1. Rapid removal of high-concentration Rhodamine B by peroxymonosulfate activated with Co 3 O 4 -Fe 3 O 4 composite loaded on rice straw biochar.
- Author
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Liu H, Deng S, Xu J, Liu L, Chen C, Lan Y, Li Y, and Li W
- Subjects
- Peroxides, Oryza
- Abstract
In this study, rice straw biochar modified with Co
3 O4 -Fe3 O4 (RSBC@Co3 O4 -Fe3 O4 ) was successfully prepared via calcinating oxalate coprecipitation precursor and employed as a catalyst to activate peroxymonosulfate (PMS) for the treatment of Rhodamine B (RhB)-simulated wastewater. The results indicated that RSBC@Co3 O4 -Fe3 O4 exhibited high catalytic performance due to the synergy between Co3 O4 and Fe3 O4 doping into RSBC. Approximately 98% of RhB (180 mg/L) was degraded in the RSBC@Co3 O4 -Fe3 O4 /PMS system at initial pH 7 within 15 min. The degradation efficiency of RhB maintained over 90% after the fourth cycle, illustrating that RSBC@Co3 O4 -Fe3 O4 displayed excellent stability and reusability. The primary reactive oxygen species (ROS) answerable for the degradation of RhB were1 O2 , •OH, and SO4 •- . Moreover, the intermediates involved in the degradation of RhB were identified and the possible degradation pathways were deduced. This work can provide a new approach to explore Co-based and BC-based catalysts for the degradation of organic pollutants., (© 2022. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)- Published
- 2023
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