还原-氧化协同降解全/多卤代有机污染物  

Synergistically Consecutive Reduction and Oxidation of Per-and Poly-Halogenated Organic Pollutants

作　　者：王楠[1] 周宇齐 姜子叶 吕田钰 林进 宋洲 朱丽华[1] Nan Wang;Yuqi Zhou;Ziye Jiang;Tianyu Lv;Jin Lin;Zhou Song;Lihua Zhu(School of Chemistry and Chemical Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;Hubei Province Geological Experimental Testing Center,Wuhan 430034,China)

机构地区：[1]华中科技大学化学与化工学院,武汉430074 [2]湖北省地质实验测试中心,武汉430034

出　　处：《化学进展》2022年第12期2667-2685,共19页Progress in Chemistry

基　　金：国家自然科学基金面上项目(No.21976063,22076052);湖北省自然科学基金面上项目(No.2019CFB432)资助。

摘　　要：全/多卤代有机污染物大多具有生态毒性、生物蓄积性、环境持久性及长距离迁移性,不仅危害环境与生态安全,而且可经食物链传递威胁人类健康。由于卤原子是吸电子基团且取代数目多,这类物质的最高占据分子轨道能较低,难于被氧化降解,相反较易被还原法脱卤降解。随卤原子取代数减少,脱卤产物难被进一步还原,而其毒性甚至高于母体污染物。注意到低卤代有机物更容易发生氧化降解,一些研究构建了还原-氧化接力降解体系,即先利用还原法将全/多卤代有机污染物还原为低卤代产物,再利用氧化法降解这些中间产物,从而实现深度/完全脱卤和矿化。本文根据催化反应类型对还原-氧化联用法进行了归纳,分类介绍了基于传统化学催化、光催化、电化学、光电化学及机械化学等构建还原-氧化协同降解体系的原理及应用,以期为开发高效的处置技术提供思路和建议。Most of per-and poly-halogenated organic pollutants(PHOPs)possess biodiversity and bioaccumulation,long persistency and global transport throughout the environment and pose adverse effects on humans.Due to the strong electron-withdrawing ability and a large number of halogen atoms,PHOPs usually possess low positive position for highest occupied molecular orbital level and consequently are resistant to the oxidative degradation.Reductive technologies can efficiently degrade PHOPs,but they suffer from a problem of the accumulation of highly toxic less halogenated products,because the lower-halogenated products tend to be more difficult to reduce.In contrast,these lowly-halogenated products can be easily oxidized.Thus,the consecutive reduction and oxidation method has been developed to degrade PHOPs,in which the pre-reduction of PHOPs and the consecutive oxidation of dehalogenated intermediates are combined to realize the complete dehalogation and mineralization.Herein,this review summarizes the latest efforts to develop consecutive reduction and oxidation processes that are categorized as five types:catalysis,electrochemistry,photocatalysis,photoelectrochemistry and mechanochemistry.Particular attention is focused on the chemical design principles of consecutive reduction and oxidation processes that can help develop treatment technologies to efficiently eliminate PHOPs.

关 键 词：卤代有机污染物 降解 还原脱卤 氧化 活性氧自由基 

分 类 号：O643.36[理学—物理化学]