Can perfluorooctanoic acid be effectively degraded using β-PbO2 reactive electrochemical membrane?

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外文摘要：Aqueous perfluorooctanoic acid(PFOA)elimination has raised significant concerns due to its persistence and bioaccumulation.Although β-PbO2 plate anodes have shown efficient mineralization of PFOA,it re-mains unclear whether PFOA can be effectively degraded using β-PbO2 reactive electrochemical mem-brane(REM).Herein,we assessed the performance of Ti/SnO2-Sb/La-PbO2 REM for PFOA removal and proposed a possible degradation mechanism.At a current density of 10mA/cm2 and a membrane flux of 8500(liters per square meter per hour,LMH),the degradation efficiency of 10mg/L PFOA was merely 8.8%,whereas the degradation efficiency of 0.1mg/L PFOA increased to 96.6% .Although the porous struc-ture of the β-PbO2 REM provided numerous electroactive sites for PFOA,the generated oxygen bubbles in the pores could block the pore channels and adsorb PFOA molecules.These hindered the protonation process and significantly impeded the degradation of high-concentration PFOA.Quenching experiments indicated that·OH played dominant role in PFOA degradation.The electrical energy per order to re-move 0.1mg/L PFOA was merely 0.74 Wh/L,which was almost an order of magnitude lower than that of other anode materials.This study presents fresh opportunities for the electrochemical degradation of low-concentration PFOA using β-PbO2 REM.

外文关键词：

Perfluorooctanoic acidβ-PbO2Reactive electrochemical membraneElectrochemical oxidation

作者：

Xubin Qian、Lei Xu、Xu Ge、Zhun Liu、Cheng Fang、Jianbing Wang、Junfeng Niu

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作者单位：

College of Environmental Science and Engineering,North China Electric Power University,Beijing 102206,China

College of Water Resources and Hydropower Engineering,North China Electric Power University,Beijing 102206,China

Research Center for Eco-Environmental Engineering,Dongguan University of Technology,Dongguan 523808,China

Global Centre for Environmental Remediation(GCER),University of Newcastle,Callaghan,NSW 2308,Australia

School of Chemical and Environmental Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China

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基金：

National Key Research and Development ProgramNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaFundamental Research Funds for the Central UniversitiesAustralian Research Council

项目编号：

2022YFE01357005200002852370076519786582023MS063G180200015

出版年：

2024

DOI：

10.1016/j.cclet.2023.109218

中国化学快报(英文版)

中国化学会

中国化学快报(英文版)

CSTPCD

影响因子：0.771

ISSN：1001-8417

年,卷(期)：2024.35(7)