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
Low-valent copper on molybdenum triggers molecular oxygen activation to selectively generate singlet oxygen for advanced oxidation processes.
TL;DR: In this paper , a facile molybdenum (Mo)/Cu2+ system was proposed to selectively generate 1O2 via O2 activation by using low-valence Cu0/Cu+ on its surface.
Journal ArticleDOI
Rapid and Efficient Degradation of Ceftiofur Sodium by 5,6-Dimethylbenzimidazole-Modified ZIF(Fe/Co)x@CNF Nanocomposites
TL;DR: In this paper , the authors used triethylamine and 5,6-dimethylbenzimidazole (DMBIM) to modify the ZIF(Fe/Co)1.25@CNF.
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Understanding the Assisting Role of PMS in Low Current Electrochemical Processes for Degradation of Antibiotics
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Efficient elimination of carbamazepine using polyacrylonitrile-supported pyridine bridged iron phthalocyanine nanofibers by activating peroxymonosulfate in dark condition
TL;DR: In this paper , the authors used the monoaminotrinitro iron phthalocyanine (FeMATNPc) to connect with isonicotinic acid (INA) for amide bonding and axial coordination.
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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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.
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