DOI: 10.1016/j.watres.2018.01.028
Scopus记录号: 2-s2.0-85044110983
论文题名: Removals of pesticides and pesticide transformation products during drinking water treatment processes and their impact on mutagen formation potential after chlorination
作者: Matsushita T. ; Morimoto A. ; Kuriyama T. ; Matsumoto E. ; Matsui Y. ; Shirasaki N. ; Kondo T. ; Takanashi H. ; Kameya T.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 138 起始页码: 67
结束页码: 76
语种: 英语
英文关键词: Activated carbon adsorption
; Coagulation and sedimentation
; Disinfection by-product
; Ozonation
; Removal mechanisms
; Toxicity
Scopus关键词: Activated carbon
; Activated carbon treatment
; Adsorption
; Chemical water treatment
; Chlorination
; Coagulation
; Graphene
; Hydrophobicity
; Molecular orbitals
; Ozone
; Ozone water treatment
; Ozonization
; Pesticides
; Potable water
; Regression analysis
; Removal
; Toxicity
; Activated carbon adsorption
; Coagulation and sedimentation
; Coefficient of determination
; Disinfection by-product
; Drinking water treatment process
; Highest occupied molecular orbital
; Lowest unoccupied molecular orbital
; Removal mechanism
; Water pollution control
; activated carbon
; drinking water
; graphene
; mutagenic agent
; ozone
; pesticide
; carbon
; chlorine
; mutagenic agent
; pesticide
; adsorption
; chlorination
; coagulation
; disinfection
; drinking water
; experimental study
; laboratory method
; molecular analysis
; mutagenicity
; pesticide
; pollutant removal
; sedimentation
; toxicity
; transformation
; water treatment
; adsorption
; agriculture
; Article
; chlorination
; electron
; hydrophobicity
; liquid chromatography-mass spectrometry
; mass fragmentography
; mutagenicity
; ozonation
; priority journal
; water treatment
; adsorption
; chemistry
; halogenation
; procedures
; water management
; water pollutant
; Adsorption
; Carbon
; Chlorine
; Halogenation
; Mutagens
; Ozone
; Pesticides
; Water Pollutants, Chemical
; Water Purification
英文摘要: Removal efficiencies of 28 pesticide transformation products (TPs) and 15 parent pesticides during steps in drinking water treatment (coagulation–sedimentation, activated carbon adsorption, and ozonation) were estimated via laboratory-scale batch experiments, and the mechanisms underlying the removal at each step were elucidated via regression analyses. The removal via powdered activated carbon (PAC) treatment was correlated positively with the log Kow at pH 7. The adjusted coefficient of determination (r2) increased when the energy level of the highest occupied molecular orbital (HOMO) was added as an explanatory variable, the suggestion being that adsorption onto PAC particles was largely governed by hydrophobic interactions. The residual error could be partly explained by π-π electron donor–acceptor interactions between the graphene surface of the PAC particles and the adsorbates. The removal via ozonation correlated positively with the energy level of the HOMO, probably because compounds with relatively high energy level HOMOs could more easily transfer an electron to the lowest unoccupied molecular orbital of ozone. Overall, the TPs tended to be more difficult to remove via PAC adsorption and ozonation than their parent pesticides. However, the TPs that were difficult to remove via PAC adsorption did not induce strong mutagenicity after chlorination, and the TPs that were associated with strong mutagenicity after chlorination could be removed via PAC adsorption. Therefore, PAC adsorption is hypothesized to be an effective method of treating drinking water to reduce the possibility of post-chlorination mutagenicity associated with both TPs and their parent pesticides. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112785
Appears in Collections: 气候减缓与适应
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作者单位: Faculty of Engineering Hokkaido University, N13W8, Sapporo, 060-8628, Japan; Graduate School of Engineering, Hokkaido University, N13W8, Sapporo, 060-8628, Japan; Faculty of Science and Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima, 890-0065, Japan; Faculty of Environment and Information Sciences, Yokohama National University, 79-7 Tokiwadai, Hodogaya, Yokohama, 240-8501, Japan
Recommended Citation:
Matsushita T.,Morimoto A.,Kuriyama T.,et al. Removals of pesticides and pesticide transformation products during drinking water treatment processes and their impact on mutagen formation potential after chlorination[J]. Water Research,2018-01-01,138