PFASs在地下水中的界面吸附行为研究进展  

Research advances on interphase adsorption of perfluoroalkyl and polyfluoroalkyl substances(PFASs)in groundwater

作　　者：刘世洋 武婉璐 金彪 张干[1,2] LIU Shiyang;WU Wanlu;JIN Biao;ZHANG Gan(State Key Laboratory of Organic Geochemistry,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou,510640,China;CAS Center for Excellence in Deep Earth Science,Guangzhou,510640,China;University of Chinese Academy of Sciences,Beijing,100049,China)

机构地区：[1]中国科学院、广州地球化学研究所、有机地球化学国家重点实验室,广州510640 [2]中国科学院深地科学卓越创新中心,广州510640 [3]中国科学院大学,北京100049

出　　处：《环境化学》2023年第6期1771-1783,共13页Environmental Chemistry

基　　金：国家重点研发计划重点专项(2019YFC1805500)资助.

摘　　要：全氟及多氟烷基化合物(PFASs)是全球关注的一类新污染物,理解PFASs在环境中的迁移、分配、转化过程是预测其环境归趋和风险的重要任务.近年来,越来越多的研究开始关注地下水中PFASs的运移和分配行为.本文系统总结了新近的研究成果和文献,重点总结、归纳了PFASs在地下水中的界面吸附行为,包括固-水界面、空气-水界面和非水相液体(non-aqueous phase liquid,NAPL)-水界面.针对PFASs在3种界面吸附过程以及主控要素进行了详细论述,并得出了相关结论.虽然固-水界面吸附最为重要,但其他两个界面过程也不容忽视.对于不同种类PFASs及不同碳链长度的同类PFASs在界面分配行为各异,直接影响其在地下水中的迁移和分布.影响PFASs多界面过程的要素主要包括吸附介质的性质、PFASs自身的物理化学性质及水化学要素等.最后,立足现有研究成果和盲点,对未来相关研究进行了展望.Perfluoroalkyl and Polyfluoroalkyl Substances(PFASs)are emerging contaminants of global concerns.Understanding their transport,distribution and transformation processes in environment is essential to predict the environmental fate and risk of PFAS.Recently,an increasing number of studies has focused on transport and distribution of PFAS in groundwater.Thus,our study summarizes the relevant literature and recent outcomes,and mainly addresses PFAS adsorption phenomenon at different interfaces associated with groundwater environment,including solid-water interface,air-water interface and NAPL-water interface.Specifically,we demonstrated adsorption behaviors of PFASs and corresponding influential factors,and thus concluding that 1)Even the solidwater interface adsorption has be considered the most important,the other interfacial processes should not be ignored;2)The distribution of PFASs with different functional groups as well as PFASs of different carbon-chain length might vary at individual interfaces,and thus directly influencing their migration and distribution in groundwater;3)The factors controlling PFASs interfacial behavior could be properties of adsorption medium,physiochemical properties of PFAS molecules and water chemistry.To end,we provided outlook for future research based on the current knowledge and blind spots on this topic.

关 键 词：全氟及多氟烷基化合物(PFASs) 地下水 界面吸附 吸附系数 新污染物 

分 类 号：X523[环境科学与工程—环境工程]