DOI: 10.1016/j.watres.2018.06.059
Scopus记录号: 2-s2.0-85049794061
论文题名: Ozone and chlorine reactions with dissolved organic matter - Assessment of oxidant-reactive moieties by optical measurements and the electron donating capacities
作者: Önnby L. ; Salhi E. ; McKay G. ; Rosario-Ortiz F.L. ; von Gunten U.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 144 起始页码: 64
结束页码: 75
语种: 英语
英文关键词: Chlorine
; Disinfection by-products
; Dissolved organic matter
; Electron donating capacity
; Fluorescence
; Oxidant reactivity
; Ozone
Scopus关键词: Biogeochemistry
; Chlorine
; Chlorine compounds
; Dissolution
; Electrons
; Fluorescence
; Fluorophores
; Optical data processing
; Optical variables measurement
; Organic acids
; Oxidants
; Ozone
; Ozonization
; Reservoirs (water)
; Disinfection by-product
; Dissolved organic matters
; Electron-donating
; Fluorescence quantum yield
; Optical measurement
; Oxidation process
; Relative absorbance
; Suwannee River fulvic acid
; Biological materials
; acetic acid
; benzoquinone
; chlorine
; chloroform
; dissolved organic matter
; fulvic acid
; natural organic matter
; oxidizing agent
; ozone
; phenol derivative
; absorbance
; byproduct
; chemical property
; chlorination
; chlorine
; chloroform
; disinfection
; dissolved organic matter
; electron
; fulvic acid
; optical instrument
; oxidant
; oxidation
; ozone
; transformation
; absorption
; Article
; chemical reaction
; chlorination
; comparative study
; controlled study
; electron
; fluorescence
; lake
; optics
; oxidation
; ozonation
; ozone depletion
; pH
; priority journal
; quantum yield
; river
; ultraviolet radiation
; waste water management
; Antarctica
; East Antarctica
; Pony Lake
; Ross Island
; Suwannee River
; United States
英文摘要: Oxidation processes are impacted by the type, concentration and reactivity of the dissolved organic matter (DOM). In this study, the reactions between various types of DOM (Suwannee River fulvic acid (SRFA), Nordic Reservoir NOM (NNOM) and Pony Lake fulvic acid (PLFA)) and two oxidants (ozone and chlorine) were studied in the pH range 2–9 by using a combination of optical measurements and electron donating capacities. The relationships between residual electron donating capacity (EDC) and residual absorbance showed a strong pH dependence for the ozone-DOM reactions with phenolic functional groups being the main reacting moieties. Relative EDC and absorbance abatements (UV254 or UV280) were similar at pH 2. At pH 7 or 9, the relative abatement of EDC was more pronounced than for absorbance, which could be explained by the formation of UV-absorbing products such as benzoquinone from the transformation of phenolic moieties. An increase in fluorescence abatement with increasing pH was also observed during ozonation. The increase in fluorescence quantum yields could not be attributed to formation of benzoquinone, but related to a faster abatement of phenolic moieties relative to fluorophores with low ozone reactivity. The overall •OH yields as a result of DOM-induced ozone consumption increased significantly with increasing pH, which could be related to the higher reactivity of phenolic moieties at higher pH. The •OH yields for SRFA and PLFA were proportional to the phenolic contents, whereas for NNOM, the •OH yield was about 30% higher. During chlorination of DOM at pH 7 an efficient relative EDC abatement was observed whereas the relative absorbance abatement was much less pronounced. This is due to the formation of chlorophenolic moieties, which exert a significant absorbance, and partly lose their electron donating capacity. Pre-ozonation of SRFA leads to a decrease of chloroform and haloacetic acid formation, however, only after a threshold of > ∼50% abatement of the EDC and under conditions which are not precursor limited. The decrease in chloroform and haloacetic acid formation after the threshold EDC abatement was proportional to the relative residual EDC. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112489
Appears in Collections: 气候减缓与适应
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作者单位: Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, 8600, Switzerland; Department of Civil, Environmental and Architectural Engineering, Environmental Engineering Program, University of Colorado, Boulder, CO 80309, United States; Institute of Biogeochemistry and Pollutant Dynamics, Swiss Federal Institute of Technology (ETH) Zürich, Zürich, 8092, Switzerland; School of Architecture, Civil & Environmental Engineering (ENAC), Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, 1015, Switzerland
Recommended Citation:
Önnby L.,Salhi E.,McKay G.,et al. Ozone and chlorine reactions with dissolved organic matter - Assessment of oxidant-reactive moieties by optical measurements and the electron donating capacities[J]. Water Research,2018-01-01,144