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
MOF-templated Hollow Cobalt Sulfide as an Enhanced Oxone Activator for Degradation of UV Absorber: Key Role of Sulfur Vacancy-Induced Highly Active CoII Sites
Ta Cong Khiem,Xiaoguang Duan,Wei-jie Liu,Young-Kwon Park,Ha Manh Bui,Wen-Da Oh,Suresh Ghotekar,Yiu Fai Tsang,Kun-Yi Andrew Lin +8 more
TL;DR: In this paper , hollow rhombic cobalt sulfide (HRCS) was designed via a single-step sulfidation of cobaltic metal organic framework (CoMOF) as a template, which was then employed for degradation of Novantisol (NVT), a sunscreen agent, through Oxone activation.
Journal ArticleDOI
Efficient atrazine degradation via photoactivated SR-AOP over S-BUC-21(Fe): the formation and contribution of different reactive oxygen species
TL;DR: In this article , a Fe-based MOF S-BUC-21(Fe) with superior catalytic activity in peroxymonosulfate (PMS) activation to remove atrazine (ATZ) is reported, in which ATZ was completely degraded within 20.0 min in the presence of 0.1 g/L S-BCU 21(Fe), 0.4 mM PMS and LED UV light irradiation.
Journal ArticleDOI
Efficient activation of persulfate by C@Fe3O4 in visible-light for tetracycline degradation.
TL;DR: In this paper , a C@Fe3O4/PS/Vis catalytic system removed pollutants by the formation of O2-, 1O2, hydroxyl radicals (•OH) and sulfate radicals (SO4•-) species for degrading tetracycline.
Journal ArticleDOI
The simplest and ultrafast microwave-mediated solid-state construction of cobalt oxide/carbon hybrid as an efficient peroxymonosulfate activator for ciprofloxacin degradation
TL;DR: In this paper , a microwave-engaged solid-state method was proposed to synthesize carbon black supported Co 3 O 4 composite (Co3 O 4 /CB) for degradation of ciprofloxacin (CIP) via activating peroxymonosulfate (PMS).
Journal ArticleDOI
Insight into the activation mechanisms of biochar by boric acid and its application for the removal of sulfamethoxazole
TL;DR: In this paper , boric acid activated biochar (B-BC) was used to enhance the generation of micropores during the pyrolysis process and improve the yield of biochar via transformation pathways of C-corresponding bonds and physical blocking.
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