Optimizing conditions for chromium-mediated photo-Fenton-like reactions using design of experiments

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUNSL-CONICET-
Autor(es): dc.contributorNational University of San Luis (UNSL)-
Autor(es): dc.contributorNational University of San Luis-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorDel Pópolo Grzona, Mariana-
Autor(es): dc.creatorOrden, Alejandro A.-
Autor(es): dc.creatorLima, Karla V. Leite-
Autor(es): dc.creatorDe Jesus, Jany H. Ferreira-
Autor(es): dc.creatorLeporati, Jorge L.-
Autor(es): dc.creatorPupo Nogueira, Raquel F.-
Autor(es): dc.creatorBarbero, Bibiana P.-
Data de aceite: dc.date.accessioned2025-08-21T15:42:04Z-
Data de disponibilização: dc.date.available2025-08-21T15:42:04Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2025-02-14-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.ces.2024.121167-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/304617-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/304617-
Descrição: dc.descriptionThis study aims to utilize the chromium present in tannery wastewaters as a catalyst of photo-Fenton-like reaction. Gallic acid (GA), a monomer of tannic acid, was chosen as a model compound due to its recalcitrance and toxicity. A 2k factorial design followed by a central composite design was applied to evaluate the effects of H2O2 and Cr(III) concentrations, and pH on total organic carbon (TOC) removal. Statistical analysis showed all variables significantly influenced TOC removal, developing a second-order polynomial model (R2 = 0.8502, Radj2 = 0.7967, F-value = 15.89, p-value < 0.0001, lack of fit = 0.24). The most favorable conditions were [H2O2] > 35 mM, [Cr(III)] > 130 mg L−1, and pH 6.5–7.0, achieving up to 26 % TOC removal in 120 min. UV–vis and LC-MS confirmed GA degradation; although, the byproducts generated would be very recalcitrant or would inhibit the catalytic action of Cr(III), limiting the TOC removal.-
Descrição: dc.descriptionChemical Technology Research Institute (INTEQUI) UNSL-CONICET, Almirante Brown 1455-
Descrição: dc.descriptionFaculty of Engineering and Agricultural Sciences (FICA) National University of San Luis (UNSL), Ruta 55 Extremo Norte-
Descrição: dc.descriptionDepartment of Chemistry Faculty of Chemistry Biochemistry and Pharmacy (FQByF) National University of San Luis, Ejército de los Andes 950-
Descrição: dc.descriptionSão Paulo State University (UNESP) Institute of Chemistry, SP-
Descrição: dc.descriptionSão Paulo State University (UNESP) Institute of Chemistry, SP-
Idioma: dc.languageen-
Relação: dc.relationChemical Engineering Science-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectCentral composite design-
Palavras-chave: dc.subjectCr(III)-photo-Fenton-like reaction-
Palavras-chave: dc.subjectFull factorial design-
Palavras-chave: dc.subjectGallic acid degradation-
Palavras-chave: dc.subjectResponse surface methodology-
Título: dc.titleOptimizing conditions for chromium-mediated photo-Fenton-like reactions using design of experiments-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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