; Ground; Pollutant; Remediation; Ultrasonic;
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