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

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorBatista, Ana Paula S.
dc.creatorPupo Nogueira, Raquel F.
dc.date2014-05-20T14:19:13Z
dc.date2016-10-25T17:40:57Z
dc.date2014-05-20T14:19:13Z
dc.date2016-10-25T17:40:57Z
dc.date2012-03-15
dc.date.accessioned2017-04-05T22:30:38Z
dc.date.available2017-04-05T22:30:38Z
dc.identifierJournal of Photochemistry and Photobiology A-chemistry. Lausanne: Elsevier B.V. Sa, v. 232, p. 8-13, 2012.
dc.identifier1010-6030
dc.identifierhttp://hdl.handle.net/11449/25796
dc.identifierhttp://acervodigital.unesp.br/handle/11449/25796
dc.identifier10.1016/j.jphotochem.2012.01.016
dc.identifierWOS:000302845600002
dc.identifierhttp://dx.doi.org/10.1016/j.jphotochem.2012.01.016
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/870635
dc.descriptionThe 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.
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.languageeng
dc.publisherElsevier B.V. Sa
dc.relationJournal of Photochemistry and Photobiology A: Chemistry
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectFe(III)-oxalate
dc.subjectSulfonamide
dc.subjectSubstituent effect
dc.subjectPhoto-Fenton
dc.titleParameters affecting sulfonamide photo-Fenton degradation - Iron complexation and substituent group
dc.typeOtro


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