DOI: 10.1016/j.watres.2018.01.065
Scopus记录号: 2-s2.0-85041519077
论文题名: Degradation of organic compounds during the corrosion of ZVI by hydrogen peroxide at neutral pH: Kinetics, mechanisms and effect of corrosion promoting and inhibiting ions
作者: Ling R. ; Chen J.P. ; Shao J. ; Reinhard M.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 134 起始页码: 44
结束页码: 53
语种: 英语
英文关键词: Corrosion
; Fenton reaction
; Hydrogen peroxide
; Hydroxyl radical
; Zero valent iron
Scopus关键词: Chelation
; Chlorine compounds
; Corrosion
; Degradation
; Hydrogen peroxide
; Kinetics
; Organic compounds
; Oxidation
; Peroxides
; Cathodic reductions
; Degradation of organic compounds
; Fenton reactions
; Hydroxyl radicals
; Pseudo-first-order
; Radical oxygen species
; Reactive surface area
; Zero-valent iron
; Iron compounds
; acesulfame
; buffer
; chloride ion
; ferrous ion
; hydrogen peroxide
; hydroxyl group
; iron
; iron chelating agent
; organic compound
; phosphate
; reactive oxygen metabolite
; unclassified drug
; water
; zero valent iron
; acetosulfame
; hydrogen peroxide
; iron
; thiazine derivative
; corrosion
; degradation
; hydrogen peroxide
; hydroxyl radical
; inhibition
; iron nanoparticle
; kinetics
; organic compound
; oxidation
; pH
; reactive oxygen species
; agricultural slurry
; aquatic environment
; Article
; bioremediation
; chemical reaction kinetics
; controlled study
; corrosion
; decomposition
; Fenton reaction
; isotherm
; kinetics
; laboratory
; Langmuir kinetics
; low temperature
; oxidation
; pH
; powder
; priority journal
; stoichiometry
; surface area
; chemistry
; corrosion
; pH
; water pollutant
; Corrosion
; Hydrogen Peroxide
; Hydrogen-Ion Concentration
; Iron
; Kinetics
; Thiazines
; Water Pollutants, Chemical
英文摘要: The corrosion of zero valent iron (ZVI) by hydrogen peroxide (H2O2) generates hydroxyl (⋅OH) and other radical oxygen species (ROS) that degrade organic materials. To better understand the factors that govern the ROS formation during the H2O2-induced corrosion, we investigated the degradation of an organic probe compound (acesulfame (ACE)) in slurries of ZVI powder in unbuffered laboratory water at pH 6.5 ± 0.5. Chloride ions accelerated the corrosion of ZVI by H2O2 and the formation ROS and, therefore, the degradation of organic materials. Conversely, slowing corrosion by phosphate buffer inhibited ROS formation and the degradation of organic compounds. The rate of H2O2 decomposition was correlated with the liberation of Fe2+(aq) and the ACE degradation rate. The kinetics of H2O2 decomposition was pseudo-first-order and zero-order at low (<0.04 mM/mg) and high [H2O2]/[ZVI] initial ratios, respectively, and was consistent with Langmuir kinetics. The H2O2 decomposition rate was proportional to the ZVI reactive surface area (SA) and nearly independent of the extent of ZVI oxidation, the presence of a Fe2+(aq) chelating agent, and ⋅OH quenchers (methanol and tert-butanol). Kinetic data suggest a mechanism involving rapid cathodic reduction of H2O2 at the metallic ZVI surface which causes the liberation of Fe2+(aq) that generate ⋅OH via the homogeneous Fenton reaction. The stoichiometric efficiency (SE) of organics degradation ranged from 0.0008% to 0.014% and increased with decreasing H2O2 decomposition rate. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112900
Appears in Collections: 气候减缓与适应
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作者单位: Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, E1A 07-03, Singapore, 117576, Singapore; School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China; Department of Civil and Environmental Engineering, Stanford University, Stanford, CA 94305, United States
Recommended Citation:
Ling R.,Chen J.P.,Shao J.,et al. Degradation of organic compounds during the corrosion of ZVI by hydrogen peroxide at neutral pH: Kinetics, mechanisms and effect of corrosion promoting and inhibiting ions[J]. Water Research,2018-01-01,134