STUDY OF ELECTROKINETIC REMEDIATION OF SIMULATED CADMIUM CONTAMINATED SOIL

A preliminary investigation of physico-chemical properties of the soil has been made. An electrokinetic remediation experiment uses cation exchange membrane to control the pH of the operating soils and to enrich and reclaim the heavy metals. It is shown that eclectic current can effectively break up the chelation bounds of heavy metal and soil particles. Electrokinetic remediation is an effective way to remove heavy metals from soil. In this work, soil was electrolyzed at pH=5.0 and species of cadmium element in soil were tested. The results shown that cadmium is concentrated in cathode region and removed from anode region. The removal rate is more than 99% in anode region. It is shown that electric field can improve the effects of remediation, and the electrokinetic remediation is a promising technology for soil restoration.