目前污染地下水的修复技术正处于多种技术联合以及复杂污染场地修复的研究阶段。本课题拟以污染地下水中常见的氯代有机溶剂PCE为研究对象，选择助溶剂强化冲洗技术与厌氧还原脱氯生物修复技术联合对其污染地下水进行修复研究。在研究助溶剂强化冲洗技术去除污染源中大量的非水溶相PCE能力和效果的基础上，研究残存PCE对微生物毒性的降低程度、残存助溶剂提供电子供体的能力、助溶剂对PCE的溶解度、脱附性能增加的机理、PCE和电子供体的混合程度以及两种技术的有效结合问题；同时研究残存PCE的生物还原脱氯修复效能；探明还原脱氯混合菌群的组成、演变、不同菌之间的协同作用关系及其对PCE的脱氯机理；通过投加营养、电子供体、能将一氯乙烯转化为乙烯的脱氯菌以及降低氧化还原电位方法解决二氯乙烯和一氯乙烯积累的问题。本项目的研究，可为氯代有机溶剂污染场地的修复提供技术和理论支持。

Nowadays, remediation technologies of contaminated groundwater are in the stage of multiple technology application and comprehensive site restoration. In this project, integration of co-solvent flushing technology and anaerobic reductive dechlorination technology is selected to deal with PCE contaminated groundwater, which is a kind of common pollutant in polluted groundwater. First of all, based on the study of removing large masses of PCE from contaminated source using co-solvent flushing technology, toxicity reduction of residual PCE to microbes, ability of co-solvent providing electron donor, enhancing desorption and increasing solubility, degree of co-solvent and PCE mixing and problems of the two techniques effective combination will be studied. Second, bioremediation of residual PCE also will be studied. Third, the structure changing of dechlorination consortium and dechlorination mechanism of combination different consortium will be demonstrated. Last, the problem of DCE and VC accumulation will be solved by injection nutrients, electron donor, dehalococcoides and reduction of redox potential. If this project is sponsored, we will provide technical and theoretical support for the remediation of chlorinated organic solvent contaminated sites.