Migration and extraction of heavy metal from contaminated natural clay by electrokinetics

초록

This paper presents a experimental study on an electrokinetic extraction for removal of contaminant from natural clay spiked with lead. A series of laboratory experiments including variable conditions such as operating duration, applied electrical current, concentration of lead, and applications of three different chemicals, were performed. 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 effciency 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.