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Review

Evolution of Singlet Oxygen by Activating Peroxydisulfate and Peroxymonosulfate: A Review

School of Environmental Studies, China University of Geosciences, Wuhan 430074, China
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Author to whom correspondence should be addressed.
Academic Editor: Chunping Yang
Int. J. Environ. Res. Public Health 2021, 18(7), 3344; https://0-doi-org.brum.beds.ac.uk/10.3390/ijerph18073344
Received: 8 March 2021 / Revised: 18 March 2021 / Accepted: 19 March 2021 / Published: 24 March 2021
(This article belongs to the Collection Environmental Chemistry and Technology)
Advanced oxidation processes (AOPs) based on peroxydisulfate (PDS) or peroxymonosulfate (PMS) activation have attracted much research attention in the last decade for the degradation of recalcitrant organic contaminants. Sulfate (SO4•−) and hydroxyl (OH) radicals are most frequently generated from catalytic PDS/PMS decomposition by thermal, base, irradiation, transition metals and carbon materials. In addition, increasingly more recent studies have reported the involvement of singlet oxygen (1O2) during PDS/PMS-based AOPs. Typically, 1O2 can be produced either along with SO4•− and OH or discovered as the dominant reactive oxygen species (ROSs) for pollutants degradation. This paper reviews recent advances in 1O2 generation during PDS/PMS activation. First, it introduces the basic chemistry of 1O2, its oxidation properties and detection methodologies. Furthermore, it elaborates different activation strategies/techniques, including homogeneous and heterogeneous systems, and discusses the possible reaction mechanisms to give an overview of the principle of 1O2 production by activating PDS/PMS. Moreover, although 1O2 has shown promising features such as high degradation selectivity and anti-interference capability, its production pathways and mechanisms remain controversial in the present literatures. Therefore, this study identifies the research gaps and proposes future perspectives in the aspects of novel catalysts and related mechanisms. View Full-Text
Keywords: singlet oxygen; peroxydisulfate; peroxymonosulfate; activation; organic contaminants; degradation singlet oxygen; peroxydisulfate; peroxymonosulfate; activation; organic contaminants; degradation
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MDPI and ACS Style

Xiao, G.; Xu, T.; Faheem, M.; Xi, Y.; Zhou, T.; Moryani, H.T.; Bao, J.; Du, J. Evolution of Singlet Oxygen by Activating Peroxydisulfate and Peroxymonosulfate: A Review. Int. J. Environ. Res. Public Health 2021, 18, 3344. https://0-doi-org.brum.beds.ac.uk/10.3390/ijerph18073344

AMA Style

Xiao G, Xu T, Faheem M, Xi Y, Zhou T, Moryani HT, Bao J, Du J. Evolution of Singlet Oxygen by Activating Peroxydisulfate and Peroxymonosulfate: A Review. International Journal of Environmental Research and Public Health. 2021; 18(7):3344. https://0-doi-org.brum.beds.ac.uk/10.3390/ijerph18073344

Chicago/Turabian Style

Xiao, Guangfeng, Tiantian Xu, Muhammad Faheem, Yanxing Xi, Ting Zhou, Haseeb T. Moryani, Jianguo Bao, and Jiangkun Du. 2021. "Evolution of Singlet Oxygen by Activating Peroxydisulfate and Peroxymonosulfate: A Review" International Journal of Environmental Research and Public Health 18, no. 7: 3344. https://0-doi-org.brum.beds.ac.uk/10.3390/ijerph18073344

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