Heterogeneous electro-Fenton removal of polyacrylamide in aqueous solution over CoFe 2 O 4 catalyst.

Autor:	Xu S; College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, Hubei, China., Yang Y; College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, Hubei, China., Li F; College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, Hubei, China E-mail: 100564@yangtzeu.edu.cn.
Jazyk:	angličtina
Zdroj:	Water science and technology : a journal of the International Association on Water Pollution Research [Water Sci Technol] 2024 Jun; Vol. 89 (12), pp. 3309-3324. Date of Electronic Publication: 2024 Jun 03.
DOI:	10.2166/wst.2024.180
Abstrakt:	Polyacrylamide (PAM) in environmental water has become a major problem in water pollution management due to its high molecular mass, high viscosity and non-absorption by soil. CoFe 2 O 4 with strong magnetic properties was prepared by solvent-thermal synthesis method and used as the catalyst for the removal on PAM in heterogeneous Electro-Fenton (EF) system. It showed that the removal efficiency of PAM by the heterogeneous EF system using CoFe 2 O 4 catalyst was 92.01% at pH 3 after 120 min. Further studies indicated that ·OH was the most significant active species for the removal of PAM, and the contribution of ·O 2 - and SO 4 ·- for the removal of PAM was less than 15%. The reusability test and XRD, XPS, FTIR analyses proved that the catalyst had good stability. After a repeated use for five times, the catalyst still had a high PAM removal rate and stable structure. The valence distribution and functional groups of the phase components of the catalyst did not change significantly before and after the reaction. The possible mechanism of catalyst activation of H 2 O 2 was deduced by mechanism investigation. The CoFe 2 O 4 is an efficient and promising catalyst for the removal of PAM wastewater. Competing Interests: The authors declare there is no conflict. (© 2024 The Authors This is an Open Access article distributed under the terms of the Creative Commons Attribution Licence (CC BY 4.0), which permits copying, adaptation and redistribution, provided the original work is properly cited (http://creativecommons.org/licenses/by/4.0/).)
Databáze:	MEDLINE
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