Photochemical decomposition of perfluorochemicals in contaminated water

Liu，Xiaoqing1; Wei，Wei1; Xu，Juan2,3; Wang，Dongbo4; Song，Lan5; Ni，Bing Jie1

2020-11-01

10.1016/j.watres.2020.116311

WATER RESEARCH   影响因子和分区

0043-1354

1879-2448

Perfluorochemicals (PFCs) are a set of chemicals containing C-F bonds, which are concerned due to their bioaccumulation property, persistent and toxicological properties. Photocatalytic approaches have been widely studied for the effective removal of PFCs due to the mild operation conditions. This review aims to provide a comprehensive and up-to-date summary on the homogenous and heterogeneous photocatalytic processes for PFCs removal. Specifically, the homogenous photocatalytic methods for remediating PFCs are firstly discussed, including generation of hydrated electrons (e) and its performance and mechanisms for photo-reductive destruction of PFCs, the active species responsible for photo-oxidative degradation of PFCs and the corresponding mechanisms, and metal-ion-mediated (Fe(III) mainly used) processes for the remediation of PFCs. The influences of molecular structures of PFCs and water matrix, such as dissolved oxygen, humic acid, nitrate, chloride on the homogenous photocatalytic degradation of PFCs are also discussed. For heterogeneous photocatalytic processes, various semiconductor photocatalysts used for the decomposition of perfluorooctanoic acid (PFOA) are then discussed in terms of their specific properties benefiting photocatalytic performances. The preparation methods for optimizing the performance of photocatalysts are also overviewed. Moreover, the photo-oxidative and photo-reductive pathways are summarized for remediating PFOA in the presences of different semiconductor photocatalysts, including active species responsible for the degradation. We finally put forward several key perspectives for the photocatalytic removal of PFCs to promote its practical application in PFCs-containing wastewater treatment, including the treatment of PFCs degradation products such as fluoride ion, and the development of noble-metal free photocatalysts that could efficiently remove PFCs under solar light irradiation.

Heterogeneous Homogenous Perfluorochemicals Photo-oxidative Photo-reductive Photocatalytic processes

SCI ; EI

英语

其他

Australian Research Council (ARC) Future Fellowship[FT160100195]

Engineering ; Environmental Sciences & Ecology ; Water Resources

Engineering, Environmental ; Environmental Sciences ; Water Resources

WOS:000589968700022

PERGAMON-ELSEVIER SCIENCE LTD

20203409088416

Solar light ; Degradation ; Water pollution ; Fluorine compounds ; Metal ions ; Precious metals ; Iron compounds ; Chlorine compounds ; Wastewater treatment

Industrial Wastes Treatment and Disposal:452.4 ; Water Pollution:453 ; Metallurgy:531.1 ; Precious Metals:547.1 ; Solar Energy and Phenomena:657.1 ; Chemical Reactions:802.2

ENVIRONMENT/ECOLOGY

2-s2.0-85089577044

Scopus

1.Centre for Technology in Water and Wastewater,School of Civil and Environmental Engineering,University of Technology Sydney,Sydney,2007,Australia
2.Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration,Zhejiang Tiantong Forest Ecosystem National Observation and Research Station,School of Ecological and Environmental Sciences,East China Normal University,Shanghai,200241,China
3.Institute of Eco-Chongming,ChenJiazhen,No. 20 Cuiniao Road,202162,China
4.Key Laboratory of Environmental Biology and Pollution Control,College of Environmental Science and Engineering,Hunan University,Changsha,410082,China
5.School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Liu，Xiaoqing,Wei，Wei,Xu，Juan,et al. Photochemical decomposition of perfluorochemicals in contaminated water[J]. WATER RESEARCH,2020,186.

Liu，Xiaoqing,Wei，Wei,Xu，Juan,Wang，Dongbo,Song，Lan,&Ni，Bing Jie.(2020).Photochemical decomposition of perfluorochemicals in contaminated water.WATER RESEARCH,186.

Liu，Xiaoqing,et al."Photochemical decomposition of perfluorochemicals in contaminated water".WATER RESEARCH 186(2020).