Kinetics and mechanisms of non-radically and radically induced degradation of bisphenol A in a peroxymonosulfate-chloride system  

作　　者：Zhao Song Yu Zhang Yanhu Yang Yidi Chen Nanqi Ren Xiaoguang Duan 

机构地区：[1]State Key Laboratory of Urban Water Resource and Environment,Shenzhen Key Laboratory of Organic Pollution Prevention and Control,School of Civil and Environmental Engineering,Harbin Institute of Technology(Shenzhen),Shenzhen,518055,PR China [2]School of Materials and Environmental Engineering,Shenzhen Polytechnic University,Shenzhen,518055,PR China [3]School of Chemical Engineering,The University of Adelaide,Adelaide,SA,5005,Australia

出　　处：《Environmental Science and Ecotechnology》2024年第6期191-197,共7页环境科学与生态技术（英文）

基　　金：Key-Area Research and Development Program of Guangdong Province(No.2023B0101200004);Shenzhen Science and Technology Innovation Program(No.RCBS20210706092219047,GXWD20231129122140001,KQTD20190929172630447,2022A1515110698,and RCBS 20221008093229033);National Natural Science Foundation of China(No.52000053);Open Project of State Key Laboratory of Urban Water Resources and Environment(QA202440).

摘　　要：Bisphenol A,a hazardous endocrine disruptor,poses significant environmental and human health threats,demanding efficient removal approaches.Traditional biological methods struggle to treat BPA wastewater with high chloride(Cl^(-))levels due to the toxicity of high Cl^(-)to microorganisms.While persulfate-based advanced oxidation processes(PS-AOPs)have shown promise in removing BPA from high Cl^(-)wastewater,their widespread application is always limited by the high energy and chemical usage costs.Here we show that peroxymonosulfate(PMS)degrades BPA in situ under high Cl^(-)concentrations.BPA was completely removed in 30 min with 0.3 mM PMS and 60 mM Cl^(-).Non-radical reactive species,notably free chlorine species,including dissolved Cl_(2)(l),HClO,and ClO−dominate the removal of BPA at temperatures ranging from 15 to 60℃.Besides,free radicals,including•OH and Cl_(2)^(•−),contribute minimally to BPA removal at 60°C.Based on the elementary kinetic models,the production rate constant of Cl_(2)(l)(32.5 M^(−1) s^(−1))is much higher than HClO(6.5×10^(−4) M^(−1) s^(−1)),and its degradation rate with BPA(2×10^(7) M^(−1) s^(−1))is also much faster than HClO(18 M^(−1) s^(−1)).Furthermore,the degradation of BPA by Cl_(2)(l)and HClO were enlarged by 10-and 18-fold at 60℃ compared to room temperature,suggesting waste heat utilization can enhance treatment performance.Overall,this research provides valuable insights into the effectiveness of direct PMS introduction for removing organic micropollutants from high Cl^(-)wastewater.It further underscores the critical kinetics and mechanisms within the PMS/Cl⁻system,presenting a cost-effective and environmentally sustainable alternative for wastewater treatment.

关 键 词：BPA removal Saline wastewater PEROXYMONOSULFATE Free chlorine Kinetic model 

分 类 号：X703[环境科学与工程—环境工程]