Can perfluorooctanoic acid be effectively degraded usingβ-PbO_(2)reactive electrochemical membrane?  

作　　者：Xubin Qian Lei Xu Xu Ge Zhun Liu Cheng Fang Jianbing Wang Junfeng Niu 

机构地区：[1]College of Environmental Science and Engineering,North China Electric Power University,Beijing 102206,China [2]College of Water Resources and Hydropower Engineering,North China Electric Power University,Beijing 102206,China [3]Research Center for Eco-Environmental Engineering,Dongguan University of Technology,Dongguan 523808,China [4]Global Centre for Environmental Remediation(GCER),University of Newcastle,Callaghan,NSW 2308,Australia [5]School of Chemical and Environmental Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China

出　　处：《Chinese Chemical Letters》2024年第7期196-199,共4页中国化学快报（英文版）

基　　金：financially supported by the National Key Research and Development Program(No.2022YFE0135700);the National Natural Science Foundation of China(Nos.52000028,52370076 and 51978658);the Fundamental Research Funds for the Central Universities(No.2023MS063);Australian Research Council(No.G180200015)。

摘　　要：Aqueous perfluorooctanoic acid(PFOA)elimination has raised significant concerns due to its persistence and bioaccumulation.Althoughβ-PbO_(2)plate anodes have shown efficient mineralization of PFOA,it remains unclear whether PFOA can be effectively degraded usingβ-PbO_(2)reactive electrochemical membrane(REM).Herein,we assessed the performance of Ti/SnO_(2)-Sb/La-PbO_(2)REM for PFOA removal and proposed a possible degradation mechanism.At a current density of 10 mA/cm2and a membrane flux of 8500(liters per square meter per hour,LMH),the degradation efficiency of 10 mg/L PFOA was merely8.8%,whereas the degradation efficiency of 0.1 mg/L PFOA increased to 96.6%.Although the porous structure of theβ-PbO_(2)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 remove 0.1 mg/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 usingβ-PbO_(2)REM.

关 键 词：Perfluorooctanoic acid β-PbO_(2) Reactive electrochemical membrane Electrochemical oxidation 

分 类 号：X703[环境科学与工程—环境工程] O646[理学—物理化学]