基于膨润土系阻隔屏障的地下水有机污染修复研究进展

Bentonite-based barriers for organic contaminated groundwater interception:an overview

工业场地地下水挥发性和半挥发性有机污染修复难度大、成本高,目前缺少经济有效、可以大面积工程应用的处理技术。膨润土系阻隔屏障技术是一种新型的地下水有机污染修复技术,该技术造价低廉,可实现污染地下水持续原位阻控,为后续处理提供长期缓冲。综述了近年来膨润土系阻隔屏障修复地下水有机污染的工艺参数、功能实现和材料更新,扼要分析了其作用机理及影响因素,以期为该技术工程化应用和未来研究方向提供思路。

The remediation of volatile and semi-volatile organic pollution in groundwater at industrial sites presents great difficulties and high costs,with a lack of cost-effective treatment technologies that can be applied on a large engineering scale.Bentonite-based barrier technology is a new type of organic contaminated groundwater remediation technology,which is cost-effective for continuous in situ control of contaminated groundwater and provides a long-term buffer for subsequent treatment.The process parameters,functional realization and material update of bentonite-based barrier for organic contaminatied groundwater remediation in recent years are reviewed,and its mechanism of action and influencing factors are briefly analyzed to provide ideas for the engineering application and future research directions.