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In relation to this article, we declare that there is no conflict of interest.
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Received December 26, 2019
Accepted February 27, 2020
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Kinetics and mechanism study of H-acid degradation by peroxymonosulfate activation with Co3O4-Fe2O3/Al2O3

College of Electromechanical Engineering, Qingdao University of Science & Technology, Qingdao, P. R. China 1College of Chemical Engineering, Qingdao University of Science & Technology, Qingdao, P. R. China 2Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian, P. R. China
Korean Journal of Chemical Engineering, June 2020, 37(6), 961-968(8), 10.1007/s11814-020-0525-2
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Abstract

Alumina supported bimetallic cobalt-iron oxide (Co3O4-Fe2O3/Al2O3) catalyst was prepared via co-impregnation of boehmite with the mixture solution of cobalt nitrate and iron nitrate followed by calcination in air. X-ray photoelectron spectroscopy and high-resolution transmission electron microscope analyses confirmed the existence of highly dispersed Co3O4 and Fe2O3 nanoparticles in the as-prepared catalysts. The catalytic activity of Co3O4-Fe2O3/Al2O3 was evaluated for the degradation of H-acid in aqueous solution by heterogeneous activation of peroxymonosulfate. The results indicated that the Co3O4-Fe2O3/Al2O3 catalyst exhibited an identical initial activity but much better recyclability than Co3O4/Al2O3 due to its low amount of metal leaching and possible redox circle of Co(II)/Co(III). Electron paramagnetic resonance spectroscopy and radical quenching experiments suggested that singlet oxygen (1O2) contributed much more than ㆍOH and SO4 ㆍ to H-acid degradation, and the degradation mainly followed a nonradical reaction mechanism.

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