Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/63055
Full metadata record
DC FieldValueLanguage
dc.contributor.CRUESPUniversidade Estadual de Campinaspt_BR
dc.typeArtigo de periódicopt_BR
dc.titleChemisorption of Cu-II and Co-II chlorides and beta-diketonates on silica gel functionalized with 3-aminopropyltrimethoxysilanept_BR
dc.contributor.authorEspinola, JGPpt_BR
dc.contributor.authorOliveira, SFpt_BR
dc.contributor.authorLemus, WESpt_BR
dc.contributor.authorSouza, AGpt_BR
dc.contributor.authorAiroldi, Cpt_BR
dc.contributor.authorMoreira, JCApt_BR
unicamp.authorUniv Fed Paraiba, CCEN, Dept Quim, BR-58059900 Joao Pessoa, Paraiba, Brazil Univ Estadual Campinas, Inst Quim, BR-13083970 Campinas, SP, Brazilpt_BR
dc.subjectCu-II chloridespt_BR
dc.subjectCo-II chloridespt_BR
dc.subjectbeta-diketonatespt_BR
dc.subject.wosDivalent-cationspt_BR
dc.subject.wosAdsorptionpt_BR
dc.subject.wosIsothermpt_BR
dc.subject.wosSurfacept_BR
dc.description.abstractSilica gel chemically modified with the silylating agent 3-aminopropyltrimethoxysilane (SAPS) adsorbs Cu-II and Co-II in the form of chlorides, acetylacetonates and dipivaloylmethanoates from ethanolic solution. The profiles of the chemisorption isotherms present good correlation with the proposed Langmuir model. The amount of adsorbed species in these chemisorption processes showed that only a fraction of the number of active sites was effectively used by beta-diketonates, in comparison with the total available number disposed on the matrix. Based on the equilibrium constant the selectivity of the SAPS matrix with beta-diketonates, follows the order Co-II>Cu-II. The chelate of dipivaloylmethanoate with Co-II is more pronounced adsorbed on the surface than the correspondent complex of Cu-II. This fact reveals the possibility of separating both complexes by using this functionalized silica gel surface. However, for chlorides, this modified surface has preference for both cations. (C) 2000 Elsevier Science B.V. All rights reserved.pt
dc.relation.ispartofColloids And Surfaces A-physicochemical And Engineering Aspectspt_BR
dc.relation.ispartofabbreviationColloid Surf. A-Physicochem. Eng. Asp.pt_BR
dc.publisher.cityAmsterdampt_BR
dc.publisher.countryHolandapt_BR
dc.publisherElsevier Science Bvpt_BR
dc.date.issued2000pt_BR
dc.date.monthofcirculation42156pt_BR
dc.identifier.citationColloids And Surfaces A-physicochemical And Engineering Aspects. Elsevier Science Bv, v. 166, n. 41699, n. 45, n. 50, 2000.pt_BR
dc.language.isoenpt_BR
dc.description.volume166pt_BR
dc.description.issuenumber41699pt_BR
dc.description.firstpage45pt_BR
dc.description.lastpage50pt_BR
dc.rightsfechadopt_BR
dc.rights.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policypt_BR
dc.sourceWeb of Sciencept_BR
dc.identifier.issn0927-7757pt_BR
dc.identifier.wosidWOS:000085981700005pt_BR
dc.identifier.doi10.1016/S0927-7757(99)00493-8pt_BR
dc.date.available2014-12-02T16:27:53Z
dc.date.available2015-11-26T16:12:21Z-
dc.date.accessioned2014-12-02T16:27:53Z
dc.date.accessioned2015-11-26T16:12:21Z-
dc.description.provenanceMade available in DSpace on 2014-12-02T16:27:53Z (GMT). No. of bitstreams: 1 WOS000085981700005.pdf: 98722 bytes, checksum: d8a8651a1b158fcfbdbf62fa33354855 (MD5) Previous issue date: 2000en
dc.description.provenanceMade available in DSpace on 2015-11-26T16:12:21Z (GMT). No. of bitstreams: 2 WOS000085981700005.pdf: 98722 bytes, checksum: d8a8651a1b158fcfbdbf62fa33354855 (MD5) WOS000085981700005.pdf.txt: 16715 bytes, checksum: c7514859fd91a5eb438098648bd62b97 (MD5) Previous issue date: 2000en
dc.identifier.urihttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/63055pt_BR
dc.identifier.urihttp://www.repositorio.unicamp.br/handle/REPOSIP/63055
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/63055-
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File Description SizeFormat 
WOS000085981700005.pdf96.41 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.