Studies on the adsorption and kinetics of photodegradation of a model compound for heterogeneous photocatalysis onto TiO2

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dc.contributor.authorValente, Jose Pedro S.
dc.contributor.authorPadilha, Pedro M.
dc.contributor.authorFlorentino, Ariovaldo O.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:53:20Z
dc.date.available2014-05-20T13:53:20Z
dc.date.issued2006-08-01
dc.description.abstractAn investigation was made on the adsorption and kinetics of photodegradation of potassium hydrogenphthalate in an aqueous suspension of TiO2. Two models, Langmuir and Freundlich, were used to describe the adsorption process and the model proposed by Langmuir-Hinshelwood (L-H) was employed to describe the kinetics of the photodecomposition reactions of hydrogenphthalate. The results of the adsorptions were fitted to the models proposed by Langmuir and Freundlich. Adsorption was found to be a function of the temperature, with adsorption capacity increasing from 2.4 to 4.5 mg/g when the temperature rose from 20 to 30 degrees C. The kinetic model indicates that the rate constant, k, of the first order reaction, is high in the 10.0 to 100 mg/l interval, which is coherent with the low value of the adsorption constant, K. The results fitted to the L-H model led to an equation that, within the range of concentrations studied here, theoretically allows one to evaluate the photodegradation rate. (c) 2005 Elsevier Ltd. All rights reserved.en
dc.description.affiliationUniv Estadual Paulista Julio Mesquita Filho, IB, Dept Chem & Biochem, BR-18618000 Botucatu, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista Julio Mesquita Filho, IB, Dept Chem & Biochem, BR-18618000 Botucatu, SP, Brazil
dc.format.extent1128-1133
dc.identifierhttp://dx.doi.org/10.1016/j.chemosphere.2005.11.050
dc.identifier.citationChemosphere. Oxford: Pergamon-Elsevier B.V., v. 64, n. 7, p. 1128-1133, 2006.
dc.identifier.doi10.1016/j.chemosphere.2005.11.050
dc.identifier.issn0045-6535
dc.identifier.lattes6981448637456391
dc.identifier.orcid0000-0003-4179-0574
dc.identifier.urihttp://hdl.handle.net/11449/19034
dc.identifier.wosWOS:000240157100010
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofChemosphere
dc.relation.ispartofjcr4.427
dc.relation.ispartofsjr1,435
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectpotassium hydrogenphthalatept
dc.subjectTiO2pt
dc.subjectadsorption-kineticspt
dc.subjectLangmuirpt
dc.subjectFreundlichpt
dc.subjectLangmuir-Hinshelwoodpt
dc.titleStudies on the adsorption and kinetics of photodegradation of a model compound for heterogeneous photocatalysis onto TiO2en
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes6981448637456391[2]
unesp.author.orcid0000-0003-4179-0574[2]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências, Botucatupt

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