Activation of Peroxymonosulfate by Chrysotile to Degrade Dyes in Water: Performance Enhancement and Activation Mechanism

An environmentally friendly activation method of peroxymonosulfate (PMS) provides a promising advanced oxidation processes for the degradation of organic wastewater. In this article, chrysotile, extracted from asbestos tailings, was found to be a kind of one-off catalyst relying on hydroxyl groups t...

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Main Authors: Ying Dai, Qian Peng, Kun Liu, Xuekun Tang, Muyang Zhou, Kun Jiang, Binnan Zhu
Format: Article
Language:English
Published: MDPI AG 2021-04-01
Series:Minerals
Subjects:
Online Access:https://www.mdpi.com/2075-163X/11/4/400
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spelling doaj-d3aa41a5c54848c4a69ba4fcc07332f22021-04-10T23:03:39ZengMDPI AGMinerals2075-163X2021-04-011140040010.3390/min11040400Activation of Peroxymonosulfate by Chrysotile to Degrade Dyes in Water: Performance Enhancement and Activation MechanismYing Dai0Qian Peng1Kun Liu2Xuekun Tang3Muyang Zhou4Kun Jiang5Binnan Zhu6School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha 410083, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha 410083, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha 410083, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha 410083, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha 410083, ChinaNanjing Kelilin Environmental Protection Technology Co., Ltd., Nanjing 211200, ChinaAn environmentally friendly activation method of peroxymonosulfate (PMS) provides a promising advanced oxidation processes for the degradation of organic wastewater. In this article, chrysotile, extracted from asbestos tailings, was found to be a kind of one-off catalyst relying on hydroxyl groups to activate PMS. Furthermore, the activation performance of the chrysotile had been greatly improved by the mean of calcining at 850 °C (850CC). It is worth mentioning that 850CC could not only realize three effective cycles, but also the mineralization ratio of Rhodamine B (RhB) could be impressively higher than 60%. According to characterization results, it was discovered that the chrysotile had transformed into forsterite with a fibrous morphology after calcination at 850 °C due to the loss of hydroxyl groups and the recombination of silicon, oxygen and magnesium atoms. Besides, the main active species produced by 850CC activating PMS were singlet oxygen and sulfate radicals. Further studies uncovered that PMS was successfully activated by a large number of unsaturated coordination oxygen on 850CC surface, and the activation mechanism was further elucidated. This study provides a new route for the comprehensive utilization of chrysotile and a valuable strategy for the degradation of hazardous organic pollutants in wastewater by PMS activation.https://www.mdpi.com/2075-163X/11/4/400chrysotileperoxymonosulfateforsteriteRhodamine Bsinglet oxygensulfate radicals
collection DOAJ
language English
format Article
sources DOAJ
author Ying Dai
Qian Peng
Kun Liu
Xuekun Tang
Muyang Zhou
Kun Jiang
Binnan Zhu
spellingShingle Ying Dai
Qian Peng
Kun Liu
Xuekun Tang
Muyang Zhou
Kun Jiang
Binnan Zhu
Activation of Peroxymonosulfate by Chrysotile to Degrade Dyes in Water: Performance Enhancement and Activation Mechanism
Minerals
chrysotile
peroxymonosulfate
forsterite
Rhodamine B
singlet oxygen
sulfate radicals
author_facet Ying Dai
Qian Peng
Kun Liu
Xuekun Tang
Muyang Zhou
Kun Jiang
Binnan Zhu
author_sort Ying Dai
title Activation of Peroxymonosulfate by Chrysotile to Degrade Dyes in Water: Performance Enhancement and Activation Mechanism
title_short Activation of Peroxymonosulfate by Chrysotile to Degrade Dyes in Water: Performance Enhancement and Activation Mechanism
title_full Activation of Peroxymonosulfate by Chrysotile to Degrade Dyes in Water: Performance Enhancement and Activation Mechanism
title_fullStr Activation of Peroxymonosulfate by Chrysotile to Degrade Dyes in Water: Performance Enhancement and Activation Mechanism
title_full_unstemmed Activation of Peroxymonosulfate by Chrysotile to Degrade Dyes in Water: Performance Enhancement and Activation Mechanism
title_sort activation of peroxymonosulfate by chrysotile to degrade dyes in water: performance enhancement and activation mechanism
publisher MDPI AG
series Minerals
issn 2075-163X
publishDate 2021-04-01
description An environmentally friendly activation method of peroxymonosulfate (PMS) provides a promising advanced oxidation processes for the degradation of organic wastewater. In this article, chrysotile, extracted from asbestos tailings, was found to be a kind of one-off catalyst relying on hydroxyl groups to activate PMS. Furthermore, the activation performance of the chrysotile had been greatly improved by the mean of calcining at 850 °C (850CC). It is worth mentioning that 850CC could not only realize three effective cycles, but also the mineralization ratio of Rhodamine B (RhB) could be impressively higher than 60%. According to characterization results, it was discovered that the chrysotile had transformed into forsterite with a fibrous morphology after calcination at 850 °C due to the loss of hydroxyl groups and the recombination of silicon, oxygen and magnesium atoms. Besides, the main active species produced by 850CC activating PMS were singlet oxygen and sulfate radicals. Further studies uncovered that PMS was successfully activated by a large number of unsaturated coordination oxygen on 850CC surface, and the activation mechanism was further elucidated. This study provides a new route for the comprehensive utilization of chrysotile and a valuable strategy for the degradation of hazardous organic pollutants in wastewater by PMS activation.
topic chrysotile
peroxymonosulfate
forsterite
Rhodamine B
singlet oxygen
sulfate radicals
url https://www.mdpi.com/2075-163X/11/4/400
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