重金属污染土壤的电动原位修复技术研究

电动力学修复技术作为一种新型的修复技术,由于其处理土壤污染的高效性,近几年来受到了越来越多的关注。综述了电动力学修复技术原理及近几年来其在重金属修复中的最新研究进展,阐述了电动力学修复技术相对于其它修复技术的优势,并指出了电动修复技术中需要克服的技术障碍,探讨了其大规模商业应用的可行性。电动技术能够强化土壤物质的传质过程,能够高效、快速定向迁移土壤中重金属离子达到去除的目的;同时电动技术可以与其它修复技术结合发展出系列组合修复技术,具有广泛的应用前景。从单一电动到复合电动是今后电动力学技术发展的重要方向。目前对污染物质复合电动力学效应下的迁移机理及模型、不同土壤性质(组分、酸碱性等)对于污染物质去除效率及其调控措施的研究仍需进一步深入。

Research progress on enhancement of in situ remediation of heavy metal by electrokinitics

Electrokinetic remediation is a new and innovative technology. Because of its high efficiency in removing contaminants from soil and groundwater, in recent years, it has been paid more and more attention to. This paper reviewed the principle of electrokinetic in situ remediation of contaminated groundwater and soils by electrokinetics and its newest advances in research and applications, expatiated on the advantages of this technology over other technologies, pointed out the obstacles to overcome in using this technology, and discussed the possibilities in full-scale commercial applications. Electrokinetics can enhance the mass-transfer process, thus remove the heavy metal to a given direction fast and efficiently; meanwhile electrokinetics can combine other remediation technology, thus possessing broad application foreground. It is the research trend from single electrokinetics to combined electrokinetics. Nowadays, research on migration mechanism, model of contaminants and impact of the soil property (component, acid/base property) on the contaminant removal efficiency still needs to be furthered.