Dynamic electrode reconfiguration promotes in situ electrochemical peracetic acid synthesis for selective water decontamination

被引：0

作者：

Yan, Hanlin ^{[1
]}

Liu, Xiaoguang ^{[1
]}

Zong, Yang ^{[1
,2
]}

Lei, Zhendong ^{[1
]}

He, Qunbiao ^{[1
]}

Zhao, Zhenyu ^{[1
]}

Zhou, Zhengwei ^{[1
]}

Ye, Guojie ^{[1
]}

Hou, Chengsi ^{[1
]}

Wu, Deli ^{[1
,3
]}

机构：

[1] Tongji Univ, Coll Environm Sci & Engn, State Key Lab Pollut Control & Resources Reuse, Key Lab Urban Water Supply Water Saving & Water En, Shanghai 200092, Peoples R China

[2] Univ Sci & Technol China, Dept Environm Sci & Engn, CAS Key Lab Urban Pollutant Convers, Hefei 230026, Peoples R China

[3] Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China

来源：

WATER RESEARCH | 2025年 / 275卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Peracetic acid; In situ electrochemical synthesis; Electrochemical activation; Active" electrode; High-valent metal species; Acetylperoxyl radical; WASTE-WATER; ADVANCED OXIDATION; UV/PERACETIC ACID; OXYGEN EVOLUTION; DEGRADATION; TEMPERATURE; KINETICS; PATHWAY; PH;

D O I：

10.1016/j.watres.2025.123205

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In situ synthesis and activation of peracetic acid (PAA) for water decontamination is a promising way to overcome the transport and storage problems in PAA applications. Here, an in situ electrochemical PAA synthesis and activation system is constructed using RuO2-Ti "active" electrode and graphite plate as the anode and the cathode, respectively. PAA is efficiently generated at the RuO2-Ti anode with a maximum real-time concentration of similar to 1020 mu M and a negligible precursor loss of 2.91 % after 180 min, and can be activated at the cathode to destruct a refractory pollutant (i.e., benzoic acid (BA)) with the rate constant of 0.22-0.28 h(-1), even under the interference of co-existing anions. Multiple pieces of evidence, including differential electrochemical mass spectrometry, sulfoxide probing test, and electron paramagnetic resonance spectroscopy, indicate that the oxygen-atom-transferring oxidation of CH3COO- by a high-valent ruthenium-oxo intermediate (i.e., RuO3) in situ formed through the electrode reconfiguration between RuO2 and chem-sorbed HO center dot mainly accounts for PAA synthesis. Acetylperoxyl radical (CH3C(O)OO center dot) was evidenced as the dominant species for BA degradation. This study proposes an in situ strategy to electrochemically synthesize and activate PAA for selective water decontamination and enriches the understandings of the mechanism of "active" electrode in peroxide synthesis.

引用

页数：11

共 68 条

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