重金属污染土壤电动力学修复技术研究进展

Research Progress on the Electro-kinetic Remediation of Soil Polluted by Heavy Metal

近年来我国土壤重金属污染日益严重,在重金属污染土壤修复的技术中电动力学修复技术是污染场地修复中最有前景的技术之一。综述了重金属污染土壤的电动力学修复技术的类型及其优缺点,如极性交换技术、逼近阳极技术、注入缓冲溶液技术,以及电动力学修复的联用技术及其优缺点,如电动力学-可渗透反应墙联合修复、电动力学-吸附联合修复、电动力学-离子交换膜联合修复、电动力学-螯合联合修复、电动力学-生物联合修复等技术,并探讨了电动力学修复重金属污染土壤过程中的各种影响因素,评价了电动力学修复土壤领域存在的问题和不足,提出了该领域今后研究的发展方向。

Recently soil heavy metal pollution is becoming more and more serious in China. Among the Remediation Technology for soil polluted by heavy metal, electro-kinetic remediation is one of the most promising technologies. This paper summarizes the types,advantages and disadvantages of electro-kinetics remediation technologies,such as electrode switching technology,approximation of anode technology and injection of buffer solution technology, and summarizes the types, advantages and disadvantages of some enhanced electro kinetics remediation technologies by coupling other techniques, such as electro-kinetics-permeable reactive barrier remediation, electro-kinetics-adsorption remediation, electro kinetics ion exchange remediation, electro-kinetics-chelating remediation and electro-kinetics-bioremediation. Finally, the paper discusses several impact factors and problems of electro-kinetic remediation, evaluates the shortcomings of the application of electro-kinetic in the remediation for soil polluted by heavy metal and puts forward the direction of the development in future.