污染地下水可渗透反应墙(PRB)技术研究进展

Study on permeable reactive barrier technology for the remediation of polluted groundwater

地下水污染已成为我国严峻的环境问题,治理污染地下水工作迫在眉睫。可渗透反应墙(permeable reactive barrier,PRB)技术是污染地下水修复的新兴技术,具有治理效果好、造价低廉、对生态环境影响小等特点,能够有效去除地下水中的有机氯化物、重金属和无机离子等。PRB技术在美国已广泛应用到工程领域并实现商业化,在我国目前处于实验室研究和现场示范应用阶段。综述了PRB技术的原理、结构类型、活性填料、修复机理和工程应用,指出PRB系统长期有效运行存在的技术问题,以及PRB技术的应用前景和重点研究方向,以期为PRB技术在我国的研发和推广应用及地下水污染治理提供参考。

With the increasingly serious environmental problem of groundwater pollution in China,the remediation of polluted groundwater is extremely urgent.Permeable reactive barrier(PRB)is a new technology for groundwater remediation of contaminated sites,which can effectively remove organic chlorides,heavy metals and inorganic ions with the advantages of good treatment effect,low cost and little impact on ecology and environment.PRB technology has been widely used in the engineering field and commercialized in the United States,which is currently used in the laboratory research and field-pilot demonstration in China.The contaminants-removing principles,structure types,active packing materials,reactive mechanism and engineering application of PRB system were summarized,and the technical issues of long-term effective performance of PRB system,as well as the application prospects and key research directions of PRB technology were pointed out,so as to provide references for the R&D and application of PRB technology and the remediation of polluted groundwater in China.