Impact of ozonation on disinfection byproducts formation from phenylalanine during chlorination  

作　　者：Sinong Huang Hongwei Liu Kunming Wei Liang Zhang Xiaoyan Ma Qingsong Li Xueyan Li Andrea M.Dietrich 

机构地区：[1]College of Civil Engineering,Zhejiang Key Laboratory of Civil Engineering Structures&Disaster Prevention and Mitigation Technology,Zhejiang University of Technology,Hangzhou 310023,China [2]Water Resources and Environmental Institute,Xiamen University of Technology,Xiamen 361005,China [3]School of Environmental Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,China [4]Civil and Environmental Engineering,Virginia Polytechnic Institute and State University,Blackburg,VA 24061,USA

出　　处：《Journal of Environmental Sciences》2024年第10期199-211,共13页环境科学学报（英文版）

基　　金：This research is supported by the National Natural Science Foundation of China(No.51678527);the Natural Science Foundation of Zhejiang Province of China(No.LY19E080019);the Xinmiao Talent Program of Zhejiang Province(No.2022R403C093);Engineering Research Center of Ministry of Education for Renewable Energy Infrastructure Construction Technology.

摘　　要：As a strong oxidizing agent,ozone is used in some water treatment facilities for disinfection,taste and odor control,and removal of organic micropollutants.Phenylalanine(Phe)was used as the target amino acid to comprehensively investigate variability of disinfection byproducts(DBPs)formation during chlorine disinfection and residual chlorine conditions subsequent to ozonation.The results showed that subsequent to ozonation,the typical regulated and unregulated DBPs formation potential(DBPsFP),including trichloromethane(TCM),dichloroacetonitrile(DCAN),chloral hydrate(CH),dichloroacetic acid(DCAA),trichloroacetic acid(TCAA),and trichloroacetamide(TCAcAm)increased substantially,by 2.4,3.3,5.6,1.2,2.5,and 6.0 times,respectively,compared with only chlorination.Ozonation also significantly increased the DBPs yield under a 2 day simulated residual chlorine condition that mimicked the water distribution system.DBPs formations followed pseudo first order kinetics.The formation rates of DBPs in the first 6 hr were higher for TCM(0.214 hr^(−1)),DCAN(0.244 hr^(−1)),CH(0.105 hr^(−1)),TCAcAm(0.234 hr^(−1)),DCAA(0.375 hr^(−1))and TCAA(0.190 hr^(−1))than thereafter.The peak DBPsFP of TCM,DCAN,CH,TCAcAm,DCAA,and TCAA were obtained when that ozonation time was set at 5–15 min.Ozonation times>30 min increased the mineralization of Phe and decreased the formation of DBPs upon chlorination.Increasing bromine ion(Br^(−1))concentration increased production of bromine-DBPs and decreased chlorine-DBPs formation by 59.3%–92.2%.Higher ozone dosages and slight alkaline favored to reduce DBP formation and cytotoxicity.The ozonation conditions should be optimized for all application purposes including DBPs reduction.

关 键 词：OZONE Amino acids CHLORINATION Disinfection by-products 

分 类 号：X703.5[环境科学与工程—环境工程]