DOI: 10.1016/j.watres.2018.04.044
Scopus记录号: 2-s2.0-85047441550
论文题名: Autocatalytic degradation of perfluorooctanoic acid in a permanganate-ultrasonic system
作者: Hu Y.-B. ; Lo S.-L. ; Li Y.-F. ; Lee Y.-C. ; Chen M.-J. ; Lin J.-C.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 140 起始页码: 148
结束页码: 157
语种: 英语
英文关键词: Autocatalysis
; Perfluorooctanoic acid
; Permanganate
; Ultrasonic irradiation
Scopus关键词: Copper compounds
; Degradation
; Manganese oxide
; Rate constants
; Solutions
; Autocatalysis
; Autocatalytic degradation
; Increasing solutions
; Neutral conditions
; Perfluorooctanoic acid
; Permanganate
; Pseudo first order rate constants
; Ultrasound irradiation
; Iron compounds
; argon
; cupric ion
; ferrous ion
; manganese oxide
; perfluorooctanoic acid
; permanganate potassium
; copper
; fluorocarbon
; iron
; manganese derivative
; octanoic acid derivative
; oxide
; perfluorooctanoic acid
; permanganic acid
; aqueous solution
; catalysis
; complexation
; decomposition
; degradation
; organic acid
; reaction rate
; temperature
; ultrasonics
; acidity
; aqueous solution
; Article
; catalysis
; comparative study
; complex formation
; decomposition
; defluorination
; degradation
; electron transport
; first order rate constant
; hydrophobicity
; particle size
; permanganate ultrasonic system
; pH
; priority journal
; solubility
; temperature
; ultrasound
; waste water management
; chemistry
; procedures
; sewage
; solution and solubility
; ultrasound
; water pollutant
; Argon
; Caprylates
; Copper
; Fluorocarbons
; Hydrogen-Ion Concentration
; Iron
; Manganese Compounds
; Oxides
; Solutions
; Ultrasonics
; Waste Disposal, Fluid
; Water Pollutants, Chemical
英文摘要: An autocatalytic system, permanganate-ultrasonic (PM-US) system, was applied to degrade perfluorooctanoic acid (PFOA) in aqueous solutions. After a 120-min ultrasonication, a PM dosage of 6 mM increased the pseudo first-order rate constant (k1) for PFOA decomposition from 3.5 × 10−3 to 13.0 × 10−3 min−1 and increased the pseudo zeroth-order rate constant (k2) for PFOA defluorination from 1.5 × 10−3 to 7.9 × 10−3 mM·min−1, respectively. The PFOA degradation rates increased proportionally with the enhanced production rates of MnO2 particles. An initial pH 4 condition was optimal for the PFOA degradation compared to highly acidic and neutral conditions. PFOA degradation could be significantly facilitated by increasing power density of ultrasonication from 60 to 180 W·L−1. While increasing solution temperature to 50 °C only slightly promoted the PFOA decomposition and defluorination to 1.15 and 1.07 times of that at 30 °C, respectively. The solution saturated with argon was more favorable for the PFOA degradation in the PM-US system than that saturated with air and oxygen. Co-dissolved Cu(II), Fe(II) and Fe(III) ions inhibited the PFOA degradation by forming metal-PFOA complexes. Based on the experimental results and intermediates analysis, mechanisms and pathways of PFOA decomposition and defluorination in the PM-US system were proposed. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112711
Appears in Collections: 气候减缓与适应
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作者单位: Graduate Institute of Environmental Engineering, National Taiwan University, 71 Chou-Shan Rd., Taipei, 106, Taiwan
Recommended Citation:
Hu Y.-B.,Lo S.-L.,Li Y.-F.,et al. Autocatalytic degradation of perfluorooctanoic acid in a permanganate-ultrasonic system[J]. Water Research,2018-01-01,140