期刊
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
卷 132, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jtice.2022.104209
关键词
Advanced oxidation processes; Synergistic activation; Biochar; Multi-level porous; Degradation of tetracycline
资金
- National Natural Science Foundation of China [22166023]
- Gansu Provincial Department of Education: Youth Doctoral Fund project [2021QB-010]
- Fundamental Research Funds for the Central Universities [lzujbky-2021-73]
- Lanzhou University-Jinchuan Group Chemical Co., Ltd. Chemical Environmental Protection Industry Joint Laboratory [(20) 0837]
In this study, a biochar modified cobalt-iron bimetallic composite catalyst with a unique multi-level porous layered structure was prepared. This catalyst demonstrated high efficiency in degrading refractory organic pollutants and possessed environmentally friendly and sustainable characteristics.
Background: Based on the advanced oxidation process of transition metal activated peroxymonosulfate (PMS), a heterogeneous catalyst with simple synthesis strategy and high efficiency was prepared. It was used to remove refractory organic pollutants. Methods: We designed a biochar modified cobalt-iron bimetallic composite catalyst (BC@CFC) via co-precipitation and calcination methods using biomass and cobalt-iron layered double hydroxide as precursors. Significant Findings: BC1@CF2C exhibited a unique multi-level porous layered structure, which reasonably reduced the agglomeration of cobalt-iron composite and increased the specific surface area. This allowed the catalyst to create more exposed active sites and favorably activate PMS, with a rapid and efficient degradation of tetracycline (TC) in 5 min (92.49%+/- 0.21%) and 30 min (96.63%+/- 1.68%). BC1@CF2C was magnetic and easy to recover, it maintained a superior TC removal rate (about 90%) after 5 cycles. This remarkable performance was benefited from the synergistic effect of cobalt-iron bimetal to enhance the activation effect of PMS, which led to the production of sulfate free radicals (SO4 center dot-) and hydroxyl free radicals (center dot OH) to further attack TC. BC@CFC possessed the advantages of being environment-friendly, high catalytic activity and sustainability, which could be of great value in environmental application. (C) 2022 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
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