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Natural wood-derived charcoal embedded with bimetallic iron/cobalt sites to promote ciprofloxacin degradation.
- Source :
-
Journal of Cleaner Production . Aug2023, Vol. 414, pN.PAG-N.PAG. 1p. - Publication Year :
- 2023
-
Abstract
- Structural design of high-performing catalysts for boosting refractory organic pollutants degradation remains a great challenge. Herein, a natural wood-derived catalyst comprising of wood carbon and Fe/Co sites was proposed as the peroxymonosulfate (PMS) activator to enhance ciprofloxacin (CIP) pollutant degradation. The bimetallic Fe/Co sites were highly dispersed and stabilized on carbon surface. The carbon-based catalyst achieved 100% removal rate for CIP within 4 min. After four consecutive cycles, the removal rate still reached 92.8%, displaying separable and reusable ability of this catalyst. The carbon-based catalyst could also exhibit excellent degradation performance under a wide pH range of 2.0–8.0. Density functional theory (DFT) calculation revealed that Fe/Co sites at wood carbon had the high adsorption energy and induced interfacial electron transfer for enhanced breakage of O–O bond. The sulfate radical (SO 4 •−), hydroxyl radical (•OH) and singlet oxygen (1O 2) were main reactive oxygen species and their relative contribution was calculated to be 13.51%, 17.54% and 68.95%, respectively. The formed by-products and intermediates had almost no toxicity. This work proposes a new structural design of wood carbon-based system for enhancing antibiotic pollutant in aqueous environment, which facilitates the development of wastewater treatment technology. [Display omitted] • The wood carbon was proposed as the structural unit of the heterogeneous catalyst. • The Fe/Co sites were highly dispersed and stabilized at wood carbon. • The carbon-based catalyst achieved 100% removal rate for ciprofloxacin in 4 min. • The Fe/Co sites at wood carbon remarkably boosted interfacial charge transfer. • The formed by-products and intermediates had almost no toxicity. [ABSTRACT FROM AUTHOR]
- Subjects :
- *CHARCOAL
*IRON
*CIPROFLOXACIN
*WOOD
*HETEROGENEOUS catalysts
*HYDROXYL group
Subjects
Details
- Language :
- English
- ISSN :
- 09596526
- Volume :
- 414
- Database :
- Academic Search Index
- Journal :
- Journal of Cleaner Production
- Publication Type :
- Academic Journal
- Accession number :
- 164401689
- Full Text :
- https://doi.org/10.1016/j.jclepro.2023.137569