电动力学修复污染土壤的改进技术

针对传统电动力学修复污染土壤技术存在的不足,在介绍电动力学技术修复机理的基础上综述了相关的改进技术。大量研究表明:实验装置添加工作液循环系统、工作电极布置形成非均匀电场、土壤中添加改良剂或表面活性剂、修复过程中调节pH值等技术改进均可提高电动力学修复效率;采用原电池代替电源的方法可达到减少能源消耗的目的;电动力学修复技术与其他修复技术联合可扬长补短。未来研究中应加强不同性质土壤的电动力学修复机理研究,以便较少破坏土壤结构和有机质;加大与其他修复技术联合方式的研究力度。

Improved Techniques for Electrokinetic Remediation of Contaminated Soils

Aiming at deficiencies of traditional electrokinetic remediation technology the improvement of the re-mediation technology are reviewed on the basis of the principles of electrokinetics. A lot of research has demon-strated that adding working-liquid circulation system on the experiment device,using the non-uniform electric field,adding the soil improver or surfactant in soil and adjusting the pH of the working liquid were in favour of soil remediation. The electric field which is created in the galvanic cell rather than the power could reduce en-ergy consumption. The combined methods could make best use of advantages and bypass the disadvantages. The principles of electrokinetics in remeding the soil which were different in property is deserved to further study in futurein order to damage to soil structure and organic matter less,and stepping up studying the combined meth-ods is also important.