DOI: 10.1016/j.watres.2018.01.039
Scopus记录号: 2-s2.0-85041394864
论文题名: Organic contaminants degradation from the S(IV) autoxidation process catalyzed by ferrous-manganous ions: A noticeable Mn(III) oxidation process
作者: Zhang J. ; Ma J. ; Song H. ; Sun S. ; Zhang Z. ; Yang T.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 133 起始页码: 227
结束页码: 235
语种: 英语
英文关键词: Acetylation degradation pathway
; Atrazine
; Fe2+-Mn2+ catalysis process
; Mn(III) oxidation
; Sulfur radicals
Scopus关键词: Acetylation
; Catalysis
; Contamination
; Dissolved oxygen
; Electron spin resonance spectroscopy
; Herbicides
; Iron compounds
; Magnetic moments
; Oxidation
; Sulfur compounds
; Atrazine degradation
; Catalysis process
; Competitive dynamics
; Degradation pathways
; Environmental factors
; pH buffering capacity
; Rate determining step
; Sulfur radicals
; Manganese compounds
; bicarbonate
; dissolved oxygen
; ferrous ion
; hydroxyl radical
; manganese
; phosphate
; sulfate
; sulfur
; atrazine
; iron
; manganese
; sulfite
; atrazine
; catalysis
; degradation
; experimental study
; hydrolysis
; ion
; manganese
; organic pollutant
; oxidation
; pollutant removal
; radical
; sulfur
; acetylation
; Article
; autooxidation
; catalysis
; controlled study
; degradation
; environmental factor
; hydrolysis
; pH
; priority journal
; catalysis
; chemistry
; electron spin resonance
; oxidation reduction reaction
; Atrazine
; Catalysis
; Electron Spin Resonance Spectroscopy
; Iron
; Manganese
; Oxidation-Reduction
; Sulfites
英文摘要: Remarkable atrazine degradation in the S(IV) autoxidation process catalyzed by Fe2+-Mn2+ (Fe2+/Mn2+/sulfite) was demonstrated in this study. Competitive kinetic experiments, alcohol inhibiting methods and electron spin resonance (ESR) experiments proved that sulfur radicals were not the major oxidation species. Mn(III) was demonstrated to be the primary active species in the Fe2+/Mn2+/sulfite process based on the comparison of oxidation selectivity. Moreover, the inhibiting effect of the Mn(III) hydrolysis and the S(IV) autoxidation in the presence of organic contaminants indicated the existence of three Mn(III) consumption routes in the Fe2+/Mn2+/sulfite process. The absence of hydroxyl radical and sulfate radical was interpreted by the competitive dynamics method. The oxidation capacity of the Fe2+/Mn2+/sulfite was independent of the initial pH (4.0–6.0) because the fast decay of S(IV) decreased initial pH below 4.0 rapidly. The rate of ATZ degradation was independent of the dissolved oxygen (DO) because that the major DO consumption process was not the rate determining step during the production of SO5 •-. Phosphate and bicarbonate were confirmed to have greater inhibitory effects than other environmental factors because of their strong pH buffering capacity and complexing capacity for Fe3+. The proposed acetylation degradation pathway of ATZ showed the application of the Fe2+/Mn2+/sulfite process in the research of contaminants degradation pathways. This work investigated the characteristics of the Fe2+/Mn2+/sulfite process in the presence of organic contaminants, which might promote the development of Mn(III) oxidation technology. © 2018 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112940
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, Harbin Institute of Technology, Harbin, 150090, China
Recommended Citation:
Zhang J.,Ma J.,Song H.,et al. Organic contaminants degradation from the S(IV) autoxidation process catalyzed by ferrous-manganous ions: A noticeable Mn(III) oxidation process[J]. Water Research,2018-01-01,133