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Synchronous mineralization of three aqueous non-steroidal anti-inflammatory drugs in electrochemical advanced oxidation process

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Chinese Chemical Letters 2022年第8期33卷 3701-3704页

作者： Lei Xu Xinyue Cui Jianbo Liao Yufeng Liu Baoyi Jiang Junfeng Niu Research Center for Eco-Environmental Engineering Dongguan University of TechnologyDongguan 523808China

electrochemical degradation performances of three non-steroidal anti-inflammatory drugs(NSAIDs),acetaminophen(ACT),aspirin(ASP)and ibuprofen(IBP),were investigated and compared in their alone and mixture conditions using Ti/SnO_(2)-Sb/La-PbO_(2).The pseudo-first-order degradation kinetics(k)order was k_(IBP-A)(0.110 min^(-1))>k_(ASP-A)(0.092 min^(-1))>k_(ACRT-A)(0.066 min^(-1))in their alone condition,while that was k_(ACT-M)(0.088 min^(-1))>k_(ASP-M)(0.063 min^(-1))>k_(IBP-M)(0.057 min^(-1)) in their mixture ***·OH apparent production rate constant of 5.23 mmol L^(-1)min^(-1)m^(-2) and an electrical energy per order(E_(EO)) value of 6.55 Wh/L could ensure the synchronous degradation of the NSAIDs *** mineralization efficiency of NSAIDs mixture was 86.9%at 240 min with a mineralization current efficiency of 1.67%.Acetic acid and oxalic acid were the main products in the mineralization process for the both *** the mixture condition,there were higher k values at lower initial concentrations and higher current density,while the presence of carbonate and humic acid inhibited their *** results indicated electrochemical advanced oxidation process can effectively and synchronously mineralize NSAIDs mixture in wastewater.

关键词： electrochemical advanced oxidation Non-steroidal anti-inflammatory drugs Degradation kinetics Synchronous mineralization Wastewater

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The electrochemical advanced oxidation processes coupling of oxidants for organic pollutants degradation: A mini-review

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Chinese Chemical Letters 2019年第12期30卷 2139-2146页

作者： Jun Li Yangju Li Zhaokun Xiong Gang Yao Bo Lai State Key Laboratory of Hydraulics and Mountain River Engineering College of Architecture and EnvironmentSichuan UniversityChengdu 610065China Sino-German Centre for Water and Health Research Sichuan UniversityChengdu 610065China Institute of Environmental Engineering RWTH Aachen UniversityAachen 52072Germany

The electrochemical advanced oxidation processes(EAOPs) have been extensively applied in the treatment of organic pollutants ***,the mini review provides the coupling systems about EAOPs and different oxidants(e.g.,persulfate(PS),peroxymonosulfate(PMS),and ozone(O3)),including EAOPs-PS systems,EAOPs-PMS systems,EAOPs-peroxone systems,and photoelectro-oxidants systems,for the organic compounds *** coupling system of EAOPs with oxidants is an effective way to improve the generated free radicals(e.g.,HO^·and SO4^·-) concentration and to accelerate pollutant *** this review,we make a summary of the homogeneous and heterogeneous EAOPs-oxidant *** reaction mechanisms of EAOPs combined with different oxidants are elucidated in detail,as well as the synergistic effect for improving the degradation and mineralization efficiency.

关键词： electrochemical advanced oxidation processes Organic compounds Oxidants Free radicals Reaction mechanism

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