DOI: 10.1016/j.watres.2018.08.065
Scopus记录号: 2-s2.0-85053041050
论文题名: A facile and green pretreatment method for nonionic total organic halogen (NTOX) analysis in water – Step I. Using electrodialysis to separate NTOX and halides
作者: Zhang Y. ; Bu Y. ; Han J. ; Liu Y. ; Chen B. ; Zhang X. ; Yang M. ; Sui Y.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 145 起始页码: 631
结束页码: 639
语种: 英语
英文关键词: AOX
; DBPs
; Disinfection byproducts
; Electrodialysis
; Total organic halogen
; TOX
Scopus关键词: Activated carbon
; Biological materials
; Byproducts
; Chlorine compounds
; Disinfection
; Electrodialysis
; Electrospray ionization
; Fluorine compounds
; Integrated circuits
; Ion chromatography
; Mass spectrometry
; Molecular weight
; Recovery
; Adsorbable organic halogens
; Chlorinated drinking waters
; DBPs
; Disinfection by-product
; Dissolved organic matters
; High molecular weight compounds
; Total organic halogens
; Triple-quadrupole mass spectrometry
; Potable water
; adsorption
; byproduct
; concentration (composition)
; detection method
; disinfection
; dissolved organic matter
; drinking water
; electrokinesis
; halogen
; numerical method
; ultraviolet B radiation
; ultraviolet radiation
; water treatment
英文摘要: Adsorbable organic halogen (AOX) is a bulk organic parameter conventionally used to indicate all adsorbable halogenated organic disinfection byproducts formed in disinfected water. Analytically, AOX is determined by three sequential steps: 1) concentration and separation of AOX from halides with activated carbon, 2) conversion of AOX into halides with pyrolysis, and 3) quantification of halides via microcoulometry or ion chromatography (IC). Because the approach is relatively costly and cannot effectively recover non-adsorbable compounds, we herein proposed a facile and green pretreatment tool to measure the nonionic portion of total organic halogen (NTOX) with a new three-step approach: 1) separation of NTOX and halides with electrodialysis (ED), 2) conversion of NTOX into halides with ultraviolet, and 3) analysis of halides with IC. To verify this proposal, this study presented the efficiency of ED in separating halides and NTOX under a variety of operational and environmental conditions. The results showed that ED removed ≥98.5% of fluoride, chloride, bromide, and iodide from all tested waters (up to 1000 mg-X/L) within 1.5 h. Meanwhile, ED recovered an average of 87.9% of fourteen small molecular weight model compounds with each at 100 μg/L. By using electrospray ionization-triple quadrupole mass spectrometry, the whole pictures of high molecular weight compounds in a chlorinated drinking water before and after ED pretreatment were compared, which revealed 79.7% and 83.6% recoveries of overall polar chlorinated and brominated compounds, respectively. In addition, the quantity and property of the dissolved organic matter were largely maintained by ED, and the retained organics may be used for later characterization. The study hence presents a novel use of ED as a pretreatment tool to enable subsequent NTOX measurement. © 2018 Elsevier Ltd
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112416
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Shenzhen Key Laboratory of Organic Pollution Prevention and Control, State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (Shenzhen), China; Department of Civil and Environmental Engineering, Hong Kong University of Science and Technology, Hong Kong; College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, China
Recommended Citation:
Zhang Y.,Bu Y.,Han J.,et al. A facile and green pretreatment method for nonionic total organic halogen (NTOX) analysis in water – Step I. Using electrodialysis to separate NTOX and halides[J]. Water Research,2018-01-01,145