DOI: 10.1016/j.watres.2018.08.055
Scopus记录号: 2-s2.0-85053052105
论文题名: Deciphering the degradation/chlorination mechanisms of maleic acid in the Fe(II)/peroxymonosulfate process: An often overlooked effect of chloride
作者: Huang Y. ; Sheng B. ; Wang Z. ; Liu Q. ; Yuan R. ; Xiao D. ; Liu J.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 145 起始页码: 453
结束页码: 463
语种: 英语
英文关键词: Advanced oxidation processes
; Chloride
; Chlorinated by-products
; Kinetic modeling
; Sulfate radical
Scopus关键词: Aromatic compounds
; Aromatization
; Carboxylation
; Chlorine compounds
; Degradation
; Industrial water treatment
; Isomerization
; Kinetic theory
; Kinetics
; Mineralogy
; Oxidation
; Reaction intermediates
; Sulfur compounds
; Wastewater treatment
; Adsorbable organic halogens
; Advanced Oxidation Processes
; Chloride
; Cis-trans Isomerization
; Kinetic modeling
; Saline wastewater treatment
; Short-chain carboxylic acids
; Sulfate radicals
; Iron compounds
; byproduct
; carboxylic acid
; chloride
; chlorination
; decomposition
; degradation
; halogen
; iron
; mineralization
; modeling
; organic acid
; organic pollutant
; oxidation
; radical
; sulfate
英文摘要: In recent years, a significant effort has been devoted into investigating the effects of chloride on the degradation kinetics of aromatic pollutants. The impact of chloride on the decomposition of short-chain carboxylic acid intermediates from aromatics degradation has often been overlooked. In this study the roles of chloride in the oxidation of maleic acid (MA) in the Fe(II)/peroxymonosulfate (PMS) process was investigated. Degradation efficiency, reaction intermediates, adsorbable organic halogen (AOX) accumulation and mineralization were examined. The chloride ion (Cl−) was found to have an overall negative impact on MA degradation and mineralization in the Fe(II)/PMS system. The presence of Cl− led to the formation of chlorinated by-products and a high production of AOX. The mineralization of MA was decreased with increasing Cl− concentrations. Kinetic modeling demonstrated the impact of various radicals largely depended on the concentration of Cl−. The significance of Cl2 •- or Cl2 for MA destruction was enhanced with increasing Cl− content, and overwhelmed that of SO4 •- when the Cl− concentration was over 5 mM. In the absence of Cl−, SO4 •- was the primary radical responsible for MA oxidation. A possible degradation pathway is proposed (cis-trans isomerization, decarboxylation and halogenations processes). These results may help to understand the full oxidation pathways of refractory aromatic compounds and the mechanism of chlorinated by-products formation in industrial saline wastewater treatment. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112446
Appears in Collections: 气候减缓与适应
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作者单位: State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China; School of Ecological and Environmental Science, East China Normal University, Shanghai, 200241, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China; College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing, 163318, China; East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai, 201620, China
Recommended Citation:
Huang Y.,Sheng B.,Wang Z.,et al. Deciphering the degradation/chlorination mechanisms of maleic acid in the Fe(II)/peroxymonosulfate process: An often overlooked effect of chloride[J]. Water Research,2018-01-01,145