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Paint effluent treatment through the fenton-type coagulation process with peracetic acid and iron ions

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Abstract

The inappropriate discharge of industrial effluents into water bodies causes significant damage to the environment. Proper treatment and disposal are crucial for the conservation of aquatic ecosystems. Advanced oxidative processes are effective alternatives for treating complex effluents, including those generated in the production of paints. The Fenton process is particularly notable among advanced oxidative processes because of its high ability to oxidize persistent contaminants using hydrogen peroxide as an oxidizing agent and ferrous ions as a catalyst. The purpose of this study was to optimize the Fenton process and substitute hydrogen peroxide with peracetic acid and ferrous ions with ferric together with a coagulation process known as the Fenton-type coagulation process for treating paint production effluents. To assess the turbidity removal efficiency, varying concentrations of peracetic acid and ferric chloride were tested. Significant results were obtained with a concentration of 200 mgL−1 of ferric chloride and 15 mgL−1 of peracetic acid when the reagents were added simultaneously, resulting in a removal of 98.4%. For the chemical oxygen demand parameters, the reduction reached 76.8%, total solids were reduced by 85%, color removal was 98.6%, total coliforms were reduced by 96.6%, and Escherichia coli reduction reached 96.4%, accompanied by an increase in the sedimentation speed.

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Acknowledgements

The authors thank Conselho Nacional de Desenvolvimento Científico Tecnológico (CNPq-Brazil), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES-Brazil), Thech Desinfecção and the Graduate Program in Biodiversity and Biotechnology-BIONORTE. Renato A. Sarmento thanks CNPq, through the Research Productivity programme (Project 306011/2022-0), and Universal Project 405875/2021-5). We would like to thank Editage (www.editage.com) for English language editing.

Funding

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Coordination for the Improvement of Higher Education Personnel – Brazil (CAPES), Financing Code 001 CAPES; PROPESQ and the Federal University of Tocantins; CNPq (Conselho Nacional de Desenvolvimento Científico e Tecnológico, Brazil) Apoio à Formação de Doutores em Areas Estratégicas, project number: 142525/2020–0; Tocantins Research Support Foundation—FAPT; and PDPG-POSDOC (Programa de Desenvolvimento da Pós-Graduação (PDPG) Pós-Doutorado Estratégico—Postgraduate Development Program (PGDP) Strategic Postdoctoral) No. 88887.798251/2022–00. Project nº 400859/2019–0—Training of human resources in plant production and biotechnology and biodiversity in the Amazon.

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Authors and Affiliations

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Contributions

Thayrine Dias Carlos: Investigation, Writing—Original Draft; Renato de Almeida Sarmento: Supervision, Writing—Revision & Editing, Funding acquisition; Nelson Luis Gonçalves Dias de Souza: Writing—Revision & Editing; Angelo Pallini: Writing—Revision & Editing; Grasiele Soares Cavallini: Conceptualization, Supervision, Wrinting—Revision & Editing.

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Correspondence to T. D. Carlos.

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The authors have no relevant financial or non-financial interests to disclose.

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Editorial responsibility: Samareh Mirkia.

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Carlos, T.D., de Souza, N.L.G.D., Pallini, A. et al. Paint effluent treatment through the fenton-type coagulation process with peracetic acid and iron ions. Int. J. Environ. Sci. Technol. (2024). https://doi.org/10.1007/s13762-024-05645-1

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  • DOI: https://doi.org/10.1007/s13762-024-05645-1

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