DOI: 10.1016/j.watres.2018.06.002
Scopus记录号: 2-s2.0-85049330534
论文题名: New insight into the mechanism of peroxymonosulfate activation by sulfur-containing minerals: Role of sulfur conversion in sulfate radical generation
作者: Zhou Y. ; Wang X. ; Zhu C. ; Dionysiou D.D. ; Zhao G. ; Fang G. ; Zhou D.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 142 起始页码: 208
结束页码: 216
语种: 英语
英文关键词: Activation
; Peroxymonosulfate
; Pyrite
; Sulfate radicals
; Sulfur conversion
Scopus关键词: Fourier transform infrared spectroscopy
; Organic carbon
; Paramagnetic resonance
; Pyrites
; Reaction intermediates
; Sulfate minerals
; X ray photoelectron spectroscopy
; Attenuated total reflectance Fourier transform infrared spectroscopy
; Oxidation of sulfides
; Peroxymonosulfate
; Peroxymonosulfate activations
; Persulfate activations
; Radical chain reactions
; Sulfate radicals
; Total organic carbon removal
; Chemical activation
; mineral
; phthalic acid diethyl ester
; pyrite
; sulfate
; sulfur
; activation energy
; electron spin resonance
; iron
; mineralization
; pollutant removal
; pyrite
; radical
; sulfate
; sulfur
; total organic carbon
; transformation
; Article
; controlled study
; degradation
; electron spin resonance
; Fourier transform infrared spectroscopy
; mineralization
; oxidation
; photoelectron spectroscopy
; priority journal
; surface property
英文摘要: Peroxymonosulfate (PMS) or persulfate activation by sulfur-containing minerals has been applied extensively for the degradation of contaminants; however, the role of sulfur conversion in this process has not been fully explored. In this study, pyrite (FeS2)-based PMS activation process was developed for diethyl phthalate (DEP) degradation, and its underlying mechanisms were elucidated. PMS was found to be efficiently activated by FeS2 for DEP degradation and mineralization, achieving 58.9% total organic carbon removal using 0.5 g/L FeS2 and 2.0 mM PMS. Sulfides were the dominant electron donor for PMS activation, and mediated Fe(II) regeneration to activate PMS on the surface of FeS2 particles. Meanwhile, different sulfur conversion intermediates, such as S5 2−, S8 0, S2O3 2−, and SO3 2−, were formed from the oxidation of sulfides by Fe(III) and PMS, and determined by X-ray photoelectron spectroscopy and in-situ attenuated total reflectance Fourier transform infrared spectroscopy analysis. SO3 2− was the dominant sulfur species responsible for sulfate radicals (SO4 [rad]−) generation by activating PMS directly or activating Fe(III) to initiate a radical chain reaction, which was supported by the electron paramagnetic resonance results. This study highlights the important role of sulfur conversion in PMS activation by pyrite and provides new insights into the mechanism of oxidant activation by sulfur-containing minerals. © 2018 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112650
Appears in Collections: 气候减缓与适应
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作者单位: Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; College of Environmental Science and Engineering, Anhui Normal University, Wuhu, 241000, China; Environmental Engineering and Science Program, Department of Chemical and Environmental Engineering (ChEE), University of Cincinnati, Cincinnati, OH 45221-0012, United States
Recommended Citation:
Zhou Y.,Wang X.,Zhu C.,et al. New insight into the mechanism of peroxymonosulfate activation by sulfur-containing minerals: Role of sulfur conversion in sulfate radical generation[J]. Water Research,2018-01-01,142