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
Removal of Sulfonamides in Water Usingan Electro/Peroxydisulfate System Catalyzedwith Activated Carbon
TL;DR: In this paper, an electro/peroxydisulfate system catalyzed with activated carbon (EC/AC/PS) was used to treat sulfamethoxazole (SMX).
Journal ArticleDOI
N-doped low-rank coal based carbon catalysts for heterogeneous activation of peroxymonosulfate for ofloxacin oxidation via electron transfer and non-radical pathway
TL;DR: In this article , N-doped low-rank coal based carbon catalysts (NLCs) were prepared under different urea and low-order coal ratios and pyrolysis temperatures, which showed excellent catalytic performance for peroxymonosulfate (PMS) activation.
Journal ArticleDOI
A dual purpose aluminum-based metal organic framework for the removal of chloramphenicol from wastewater.
TL;DR: In this paper , an aluminum-based metal-organic framework (Al-MIL) with high surface area and extended porosity, was prepared and used both as an adsorbent and catalyst for the oxidation of chloramphenicol.
Journal ArticleDOI
Surface Modification of Co3O4 Nanosheets to Promote Peroxymonosulfate Activation for Degradation of Atrazine
Journal ArticleDOI
Development of remediation technologies for organic contaminants informed by QSAR/QSPR models
TL;DR: It is shown that remediation parameters (e.g., dehalogenation rate constant) estimated by QSAR/QSPR models can inform the remediation technology design and this approach is suitable to be applied at the initial stage of remediation process development.
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
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