摘要
全氟与多氟烷基化合物(PFAS)是近年来受到全球关注的持久性有机污染物(POPs),具有很强的持久性,生物累积性,显著人体健康及生态环境风险,但传统高级氧化技术对其降解作用有限,这对现有水处理系统具有很大挑战.水合电子(e_(aq)-)是一种强还原性物质,对PFAS具有强亲和力.紫外-亚硫酸盐,紫外-碘化钾等多种光生水合电子技术可引发C-C,C-F键断裂,实现PFAS的降解.本文基于对光生水合电子还原降解水中PFAS技术包括发展历程,研究进展及技术优缺点等多个方面的分析与总结,阐述了水质参数(pH值,溶解氧,共存物质,温度等)及PFAS分子结构(碳原子数,官能团,杂原子等)对PFAS降解效率和路径的影响,展望了相关基础研究与技术工程应用的主要挑战与发展方向,为实现水中PFAS高效降解提供技术参考.
Per-and polyfluoroalkyl substances(PFAS)are a class of persistent organic pollutants(POPs)that have garnered global attention in recent years,they have strong persistence,bioaccumulation and pose significant risks to human health and the ecological environment.However,PFAS are resistant to degradation by conventional advanced oxidation technologies,This poses a challenge to existing water treatment systems.Hydrated electron(eaq⎯)has emerged as a potent reducing agent with a high affinity for PFAS.Several technologies,such as UV/sulfite and UV/potassium iodide,have been developed to generate hydrated electron through photo-induced reactions.These technologies effectively break the carbon-carbon(C-C)and carbon-fluorine(C-F)bonds,leading to the degradation of PFAS.This article provides an analysis and summary of the progress in research,development and technical advantages and disadvantages of various photo-generated hydrated electron reduction technologies for PFAS degradation in water.It delves into the influence of water quality parameters(e.g.,pH,dissolved oxygen,coexisting substances,temperature)and molecular structures(e.g.,carbon atom number,functional groups,heteroatoms)on the efficiency and pathways of PFAS degradation.Additionally,it discusses the major challenges and future directions for fundamental research and engineering applications in this field.The aim is to provide a technical reference for achieving efficient PFAS degradation in water.
作者
杨烨
包一翔
胡嘉敏
吴敏
钟金魁
李井峰
YANG Ye;BAO Yi-xiang;HU Jia-min;WU Min;ZHONG Jin-kui;LI Jing-feng(School of Environmental and Municipal Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;State Key Laboratory of Water Resource Protection and Utilization in Coal Mining,National Institute of Clean and Low Carbon Energy,Beijing 102211,China;Key Laboratory of Yellow River Water Environment of Gansu Province,Lanzhou 730070,China)
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2024年第2期877-893,共17页
China Environmental Science
基金
国家自然科学基金青年基金资助项目(52100070)
国家能源集团科技创新项目(GJNY-21-43)。
关键词
水合电子
PFAS
还原降解
机理
展望
新污染物
hydrated electrons
PFAS
reductive degradation
mechanism
prospect
emerging pollutants
