Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 770, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.scitotenv.2021.145311
Keywords
Cobalt-based catalysts; Peroxydisulfate/peroxymonosulfate activation; Organic removal; Water remediation; Activation mechanisms
Categories
Funding
- Key research and development projects of Anhui Province [202004a06020007]
- Natural Science Foundation of Anhui Province [2008085QB72]
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This article summarizes recent advances in cobalt-based catalysts for PDS/PMS activation in sulfate radical-based advanced oxidation processes (SR-AOPs), including preparation methods, applications, activation mechanisms, and influencing factors of different cobalt-based catalysts. Future challenges and applications of cobalt-based catalysts are also discussed at the end of the paper.
Sulfate radical-based advanced oxidation processes (SR-AOPs) have attracted increasing attention for the degradation of organic contaminants in water. The oxidants of SR-AOPs could be activated to generate different kinds of reactive oxygen species (ROS, e.g., hydroxyl radicals (center dot OH), sulfate radicals (SO4 center dot(-)), singlet oxygen (O-1(2)), and superoxide radicals (O-2 center dot(-))) by various catalysts. As one of the promising catalysts, cobalt-based catalysts have been extensively investigated in catalytic activity and stability during water remediation. This article mainly summarizes recent advances in preparation and applications of cobalt-based catalysts on peroxydisulfate (PDS)/peroxymonosulfate (PMS) activation since 2016. The review covers the development of homogeneous cobalt ions, cobalt oxides, supported cobalt composites, and cobalt-based mixed metal oxides for PDS/PMS activation, especially for the latest nanocomposites such as cobalt-based metal-organic frameworks and single-atom catalysts. This article also discussed the activation mechanisms and the influencing factors of different cobalt-based catalysts for activating PDS/PMS. Finally, the future perspectives on the challenges and applications of cobalt-based catalysts are presented at the end of this paper. (C) 2021 Elsevier B.V. All rights reserved.
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