Parameters affecting sulfonamide photo-Fenton degradation - Iron complexation and substituent group

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dc.contributor.authorBatista, Ana Paula S. [UNESP]
dc.contributor.authorPupo Nogueira, Raquel F. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T14:19:13Z
dc.date.available2014-05-20T14:19:13Z
dc.date.issued2012-03-15
dc.description.abstractThe photo-Fenton degradation of the sulfonamide antibiotics sulfadiazine (SDZ) and sulfathiazole (STZ) mediated by Fe(III)-oxalate was studied in this work. The influence of iron complexation. H2O2 concentration and pH on the initial SDZ and STZ degradation rate was evaluated. Degradation of both antibiotics is drastically improved in the presence of Fe(III)-oxalate in comparison to free iron, achieving complete degradation after 8 min irradiation at pH 2.5 in the presence of 5 mM H2O2 (equivalent to H2O2/antibiotic = 50). It was also possible to extend pH range of the photo-Fenton reaction by the use of Fe(III)-oxalate reaching more the 70% degradation at pH 6, however without significant mineralization. Comparison of the degradation kinetics of both sulfonamides indicated higher recalcitrance of STZ due to the lower electron density of its thiazol ring in relation to pyrimidine ring in SDZ. (C) 2012 Elsevier B.V. All rights reserved.en
dc.description.affiliationUNESP Univ Estadual Paulista, Inst Quim Araraquara, BR-14801970 Araraquara, SP, Brazil
dc.description.affiliationUnespUNESP Univ Estadual Paulista, Inst Quim Araraquara, BR-14801970 Araraquara, SP, Brazil
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.identifierhttp://dx.doi.org/10.1016/j.jphotochem.2012.01.016
dc.identifier.citationJournal of Photochemistry and Photobiology A-chemistry. Lausanne: Elsevier B.V. Sa, v. 232, p. 8-13, 2012.
dc.identifier.doi10.1016/j.jphotochem.2012.01.016
dc.identifier.issn1010-6030
dc.identifier.urihttp://hdl.handle.net/11449/25796
dc.identifier.wosWOS:000302845600002
dc.language.isoeng
dc.publisherElsevier B.V. Sa
dc.relation.ispartofJournal of Photochemistry and Photobiology A: Chemistry
dc.relation.ispartofjcr2.891
dc.relation.ispartofsjr0,689
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectFe(III)-oxalateen
dc.subjectSulfonamideen
dc.subjectSubstituent effecten
dc.subjectPhoto-Fentonen
dc.titleParameters affecting sulfonamide photo-Fenton degradation - Iron complexation and substituent groupen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V. Sa
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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