Degradation of organic contaminants in the CoFe2O4/peroxymonosulfate process: The overlooked role of Co(II)-PMS complex

Cobalt ferrite (CoFe2O4) has been widely employed as a catalyst for the activation of peroxymonosulfate (PMS), in which hydroxyl radicals (•OH) and sulfate radicals (SO4•−) are generally recognized as the main reactive species responsible for the degradation of pollutants. In this study, we find tha...

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Autores principales:	Xinhong Li, Zihao Zhao, Hongchao Li, Jieshu Qian
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Peroxymonosulfate Advanced oxidation processes Cobalt ferrite Water treatment Co(II)-PMS complex complex Chemical engineering TP155-156
Acceso en línea:	https://doaj.org/article/45f9a62f710a4e6887a243625985d1fe
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spelling	oai:doaj.org-article:45f9a62f710a4e6887a243625985d1fe2021-11-18T04:52:44ZDegradation of organic contaminants in the CoFe2O4/peroxymonosulfate process: The overlooked role of Co(II)-PMS complex2666-821110.1016/j.ceja.2021.100143https://doaj.org/article/45f9a62f710a4e6887a243625985d1fe2021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2666821121000594https://doaj.org/toc/2666-8211Cobalt ferrite (CoFe2O4) has been widely employed as a catalyst for the activation of peroxymonosulfate (PMS), in which hydroxyl radicals (•OH) and sulfate radicals (SO4•−) are generally recognized as the main reactive species responsible for the degradation of pollutants. In this study, we find that both one-electron transfer and oxygen-atom transfer reactions are involved in the CoFe2O4/PMS process, by using methyl phenyl sulfoxide (MPSO) as a chemical probe. Results from radical quenching and electron paramagnetic resonance (EPR) experiments indicate that the free radicals (i.e., •OH and SO4•−) play only a minor role in the degradation of sulfamethoxazole (SMX). A mechanism involving Co(II)-PMS complex both on the surface of CoFe2O4 and in solution as the dominant reactive species is proposed. Furthermore, the degradation performance of SMX under different conditions were investigated to further cognize the Co(II)-PMS complex-mediated oxidation process. This study broadens our understanding of the role of transition metal-based catalysts in the activation of PMS for the degradation of organic pollutants.Xinhong LiZihao ZhaoHongchao LiJieshu QianElsevierarticlePeroxymonosulfateAdvanced oxidation processesCobalt ferriteWater treatmentCo(II)-PMS complex complexChemical engineeringTP155-156ENChemical Engineering Journal Advances, Vol 8, Iss , Pp 100143- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Peroxymonosulfate Advanced oxidation processes Cobalt ferrite Water treatment Co(II)-PMS complex complex Chemical engineering TP155-156
spellingShingle	Peroxymonosulfate Advanced oxidation processes Cobalt ferrite Water treatment Co(II)-PMS complex complex Chemical engineering TP155-156 Xinhong Li Zihao Zhao Hongchao Li Jieshu Qian Degradation of organic contaminants in the CoFe2O4/peroxymonosulfate process: The overlooked role of Co(II)-PMS complex
description	Cobalt ferrite (CoFe2O4) has been widely employed as a catalyst for the activation of peroxymonosulfate (PMS), in which hydroxyl radicals (•OH) and sulfate radicals (SO4•−) are generally recognized as the main reactive species responsible for the degradation of pollutants. In this study, we find that both one-electron transfer and oxygen-atom transfer reactions are involved in the CoFe2O4/PMS process, by using methyl phenyl sulfoxide (MPSO) as a chemical probe. Results from radical quenching and electron paramagnetic resonance (EPR) experiments indicate that the free radicals (i.e., •OH and SO4•−) play only a minor role in the degradation of sulfamethoxazole (SMX). A mechanism involving Co(II)-PMS complex both on the surface of CoFe2O4 and in solution as the dominant reactive species is proposed. Furthermore, the degradation performance of SMX under different conditions were investigated to further cognize the Co(II)-PMS complex-mediated oxidation process. This study broadens our understanding of the role of transition metal-based catalysts in the activation of PMS for the degradation of organic pollutants.
format	article
author	Xinhong Li Zihao Zhao Hongchao Li Jieshu Qian
author_facet	Xinhong Li Zihao Zhao Hongchao Li Jieshu Qian
author_sort	Xinhong Li
title	Degradation of organic contaminants in the CoFe2O4/peroxymonosulfate process: The overlooked role of Co(II)-PMS complex
title_short	Degradation of organic contaminants in the CoFe2O4/peroxymonosulfate process: The overlooked role of Co(II)-PMS complex
title_full	Degradation of organic contaminants in the CoFe2O4/peroxymonosulfate process: The overlooked role of Co(II)-PMS complex
title_fullStr	Degradation of organic contaminants in the CoFe2O4/peroxymonosulfate process: The overlooked role of Co(II)-PMS complex
title_full_unstemmed	Degradation of organic contaminants in the CoFe2O4/peroxymonosulfate process: The overlooked role of Co(II)-PMS complex
title_sort	degradation of organic contaminants in the cofe2o4/peroxymonosulfate process: the overlooked role of co(ii)-pms complex
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/45f9a62f710a4e6887a243625985d1fe
work_keys_str_mv	AT xinhongli degradationoforganiccontaminantsinthecofe2o4peroxymonosulfateprocesstheoverlookedroleofcoiipmscomplex AT zihaozhao degradationoforganiccontaminantsinthecofe2o4peroxymonosulfateprocesstheoverlookedroleofcoiipmscomplex AT hongchaoli degradationoforganiccontaminantsinthecofe2o4peroxymonosulfateprocesstheoverlookedroleofcoiipmscomplex AT jieshuqian degradationoforganiccontaminantsinthecofe2o4peroxymonosulfateprocesstheoverlookedroleofcoiipmscomplex
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Degradation of organic contaminants in the CoFe2O4/peroxymonosulfate process: The overlooked role of Co(II)-PMS complex

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