DOI: 10.1016/j.watres.2017.12.003
Scopus记录号: 2-s2.0-85037334397
论文题名: Oxidation of iopamidol with ferrate (Fe(VI)): Kinetics and formation of toxic iodinated disinfection by-products
作者: Dong H. ; Qiang Z. ; Liu S. ; Li J. ; Yu J. ; Qu J.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 130 起始页码: 200
结束页码: 207
语种: 英语
英文关键词: Ferrate
; Iodinated disinfection by-products
; Iopamidol
; Kinetics
Scopus关键词: Biological sewage treatment
; Contrast media
; Disinfection
; Enzyme kinetics
; Kinetics
; Molecular orbitals
; Oxidation
; Rate constants
; Amide hydrolysis
; Ferrate
; Iodinated disinfection by-products
; Iodinated X-ray contrast media
; Iopamidol
; Molecular orbital energy
; Second-order rate constants
; Transformation pathways
; Iron compounds
; amide
; amine
; diatrizoate
; disinfection by product
; drug metabolite
; ferrate
; iodinated contrast medium
; iodoacetic acid
; iodoform
; iohexol
; iopamidol
; iopromide
; oxidizing agent
; triiodoacetic acid
; unclassified drug
; water
; contrast medium
; ferrate ion
; iodine
; iopamidol
; iron
; oxidizing agent
; chemical compound
; chemical reaction
; disinfection
; experimental study
; oxidation
; reaction kinetics
; Article
; chemical reaction
; degradation kinetics
; deiodination
; density functional theory
; drug oxidation
; drug transformation
; hydrolysis
; oxidation kinetics
; pH
; priority journal
; rate constant
; tandem mass spectrometry
; time of flight mass spectrometry
; ultra performance liquid chromatography
; chemistry
; disinfection
; halogenation
; kinetics
; oxidation reduction reaction
; procedures
; water management
; water pollutant
; Contrast Media
; Disinfection
; Halogenation
; Iodine
; Iopamidol
; Iron
; Kinetics
; Oxidants
; Oxidation-Reduction
; Water Pollutants, Chemical
; Water Purification
英文摘要: Presence of iodinated X-ray contrast media (ICMs) in source water is of high concern, because of their potential to form highly toxic iodinated disinfection by-products (I-DBPs). This study investigated kinetics, mechanisms and products for oxidation of one ICMs, iopamidol (IPM) by ferrate (Fe(VI)). The obtained apparent second-order rate constants for oxidation of IPM by Fe(VI) ranged from 0.7 M−1 s−1 to 74.6 M−1 s−1 at pH 6.0–10.0, which were highly dependent on pH. It was found that the oxidation of IPM by Fe(VI) led to the formation of highly toxic I-DBPs. Iodoform (IF), iodoacetic acid and triiodoacetic acid formations were observed during the oxidation and IF dominated the formed I-DBPs. The formation of I-DBPs was also governed by pH and the maximum formation of I-DBPs occurred at pH 9.0. Transformation pathways of IPM by Fe(VI) oxidation were speculated to proceed through deiodination, amide hydrolysis and oxidation of amine reactions. The deiodination reaction during the oxidation of IPM by Fe(VI) contributed to the formation of I-DBPs. The formation of I-DBPs during the oxidation of IPM by Fe(VI) was significantly higher than those of iohexol, diatrizoate and iopromide, which was consistent with the lowest molecular orbital energy gap of IPM. Although Fe(VI) is considered as a green oxidant, the formation of highly toxic I-DBPs during the oxidation of IPM should receive great attention. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113048
Appears in Collections: 气候减缓与适应
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作者单位: Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 18 Shuang-qing Road, Beijing, 100085, China; Guangxi Colleges and Universities Key Laboratory of Food Safety and Pharmaceutical Analytical Chemistry, Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, School of Chemistry and Chemical Engineering, Guangxi University for Nationalities, 158 Da-xue Road, Nanning, Guangxi 530006, China; School of Environmental Science and Engineering, Qingdao University, 308 Ning-xia Road, Qingdao, 266071, China
Recommended Citation:
Dong H.,Qiang Z.,Liu S.,et al. Oxidation of iopamidol with ferrate (Fe(VI)): Kinetics and formation of toxic iodinated disinfection by-products[J]. Water Research,2018-01-01,130