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Open AccessArticle

High-Efficiency Catalysis of Peroxymonosulfate by MgO for the Degradation of Organic Pollutants

1
School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
2
Hunan Key Laboratory of Mineral Materials and Application, Central South University, Changsha 410083, China
3
School of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
4
Xingfa School of Mining Engineering, Wuhan Institute of Technology, Wuhan 430074, China
*
Author to whom correspondence should be addressed.
Minerals 2020, 10(1), 2; https://doi.org/10.3390/min10010002
Received: 15 November 2019 / Revised: 13 December 2019 / Accepted: 16 December 2019 / Published: 18 December 2019
In the study, magnesium oxide (MgO) was used to catalyze peroxymonosulfate (PMS) for the degradation of organic pollutants for the first time. According to the single-factor experiment results, it was determined that MgO could efficiently catalyze PMS to degrade organic matters in a wide range of pH values. Based on radical quenching experiments and electron spinning resonance spectra, singlet oxygen was identified to be the crucial reactive species. Importantly, the oxygen vacancy on the surface of MgO was determined as the key active site, which accelerated the decomposition of PMS to produce singlet oxygen. This study provides an interesting insight into the novel and ignored catalyst of MgO for the highly efficient activation of PMS, which will greatly benefit the Fenton-like catalytic degradation of organic wastewater. View Full-Text
Keywords: Fenton-like catalysis; peroxymonosulfate; MgO; oxygen vacancy; singlet oxygen Fenton-like catalysis; peroxymonosulfate; MgO; oxygen vacancy; singlet oxygen
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MDPI and ACS Style

Peng, Q.; Tang, X.; Liu, K.; Luo, X.; He, D.; Dai, Y.; Huang, G. High-Efficiency Catalysis of Peroxymonosulfate by MgO for the Degradation of Organic Pollutants. Minerals 2020, 10, 2.

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