Journal ArticleDOI
Heterogeneous Activation of Oxone Using Co3O4
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TLDR
This study is perhaps the first study that documents the heterogeneous activation of peroxymonosulfate with cobalt, the best-known catalyst-activator for this inorganic peroxide.Abstract:
This study explores the potential of heterogeneous activation of Oxone (peroxymonosulfate) in water using cobalt oxides. Two commercially available cobalt oxides, CoO and Co3O4 (CoO·Co2O3) were tested for the activation of peroxymonosulfate and the consequent oxidation of 2,4-dichlorophenol (2,4-DCP) via a sulfate radical mechanism. Both systems, CoO/Oxone and Co3O4/Oxone, were tested at acidic and neutral pH and compared with the homogeneous Co(NO3)2/Oxone. The activity of these systems was evaluated on the basis of the induced transformation of 2,4-DCP as well as the dissolution of cobalt occurred after 2 h of reaction. It was observed that only Co3O4 activates peroxymonosulfate heterogeneously, with its heterogeneity being more pronounced at neutral pH. Both CoO and Co2O3 contained in Co3O4 might be responsible for the observed heterogeneity, and the relative mechanisms are further discussed here. To our knowledge, this is perhaps the first study that documents the heterogeneous activation of peroxymon...read more
Citations
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Journal ArticleDOI
Generation of sulfate radical through heterogeneous catalysis for organic contaminants removal: Current development, challenges and prospects
TL;DR: In this paper, the authors provide a state-of-the-art review on the development in heterogeneous catalysts including single metal, mixed metal, and nonmetal carbon catalysts for organic contaminants removal, with particular focus on peroxymonosulfate (PMS) activation.
Journal ArticleDOI
Application of peroxymonosulfate and its activation methods for degradation of environmental organic pollutants: Review
Farshid Ghanbari,Mahsa Moradi +1 more
TL;DR: A literature review on environmental application of peroxymonosulfate (PMS) in degradation of contaminants to clarify the performance of PMS is carried out in this paper, which describes the PMS usage in remediation of environmental pollutants with focus on the different methods of activation and the effect of main operational parameters on PMS-based processes.
Journal ArticleDOI
Cobalt-catalyzed sulfate radical-based advanced oxidation: A review on heterogeneous catalysts and applications
Peidong Hu,Mingce Long +1 more
TL;DR: In this paper, the state-of-the-art progress on various heterogeneous cobalt-based catalysts for sulfate radical-based advanced oxidation processes (SR-AOPs) is reviewed.
Journal ArticleDOI
Persulfate-Based Advanced Oxidation: Critical Assessment of Opportunities and Roadblocks.
TL;DR: This Critical Review comparatively examines the activation mechanisms of peroxymonosulfate and peroxydisulfates and the formation pathways of oxidizing species and the impacts of water parameters and constituents such as pH, background organic matter, halide, phosphate, and carbonate on persulfate-driven chemistry.
Journal ArticleDOI
Chemistry of persulfates in water and wastewater treatment: A review
Stanisław Wacławek,Holger V. Lutze,Klaudiusz Grübel,Vinod V.T. Padil,Miroslav Černík,Dionysios D. Dionysiou +5 more
TL;DR: In this paper, the authors provide an overview of various methods for analysis of persulfate decontamination and their analysis is often prone for interference by other matrix components and hampered by the low stability of peroxydisulfate and peroxymonosulfate in aqueous systems.
References
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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.
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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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Rate constants and mechanism of reaction of sulfate radical anion with aromatic compounds
TL;DR: In this paper, the exact rate constants for.SO/sub 4/sup -/ with substituted benzenes and benzoates have been determined by pulse radiolysis.
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Transition metal/UV-based advanced oxidation technologies for water decontamination
TL;DR: In this paper, the effect of ultraviolet (UV) light radiation and/or transition metals (M) for the activation of common oxidants (Ox) with the objective of treating recalcitrant organic contaminants in water was explored.
Journal ArticleDOI
Efficient Decomposition of Environmentally Persistent Perfluorocarboxylic Acids by Use of Persulfate as a Photochemical Oxidant
Hisao Hori,Ari Yamamoto,Etsuko Hayakawa,Sachi Taniyasu,Nobuyoshi Yamashita,Shuzo Kutsuna,Hiroshi Kiatagawa,Ryuichi Arakawa +7 more
TL;DR: This method was successfully applied to the decomposition of perfluorononanoic acid contained in a floor wax solution, and all sulfur-containing species in the reaction solution were eventually transformed to sulfate ions by this method.