Journal ArticleDOI
Activation of Peroxymonosulfate by Benzoquinone: A Novel Nonradical Oxidation Process
TLDR
Findings have important implications for the development of novel nonradical oxidation processes based on PMS, because 1O2 as a moderately reactive electrophile may suffer less interference from background organic matters compared with nonselective •OH and SO4•-.Abstract:
The reactions between peroxymonosulfate (PMS) and quinones were investigated for the first time in this work, where benzoquinone (BQ) was selected as a model quinone. It was demonstrated that BQ could efficiently activate PMS for the degradation of sulfamethoxazole (SMX; a frequently detected antibiotic in the environments), and the degradation rate increased with solution pH from 7 to 10. Interestingly, quenching studies suggested that neither hydroxyl radical (•OH) nor sulfate radical (SO4•–) was produced therein. Instead, the generation of singlet oxygen (1O2) was proved by using two chemical probes (i.e., 2,2,6,6-tetramethyl-4-piperidinol and 9,10-diphenylanthracene) with the appearance of 1O2 indicative products detected by electron paramagnetic resonance spectrometry and liquid chromatography mass spectrometry, respectively. A catalytic mechanism was proposed involving the formation of a dioxirane intermediate between PMS and BQ and the subsequent decomposition of this intermediate into 1O2. Accordi...read more
Citations
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Journal ArticleDOI
Singlet oxygen-dominated non-radical oxidation in biochar/peroxymonosulfate system for efficient degradation of tetracycline hydrochloride: Surface site and catalytic mechanism
Journal ArticleDOI
Confined Tri-Functional FeOx @MnO2 @SiO2 Flask Micromotors for Long-Lasting Motion and Catalytic Reactions.
Yangyang Yang,Jing-Wun Lin,Panpan Zhang,Kunsheng Hu,Shuang Meng,Peng Zhou,Xiaoguang Duan,Hongqi Sun,Shaobin Wang +8 more
TL;DR: In this paper , a magnetic FeOx nanoellipsoid with multi-functions was designed and demonstrated its catalytic performance in H2 O2 /peroxymonosulfate (PMS) activation for simultaneously sustained motion and organic degradation.
Journal ArticleDOI
Multiple path-dominated activation of peroxymonosulfate by MOF-derived Fe2O3/Mn3O4 for catalytic degradation of tetracycline
TL;DR: In this paper , a metal organic framework (MOF) derived Fe2O3/Mn3O4 composite was used for peroxymonosulfate (PMS) activator, and the physicochemical properties, catalytic performance, and degradation mechanism of tetracycline (TC) by the reaction system were thoroughly investigated.
Book ChapterDOI
Novel Strategy for Soil Remediation of Contaminated Sites Using Persulfate-based Advanced Oxidation Technologies
TL;DR: In this article , the authors summarized some characteristics of the soil affecting pollutant degradation and the persulfate activation method suitable for soil remediation under different conditions, and attempts to combine a variety of methods to better repair contaminated soil.
Journal ArticleDOI
Review of characteristics, generation pathways and detection methods of singlet oxygen generated in advanced oxidation processes (AOPs)
ZhiZhong Xie,Chuanshu He,Dan-Ni Pei,Yu-Xiang Dong,Shuai Yang,Zhaokun Xiong,Peng Zhou,Zhicheng Pan,Gang Yao,Bo Lai +9 more
TL;DR: In this paper , the authors comprehensively summarized the characteristics, detection methods, and generation pathways of 1O2 based on the latest research, including its molecular structure, orbital energy, lifetime in solvents, reaction characteristics and reaction pathways.
References
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Journal Article
Critical review of rate condtants for reaction of hydrated electrons, hydrogen atoms and hydroxyl radicals in aqueous solution
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Rate Constants for Reactions of Inorganic Radicals in Aqueous Solution
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Radical generation by the interaction of transition metals with common oxidants.
TL;DR: Nine transition metals were tested for the activation of three oxidants and the generation of inorganic radical species such as sulfate, peroxymonosulfate, and hydroxyl radicals to postulate the rate-determining step of the redox reactions taking place when a metal is coupled with an oxidant in aqueous solution.
Journal ArticleDOI
Degradation of organic contaminants in water with sulfate radicals generated by the conjunction of peroxymonosulfate with cobalt.
TL;DR: The advantage of Co/PMS compared to the traditional Fenton Reagent is attributed primarily to the oxidizing strength of the radicals formed, since sulfate radicals are stronger oxidants than hydroxyl and the thermodynamics of the transition-metal-oxidant coupling.
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