DOI: 10.1016/j.watres.2018.06.060
Scopus记录号: 2-s2.0-85049773756
论文题名: Two analytical approaches quantifying the electron donating capacities of dissolved organic matter to monitor its oxidation during chlorination and ozonation
作者: Önnby L. ; Walpen N. ; Salhi E. ; Sander M. ; von Gunten U.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 144 起始页码: 677
结束页码: 689
语种: 英语
英文关键词: Chlorination
; Dissolved organic matter
; Electron donating capacity
; Flow-injection analysis
; Ozonation
; Size exclusion chromatography
Scopus关键词: Aromatization
; Biogeochemistry
; Biological materials
; Chemical detection
; Chlorination
; Chlorine
; Column chromatography
; Dissolution
; Electrons
; Oxidants
; Ozone
; Ozone water treatment
; Ozonization
; Phenols
; Reduction
; Comparative studies
; Dissolved organic matters
; ELectrochemical detection
; Electron-donating
; Flow injection analysis
; Measurable parameters
; Number of electrons
; Water treatment facilities
; Size exclusion chromatography
; chlorine
; dissolved organic matter
; oxidizing agent
; ozone
; phenol derivative
; chemical reaction
; chlorination
; chromatography
; comparative study
; dissolved organic matter
; electrochemical method
; electron
; Oceania Ecozone
; oxidant
; oxidation
; ozonation
; phenol
; water treatment
; Article
; chlorination
; electron
; electron transport
; oxidation
; oxidation reduction state
; ozonation
; pH
; priority journal
; room temperature
; size exclusion chromatography
; water analysis
; water treatment
英文摘要: Electron-donating activated aromatic moieties, including phenols, in dissolved organic matter (DOM) partially control its reactivity with the chemical oxidants ozone and chlorine. This comparative study introduces two sensitive analytical systems to directly and selectively quantify the electron-donating capacity (EDC) of DOM, which corresponds to the number of electrons transferred from activated aromatic moieties, including phenols, to the added chemical oxidant 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulphonate) radical cation (i.e., ABTS•+). The first system separates DOM by size exclusion chromatography (SEC) followed by a post-column reaction with ABTS•+ and a spectrophotometric quantification of the reduction of ABTS•+ by DOM. The second system employs flow-injection analysis (FIA) coupled to electrochemical detection to quantify ABTS•+ reduction by DOM. Both systems have very low limits of quantification, allowing determination of EDC values of dilute DOM samples with <1 mg carbon per liter. When applied to ozonated and chlorinated model DOM isolates and real water samples, the two analytical systems showed that EDC values of the treated DOM decrease with increasing specific oxidant doses. The EDC decreases detected by the two systems were in overall good agreement except for one sample containing DOM with a very low EDC. The combination of EDC with UV-absorbance measurements gives further insights into the chemical reaction pathways of DOM with chemical oxidants such as ozone or chlorine. We propose the use of EDC in water treatment facilities as a readily measurable parameter to determine the content of electron-donating aromatic moieties in DOM and thereby its reactivity with added chemical oxidants. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112510
Appears in Collections: 气候减缓与适应
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作者单位: Swiss Federal Institute of Aquatic Science and Technology (Eawag), Dübendorf, 8600, Switzerland; Institute of Biogeochemistry and Pollutant Dynamics, Swiss Federal Institute of Technology (ETH) Zurich, Zurich, 8092, Switzerland; School of Architecture, Civil & Environmental Engineering (ENAC), Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, 1015, Switzerland
Recommended Citation:
Önnby L.,Walpen N.,Salhi E.,et al. Two analytical approaches quantifying the electron donating capacities of dissolved organic matter to monitor its oxidation during chlorination and ozonation[J]. Water Research,2018-01-01,144