Sustainable Generation of Sulfate Radicals and Decontamination of Micropollutants via Sequential Electrochemistry  

作　　者：Wentian Zheng Shijie You Yuan Yao Nanqi Ren Bin Ding Fang Li Yanbiao Liu 

机构地区：[1]College of Environmental Science and Engineering,Donghua University,Shanghai 201620,China [2]State Key Laboratory of Urban Water Resource and Environment,School of Environment,Harbin Institute of Technology,Harbin 150090,China [3]MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage,School of Chemistry and Chemical Engineering,Harbin Institute of Technology,Harbin 150080,China [4]Innovation Center for Textile Science and Technology,College of Textiles,Donghua University,Shanghai 200051,China [5]Shanghai Institute of Pollution Control and Ecological Security,Shanghai 200092,China

出　　处：《Engineering》2023年第11期144-152,共9页工程（英文）

基　　金：supported by the National Natural Science Foundation of China(52170068 and U21A20161);the Open Project of State Key Laboratory of Urban Water Resource and Environment,Harbin Institute of Technology(QAK202108)。

摘　　要：The removal of emerging micropollutants in the aquatic environment remains a global challenge.Conventional routes are often chemically,energetically,and operationally intensive,which decreases their sustainability during applications.Herein,we develop an advanced chemical-free strategy for micropollutants decontamination that is solely based on sequential electrochemistry involving ubiquitous sulfate anions in natural and engineered waters.This can be achieved via a chain reaction initiated by electrocatalytic anodic sulfate(SO_(4)^(2-))oxidation to produce persulfate(S_(2)O_(8)^(2-))and followed by a cathodic persulfate reduction to produce sulfate radicals(SO_(4)^(·-)).These SO_(4)^(·-)are powerful reactive species that enable the unselective degradation of micropollutants and yield SO_(4)^(2-)again in the treated water.The proposed flow-through electrochemical system achieves the efficient degradation(100.0%)and total organic carbon removal(65.0%)of aniline under optimized conditions with a single-pass mode.We also reveal the effectiveness of the proposed system for the degradation of a wide array of emerging micropollutants over a broad pH range and in complex matrices.This work provides the first proof-ofconcept demonstration using ubiquitous sulfate for micropollutants decontamination,making water purification more sustainable and more economical.

关 键 词：Advanced oxidation Chain reaction Sulfate radical MICROPOLLUTANTS Sequential electrochemistry 

分 类 号：X17[环境科学与工程—环境科学]