UV/peroxymonosulfate(UV/PMS)advanced oxidation process has attracted significant at-tention for removal of micropollutants in water.However,during practical water treatment applications,the PMS treatment must be performed before the UV treatment to achieve full contact.In this study,sulfamethoxazole(SMX)was selected as the target micropol-lutant.Four different operational approaches,including UV alone,PMS alone,simultane-ous UV/PMS and sequential PMS-UV,were compared for their differences in SMX removal and disinfection by-product(DBP)formation potentials during chlorine-driven disinfection.Among the four approaches,UV/PMS and PMS-UV achieved over 90％removal efficiencies for SMX without substantial differences.For raw water,the trichloronitromethane(TCNM)formation potential after treatment with PMS-UV was lower than that after UV/PMS treat-ment.The time interval over which the PMS-UV process was conducted had little effect on the final removal efficiency for SMX.However,a brief(5 min)pre-PMS treatment signifi-cantly reduced the TCNM formation potential and the genotoxicity from DBPs.The forma-tion risk for TCNM during chlorination increased markedly with increasing PMS dosages,and the appropriate dosage under these experimental conditions was suggested to be 0.5-1.0 mmol/L.Under alkaline conditions,PMS-UV treatment can enhance SMX degradation as well as dramatically reduced the formation potentials for haloketones,haloacetonitriles and halonitromethanes.This study suggests that proper optimization of UV/PMS processes can remove SMX and reduce its DBP formation.

Tian-Yang Zhang;Yong-Shan Lu;Zhen-Ning Luo;Wen-Jun Sun;Bin Xu;Chen-Yan Hu;Yu-Lin Tang;Zheng-Yu Dong;Xiao-Meng Ren

State Key Laboratory of Pollution Control and Resource Reuse,Key Laboratory of Yangtze Water Environment,Ministry of Education,College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China;Shanghai Institute of Pollution Control and Ecological Security,Shanghai 200092,China;School of Environment,Tsinghua University,Beijing 100084,China;College of Environmental and Chemical Engineering,Shanghai University of Electric Powrer,Shanghai 200090,China;PLA Naval Medical Center,Shanghai 200433,China

环境科学学报（英文版）

[1]Tian-Yang Zhang;Yong-Shan Lu;Zhen-Ning Luo;Wen-Jun Sun;Bin Xu;Chen-Yan Hu;Yu-Lin Tang;Zheng-Yu Dong;Xiao-Meng Ren-.Micropollutant removal and disinfection byproduct control by sequential peroxymonosulfate-UV treatment in water:A case study with sulfamethoxazole)[J].环境科学学报（英文版）,2022(07):141-150

Micropollutant,micropol,trichloronitromethane,genotoxicity,haloketones,haloacetonitriles,halonitromethanes

removal,disinfection,byproduct,control,sequential,peroxymonosulfate,UV,treatment,water,case,study,sulfamethoxazole,PMS,advanced,oxidation,has,attracted,significant,tention,micropollutants,However,during,practical,applications,must,performed,before,full,contact,In,this,SMX,was,selected,target,Four,different,operational,approaches,including,alone,simultane,ous,were,compared,their,differences,formation,potentials,chlorine,driven,Among,four,achieved,over,efficiencies,without,substantial,For,raw,TCNM,after,lower,that,interval,which,conducted,had,little,effect,final,efficiency,brief,pre,cantly,reduced,from,DBPs,risk,chlorination,increased,markedly,increasing,dosages,appropriate,under,these,experimental,conditions,suggested,Under,alkaline,enhance,degradation,well,dramatically,This,suggests,proper,optimization,processes,remove,its

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