DOI: 10.1016/j.watres.2018.02.014
Scopus记录号: 2-s2.0-85042196001
论文题名: Transformation of Methylparaben by aqueous permanganate in the presence of iodide: Kinetics, modeling, and formation of iodinated aromatic products
作者: Li J. ; Jiang J. ; Pang S.-Y. ; Zhou Y. ; Gao Y. ; Yang Y. ; Sun S. ; Liu G. ; Ma J. ; Jiang C. ; Wang L.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 135 起始页码: 75
结束页码: 84
语种: 英语
英文关键词: Iodide (I−)
; Iodinated aromatic products
; MethylParaben (MeP)
; Permanganate
; Phenolic compounds
Scopus关键词: Aromatization
; Kinetics
; Liquid chromatography
; Mass spectrometry
; Methylparaben
; pH effects
; Phenols
; Potash
; Rate constants
; Implications for futures
; Iodinated aromatic products
; Liquid chromatography-tandem mass spectrometry
; Permanganate
; Phenolic compounds
; Potassium permanganate
; Second-order rate constants
; Transformation kinetics
; Manganese compounds
; aromatic compound
; iodide
; methyl paraben
; permanganate potassium
; phenol derivative
; 4 hydroxybenzoic acid ester
; 4,4' isopropylidenediphenol
; 4-nonylphenol
; benzhydryl derivative
; hypoiodous acid
; iodide
; iodine derivative
; methyl paraben
; permanganate potassium
; triclosan
; Article
; chemical reaction kinetics
; concentration (parameters)
; controlled study
; iodination
; liquid chromatography-mass spectrometry
; pH
; priority journal
; rate constant
; chemical model
; chemistry
; halogenation
; kinetics
; procedures
; water management
; water pollutant
; Benzhydryl Compounds
; Halogenation
; Hydrogen-Ion Concentration
; Iodides
; Iodine Compounds
; Kinetics
; Models, Chemical
; Parabens
; Phenols
; Potassium Permanganate
; Triclosan
; Water Pollutants, Chemical
; Water Purification
英文摘要: This work investigated impacts of iodide (I−) on the transformation of the widely used phenolic preservative methylparaben (MeP) as well as 11 other phenolic compounds by potassium permanganate (KMnO4). It was found that KMnO4 showed a low reactivity towards MeP in the absence of I− with apparent second-order rate constants (kapp) ranging from 0.065 ± 0.0071 to 1.0 ± 0.1 M−1s−1 over the pH range of 5–9. The presence of I− remarkably enhanced the transformation rates of MeP by KMnO4 via the contribution of hypoiodous acid (HOI) in situ formed, which displayed several orders of magnitude higher reactivity towards MeP than KMnO4. This enhancing effect of I− was greatly influenced by solution conditions (e.g., I− or KMnO4 concentration or pH), which could be well simulated by a kinetic model involving competition reactions (i.e., KMnO4 with I−, KMnO4 with MeP, HOI with KMnO4, and HOI with MeP). Similar enhancing effect of I− on the transformation kinetics of 5 other selected phenols (i.e., p-hydroxybenzoic acid, phenol, and bromophenols) at pH 7 was also observed, but not in the cases of bisphenol A, triclosan, 4-n-nonylphenol, and cresols. This discrepancy could be well explained by the relative reactivity of KMnO4 towards phenols vs I−. Liquid chromatography-tandem mass spectrometry analysis showed that iodinated aromatic products and/or iodinated quinone-like product were generated in the cases where I− enhancing effect was observed. Evolution of iodinated aromatic products generated from MeP (10 μM) treated by KMnO4 (50-150 μM) in the presence of I− (5-15 μM) suggested that higher I− or moderate KMnO4 concentration or neutral pH promoted their formation. A similar enhancing effect of I− (1 μM) on the transformation of MeP (1 μM) by KMnO4 (12.6 μM) and formation of iodinated aromatic products were also observed in natural water. This work demonstrates an important role of I− in the transformation kinetics and product formation of phenolic compounds by KMnO4, which has great implications for future applications of KMnO4 in treatment of I−-containing water. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112875
Appears in Collections: 气候减缓与适应
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作者单位: State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China; School of Municipal and Environmental Engineering, Jilin Jianzhu University, Changchun, 130118, China; School of Civil and Environmental Engineering, Shenzhen Polytechnic, Shenzhen, 518055, China
Recommended Citation:
Li J.,Jiang J.,Pang S.-Y.,et al. Transformation of Methylparaben by aqueous permanganate in the presence of iodide: Kinetics, modeling, and formation of iodinated aromatic products[J]. Water Research,2018-01-01,135