Removal of lead from contaminated Korean marine clay by electrokinetic remediation technology

초록

A series of electrokinetic remediation experiments including variable conditions such as operating duration, electrical current, concentration of lead, and applications of three different chemicals were performed to demonstrate the efficiency of lead removal from natural marine clay sampled in Korea. The experiment results showed that the amounts of hydrogen ions and electroosmotic water flow transported from anode to cathode increased with increasing in the operating duration and the applied electrical current, and with decreasing in the initial concentration of lead. The efficiency of heavy metal removal from the contaminated soil was increased with increasing in the operating duration, the applied electrical current, and the initial lead concentration. The chemicals used as deprecipitating, complexing, and solubilizing agents were efficient in removal of lead from the soil. Here arises a suggestion that injection of such chemicals could be effective in removal of heavy metals from the soil as an auxiliary method in electrokinetic remediation.