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Enhanced formation of trihalomethane disinfection byproducts from halobenzoquinones under combined UV/chlorine conditions
Zhao, He1,2; Huang, Ching-Hua2; Zhong, Chen1; Du, Penghui1,3; Sun, Peizhe2,4
2022-06-01
Source PublicationFRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING
ISSN2095-2201
Volume16Issue:6Pages:11
AbstractHalobenzoquinones (HBQs) are highly toxic disinfection byproducts (DBPs) and are also precursors of other DBPs such as trihalomethanes (THMs). The formation of THMs from HBQs during chlorine-only and UV/chlorine processes with or without bromide was investigated experimentally. Density functional theory (DFT) reactivity descriptors were also applied to predict the nucleophilic/electrophilic reactive sites on HBQs and intermediates. The results were combined to explain the different behaviors of 2,6-dichloro-1,4-benzoquinone (2,6-DCBQ) and tetrachloro-1,4-benzoquinone (TCBQ) and to propose mechanism for the promoting roles of UV and hydroxylation of HBQs in THMs formation. Under UV/chlorine, UV significantly enhanced THMs formation from 2,6-DCBQ compared to chlorine-only, mainly due to the production of OH-DCBQ*. Excited 2,6-DCBQ* by UV benefited nucleophilic hydrolysis to produce OH-DCBQ*, which favored electrophilic attack by chlorine, thereby inducing more THMs formation. UV/chlorine modestly promoted THMs formation from TCBQ compared to chlorine-only. Hydroxylation of TCBQ and UV irradiation were both important in promoting THMs formation due to the high electrophilic property of OH-TCBQ and TCBQ*. Meanwhile, hydroxylation of HBQs and CHCl3 formation were enhanced at higher pH. This work suggested that enhanced formation of THMs from HBQs should be considered in the application of combined UV and chlorine processes.
KeywordHalobenzoquinone Trihalomethane Chlorine disinfection UV irradiation Disinfection byproducts Combined UV/chlorine
DOI10.1007/s11783-021-1510-7
Language英语
WOS KeywordMEDIUM-PRESSURE UV ; CHLOROFORM FORMATION ; BROMO-BENZOQUINONES ; CHLORINE TREATMENT ; OXIDATION PROCESS ; ORGANIC-MATTER ; DEGRADATION ; TRANSFORMATION ; WATER ; INACTIVATION
Funding ProjectNational Natural Science Foundation of China[51978643] ; Youth Innovation Promotion Association, CAS[2014037]
WOS Research AreaEngineering ; Environmental Sciences & Ecology
WOS SubjectEngineering, Environmental ; Environmental Sciences
Funding OrganizationNational Natural Science Foundation of China ; Youth Innovation Promotion Association, CAS
WOS IDWOS:000706141500001
PublisherHIGHER EDUCATION PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/50525
Collection中国科学院过程工程研究所
Corresponding AuthorHuang, Ching-Hua
Affiliation1.Chinese Acad Sci, Beijing Engn Res Ctr Proc Pollut Control, Inst Proc Engn, Div Environm Technol & Engn, Beijing 100190, Peoples R China
2.Georgia Inst Technol, Sch Civil & Environm Engn, Atlanta, GA 30332 USA
3.Southern Univ Sci & Technol, Sch Environm Sci & Engn, State Environm Protect Key Lab Integrated Surface, Shenzhen 518055, Peoples R China
4.Tianjin Univ, Sch Environm Sci & Engn, Tianjin 300072, Peoples R China
Recommended Citation
GB/T 7714
Zhao, He,Huang, Ching-Hua,Zhong, Chen,et al. Enhanced formation of trihalomethane disinfection byproducts from halobenzoquinones under combined UV/chlorine conditions[J]. FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING,2022,16(6):11.
APA Zhao, He,Huang, Ching-Hua,Zhong, Chen,Du, Penghui,&Sun, Peizhe.(2022).Enhanced formation of trihalomethane disinfection byproducts from halobenzoquinones under combined UV/chlorine conditions.FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING,16(6),11.
MLA Zhao, He,et al."Enhanced formation of trihalomethane disinfection byproducts from halobenzoquinones under combined UV/chlorine conditions".FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING 16.6(2022):11.
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