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Review

Degradation of Micropollutants and Formation of Oxidation By-Products during the Ozone/Peroxymonosulfate System: A Critical Review

by 1,2, 1,2, 1,2, 1,2, 3 and 1,2,*
1
Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi’an University of Architecture and Technology, Xi’an 710055, China
2
Shaanxi Key Laboratory of Environmental Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China
3
State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
*
Author to whom correspondence should be addressed.
Academic Editors: Minghao Sui and Tian Li
Water 2021, 13(21), 3126; https://doi.org/10.3390/w13213126
Received: 9 October 2021 / Revised: 29 October 2021 / Accepted: 3 November 2021 / Published: 5 November 2021
The O3/PMS system has appeared as an effective wastewater treatment method because of the simultaneous generation of hydroxyl radicals (OH) and sulfate radicals (SO4•−). Many research achievements have been made on the degradation of micropollutants and the reaction mechanism of the O3/PMS system. However, an integral understanding of the O3/PMS system is lacking, which limits the development of safe and effective AOP-based water treatment schemes. Therefore, in this review, the degradation effects, toxicity changes, and reaction mechanisms of various micropollutants in the O3/PMS system are reviewed. The formation of oxidation by-products (OBPs) is an important issue that affects the practical application of O3/PMS systems. The formation mechanism and control methods of OBPs in the O3/PMS system are overviewed. In addition, the influence of different reaction conditions on the O3/PMS system are comprehensively evaluated. Finally, future research needs are proposed based on the limited understanding of O3/PMS systems in the degradation of micropollutants and formation of OBPs. Specifically, the formation rules of several kinds of OBPs during the O3/PMS system are not completely clear yet. Furthermore, pilot-scale research, the operational costs, sustainability, and general feasibility of the O3/PMS system also need to be studied. This review can offer a comprehensive assessment on the O3/PMS system to fill the knowledge gap and provide guidance for the future research and engineering applications of the O3/PMS system. Through this effort, the O3/PMS system can be better developed and turned towards practical applications. View Full-Text
Keywords: ozone; peroxymonosulfate; micropollutants; oxidation by-products ozone; peroxymonosulfate; micropollutants; oxidation by-products
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MDPI and ACS Style

Liu, Z.; Liang, Z.; Li, K.; Huang, T.; Ma, J.; Wen, G. Degradation of Micropollutants and Formation of Oxidation By-Products during the Ozone/Peroxymonosulfate System: A Critical Review. Water 2021, 13, 3126. https://doi.org/10.3390/w13213126

AMA Style

Liu Z, Liang Z, Li K, Huang T, Ma J, Wen G. Degradation of Micropollutants and Formation of Oxidation By-Products during the Ozone/Peroxymonosulfate System: A Critical Review. Water. 2021; 13(21):3126. https://doi.org/10.3390/w13213126

Chicago/Turabian Style

Liu, Zhao, Zhiting Liang, Kai Li, Tinglin Huang, Jun Ma, and Gang Wen. 2021. "Degradation of Micropollutants and Formation of Oxidation By-Products during the Ozone/Peroxymonosulfate System: A Critical Review" Water 13, no. 21: 3126. https://doi.org/10.3390/w13213126

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