人体净化
激进的
电化学
硫酸盐
化学
环境化学
废物管理
有机化学
工程类
电极
物理化学
作者
Wentian Zheng,Shijie You,Yuan Yao,Nanqi Ren,Bin Ding,Fang Li,Yanbiao Liu
出处
期刊:Engineering
[Elsevier]
日期:2023-01-10
卷期号:30: 144-152
被引量:33
标识
DOI:10.1016/j.eng.2022.12.005
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 (SO42−) oxidation to produce persulfate (S2O82−) and followed by a cathodic persulfate reduction to produce sulfate radicals (SO4̇−). These SO4̇− are powerful reactive species that enable the unselective degradation of micropollutants and yield SO42− 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-of-concept demonstration using ubiquitous sulfate for micropollutants decontamination, making water purification more sustainable and more economical.
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