Adsorption of transition-metal ions in ethanol solution by a nanomaterial based on modified silsesquioxane

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dc.contributor.authorDias Filho, Newton Luiz [UNESP]
dc.contributor.authorCosta, Reginaldo Mendonca [UNESP]
dc.contributor.authorMarangoni, Fabiane [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:29:49Z
dc.date.available2014-05-20T13:29:49Z
dc.date.issued2008-03-20
dc.description.abstractThe material octakis[3-(3-amino- 1,2,4-triazole)propyl]octasilsesquioxane (ATZ-SSQ) was synthesized and its potential was assessed for Cu(II), Ni(II), Co(II), Zn(II) and Fe(III) from their ethanol solutions and compared with related 3-amino-1,2,4-triazole-propyl modified silica gel (ATZ-SG). The adsorption was performed using a batchwise process and both organofunctionalized surfaces showed the ability to adsorb the metal ions from ethanol solution. The Langmuir model allowed to describe the sorption of the metal ions on ATZ-SSQ and ATTZ-SG in a satisfactory way. The equilibrium is reached very quickly Q min) for ATZ-SSQ, indicating that the adsorption sites are well exposed. The maximum metal ion uptake values for Cu(II), Co(II), Zn(II), Ni(II) and Fe(III) were 0.86, 0.09, 0.19, 0.09 and 0.10 mmol g(-1), respectively, for the ATZ-SSQ, which were higher than the corresponding values 0.21, 0.04, 0.14, 0.05 and 0.07 mmol g(-1) achieved with the ATZ-SG. In order to obtain more information on the metal-ligand interaction of the complexes on the surface of the ATZ-SSQ, Cu(II) was used as a probe to determine the arrangements of the ligands around the central metal ion by electron spin resonance (ESR). The ATZ-SSQ was used for the separation and determination (in flow using a column technique) of the metal ions present in commercial ethanol. (c) 2008 Elsevier B.V. All rights reserved.en
dc.description.affiliationUNESP, Dept Fis & Quim, BR-15385 Ilha Solteira, SP, Brazil
dc.description.affiliationUnespUNESP, Dept Fis & Quim, BR-15385 Ilha Solteira, SP, Brazil
dc.format.extent625-635
dc.identifierhttp://dx.doi.org/10.1016/j.colsurfa.2007.11.050
dc.identifier.citationColloids and Surfaces A-physicochemical and Engineering Aspects. Amsterdam: Elsevier B.V., v. 317, n. 1-3, p. 625-635, 2008.
dc.identifier.doi10.1016/j.colsurfa.2007.11.050
dc.identifier.issn0927-7757
dc.identifier.lattes1509480515046572
dc.identifier.urihttp://hdl.handle.net/11449/10098
dc.identifier.wosWOS:000254267700083
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofColloids and Surfaces A: Physicochemical and Engineering Aspects
dc.relation.ispartofjcr2.829
dc.relation.ispartofsjr0,753
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectsilsesquioxaneen
dc.subjectsilica gelen
dc.subjectadsorptionen
dc.subjectisotherms of adsorptionen
dc.subjecttransition-metal ionsen
dc.titleAdsorption of transition-metal ions in ethanol solution by a nanomaterial based on modified silsesquioxaneen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes1509480515046572
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Engenharia, Ilha Solteirapt

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Artigos - Física e Química - FEIS