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Cu-coupled Fe/Fe 3 C covered with thin carbon as stable win-win catalysts to boost electro-Fenton reaction for brewing leachate treatment.
- Source :
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Chemosphere [Chemosphere] 2022 Apr; Vol. 293, pp. 133532. Date of Electronic Publication: 2022 Jan 04. - Publication Year :
- 2022
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Abstract
- The electro-Fenton oxidation is one of the powerful approaches for achieving the complete mineralization of organic pollutants in water. The key dilemma for efficient industrial application of electro-Fenton oxidation is the complicated post-processing of iron sludge, and the cost and risk associated with H <subscript>2</subscript> O <subscript>2</subscript> transportation and storage. Herein, Cu-coupled Fe/Fe <subscript>3</subscript> C covered with carbon layer on carbon felt (Cu-Fe/Fe <subscript>3</subscript> C@C), engineered by a hydrothermal reaction followed by the consequent thermal-treatment in N <subscript>2</subscript> atmosphere, as a self-supported integrated cathode were used for an onsite oxygen reduction reaction and a Fenton oxidation reaction. Experimental evidences demonstrate that, at the operating potential of -1.1 V, Fe <subscript>3</subscript> C can selectively catalyze O <subscript>2</subscript> into H <subscript>2</subscript> O <subscript>2</subscript> by 2e reduction pathways with assistance of metal Cu. Meanwhile, metal Fe and Cu incorporated into Cu-Fe/Fe <subscript>3</subscript> C@C simultaneously motivate the onsite Fenton oxidation arose by H <subscript>2</subscript> O <subscript>2</subscript> . Such a win-win catalyst presented high activity in the electro-Fenton process. In acidic environment, the efficient mineralization rate of methylene blue, nitrobenzene, phenol, and bisphenol A can reach more than 70% in 60 min, as well as the excellent stability and durability due to the protection of graphited carbon layer. Compared with tradition electrochemical degrade system, the prepared Cu-Fe/Fe <subscript>3</subscript> C@C electrode as cathode for practical refractory brewing leachate treatment reveal more efficient decolorization and mineralization, saving 14.3% of electricity.<br /> (Copyright © 2022 Elsevier Ltd. All rights reserved.)
Details
- Language :
- English
- ISSN :
- 1879-1298
- Volume :
- 293
- Database :
- MEDLINE
- Journal :
- Chemosphere
- Publication Type :
- Academic Journal
- Accession number :
- 34995622
- Full Text :
- https://doi.org/10.1016/j.chemosphere.2022.133532