Applying bottom ash as an alternative Fenton catalyst for effective removal of phenol from aqueous environment.

Autor: Hollanda LR; Department of Chemical Engineering, Federal University of Rio Grande Do Norte, Natal, 59078-970, Brazil., de Souza JAB; Department of Chemical Engineering, Federal University of Rio Grande Do Norte, Natal, 59078-970, Brazil., Foletto EL; Department of Chemical Engineering, Federal University of Santa Maria, Santa Maria, 97105-900, Brazil., Dotto GL; Department of Chemical Engineering, Federal University of Santa Maria, Santa Maria, 97105-900, Brazil. guilherme_dotto@yahoo.com.br., Chiavone-Filho O; Department of Chemical Engineering, Federal University of Rio Grande Do Norte, Natal, 59078-970, Brazil.
Jazyk: angličtina
Zdroj: Environmental science and pollution research international [Environ Sci Pollut Res Int] 2023 Dec; Vol. 30 (57), pp. 120763-120774. Date of Electronic Publication: 2023 Nov 09.
DOI: 10.1007/s11356-023-30890-1
Abstrakt: In this study, coal bottom ash from a thermoelectric plant was tested as an alternative Fenton catalyst for phenol degradation in water. The effect of operating parameters such as initial pH, catalyst dosage and H 2 O 2 concentration were evaluated. The characterization results indicated that the material has a mesoporous structure, with active species (Fe) well distributed on its surface. Under the optimal reaction conditions (6 mM H 2 O 2 , 1 g L -1 of catalyst and pH = 3), 98.7% phenol degradation efficiency was achieved in 60 min, as well as 71.6% TOC removal after 150 min. Hydroxyl radical was identified as the main oxidizing agent involved on the cleavage of the phenol molecule. After four consecutive reuse cycles, phenol degradation efficiency was around 80%, indicating good reusability and stability of the catalyst. Therefore, the obtained results demonstrated that the bottom ash presents remarkable activity for application in the Fenton reaction towards phenol degradation.
(© 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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