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
More filters
Journal ArticleDOI
Photosensitive Dye as an Ideal Peroxymonosulfate Activator for Efficient Self-Degradation: A Novel Idea of Using Waste to Treat Waste
TL;DR: In this paper , a catalyst-free alizarin green (AG) self-activating peroxymonosulfate (PMS) catalytic system was constructed based on photosensitization properties of dye, which ultimately achieved efficient degradation of the dye activator, also the target pollutant.
Journal ArticleDOI
Peroxymonosulfate Activation by Oxygen Vacancies-Enriched Mxene Nano-Co3o4 Co-Catalyst for Efficient Degradation of 1,4-Dioxane: Efficiency, Mechanism, and Stability
Wei Li,Kuanchang He,Longxiang Tang,Qian Liu,Kui-bin Yang,Yidong Chen,Xin-Hong Zhao,Kai Wang,Hui Lin,Sihao Lv +9 more
Journal ArticleDOI
Efficient degradation of norfloxacin using a novel biochar-supported CuO/Fe3O4 combined with peroxydisulfate: Insights into enhanced contribution of nonradical pathway.
TL;DR: In this article , a biochar-supported bimetallic Fe3O4-CuO catalyst (CuFeBC) was developed to activate peroxodisulfate (PDS) for the degradation of norfloxacin (NOR) in aqueous solution.
Journal ArticleDOI
Surface-bound sulfate radical-dominated degradation of sulfamethoxazole in the CuFeAl-LDH/peroxymonosulfate system: The abundant hydroxyl groups enhancing efficiency mechanism
Qing Xin,Siqi Liu,Zhenyu Chen,P Han,Shu Xin,Qian Wang,Guocheng Liu,Cheng Zhi Zhou,Yanjun Xin,Qinghua Yan +9 more
TL;DR: In this article , a fast and efficient Cu2Fe0.5Al 0.5-LDH/PMS water purification system was constructed to degrade sulfamethoxazole (SMX).
Journal ArticleDOI
Application of KHSO5 for remediation of soils polluted by multi-chlorohydrocarbons: A comprehensive study on the treatment's efficacy, environmental implications, and phytotoxicity.
Belay Tafa Oba,Xuehao Zheng,Moses Akintayo Aborisade,A.K.Gautam Navneet Kumar,Ashenafi Yohannes Battamo,Jiashu Liu,Azhar Ali Laghari,Peizhe Sun,Yongkui Yang,Lin Zhao +9 more
TL;DR: In this paper , the potential of unactivated peroxymonosulfate (KHSO5) in remediating soil co-contaminated with trichlorophenol, para-dichlorobenzene, and para-chloro-meta-cresol was investigated.
References
More filters
Journal ArticleDOI
Critical Review of rate constants for reactions of hydrated electrons, hydrogen atoms and hydroxyl radicals (⋅OH/⋅O− in Aqueous Solution
TL;DR: In this article, the rate constants for over 3500 reaction are tabulated, including reaction with molecules, ions and other radicals derived from inorganic and organic solutes, and the corresponding radical anions, ⋅O− and eaq−, have been critically pulse radiolysis, flash photolysis and other methods.
Journal Article
Critical review of rate condtants for reaction of hydrated electrons, hydrogen atoms and hydroxyl radicals in aqueous solution
Journal ArticleDOI
Rate Constants for Reactions of Inorganic Radicals in Aqueous Solution
TL;DR: In this article, rate constants have been compiled for reactions of various inorganic radicals produced by radiolysis or photolysis, as well as by other chemical means in aqueous solutions.
Journal ArticleDOI
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.
Related Papers (5)
Radical generation by the interaction of transition metals with common oxidants.
Generation of sulfate radical through heterogeneous catalysis for organic contaminants removal: Current development, challenges and prospects
Application of peroxymonosulfate and its activation methods for degradation of environmental organic pollutants: Review
Farshid Ghanbari,Mahsa Moradi +1 more