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International Journal of Environmental Studies Volume 81, 2024 - Issue 2: Sustainable Development Goals in action
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Article

Degradation of antibiotic sulphamethoxazole by application of modified photo-Fenton processes: kinetics, degradation pathways and toxicity

Camila de Oliveira Cardoso Nascimentoa Department of Chemical Engineering, Western Paraná State University-UNIOESTE, Toledo, BrazilCorrespondence[email protected]
ORCID Iconhttps://orcid.org/0000-0003-1714-2358
ORCID Icon,
Soraya Moreno Palácioa Department of Chemical Engineering, Western Paraná State University-UNIOESTE, Toledo, BrazilORCID Iconhttps://orcid.org/0000-0002-7821-6907
ORCID Icon,
Márcia Teresinha Veita Department of Chemical Engineering, Western Paraná State University-UNIOESTE, Toledo, BrazilORCID Iconhttps://orcid.org/0000-0003-4515-0128
ORCID Icon,
Fernando Henrique Borbab Postgraduate Program of Environment and Sustainable Technologies, Federal University of Fronteira Sul, Cerro Largo, BrazilORCID Iconhttps://orcid.org/0000-0001-5019-020X
ORCID Icon,
Camila Fernanda Zorzob Postgraduate Program of Environment and Sustainable Technologies, Federal University of Fronteira Sul, Cerro Largo, BrazilORCID Iconhttps://orcid.org/0000-0002-9231-1062
ORCID Icon &
Daieni Vieira Amadoa Department of Chemical Engineering, Western Paraná State University-UNIOESTE, Toledo, BrazilORCID Iconhttps://orcid.org/0000-0002-3853-6092
ORCID Icon
Pages 693-723 | Published online: 26 Mar 2024
 
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ABSTRACT

Degradation of antibiotic sulphamethoxazole (SMX) was studied by applying modified photo-Fenton reactions (MPF) with the novel choice of using sodium tripolyphosphate (STP) and sodium hexametaphosphate (SHP) complexing agents. STP and SHP have a strong ability as complexing agents because they can sequester and complex with different ions. Process optimisation was performed using Doehlert design at pH = 6. This study presented higher performance for MPF using STP and SHP complexing agents than conventional photo-Fenton and H2O2 + UV process. The best yields were associated with the formation of a smaller number of intermediates with high degradation efficiency and low oxidative stress, environment-friendly and promising processes.

Acknowledgments

The authors gratefully acknowledge financial support for this work from the Brazilian research funding agency CAPES (Federal Agency for the Support and Improvement of Higher Education).

Disclosure statement

No potential conflict of interest was reported by the author(s).

Supplementary Information

Supplemental data for this article can be accessed online at https://doi.org/10.1080/00207233.2024.2322896

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