Synthesis, characterization, and application of modified silica in the removal and preconcentration of lead ions from natural river water

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dc.contributor.authorFerreira, Guilherme [UNESP]
dc.contributor.authorCaetano, Laercio [UNESP]
dc.contributor.authorCastro, Renata S. D. [UNESP]
dc.contributor.authorPadilha, Pedro Magalhaes [UNESP]
dc.contributor.authorCastro, Gustavo Rocha [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:29:51Z
dc.date.available2014-05-20T13:29:51Z
dc.date.issued2011-04-01
dc.description.abstractThis paper describes the synthesis, modification, and application of modified silica for the removal of lead ions from aqueous medium. The modification reaction provided a reduction in surface are from 737 to 399 m(2) g(-1), which was attributed to the 4-amine-2-mercaptopyrimidine molecule attachment onto its surface. The characterization through FTIR spectra demonstrated bands at 3347 cm(-1) assigned to N-H stretching vibrations and the absence of thiol bands at 2600 e 2547 cm(-1) at Si-mod spectrum is an indicative that the attachment occurred via SH groups. The linearization of adsorption isotherm data through the modified Langmuir equation resulted in a maximum adsorption capacity of 2.9 mu mol g(-1). The material was applied in a continuous flow system in the preconcentration of water samples from Parana River and the results were in agreement with metal concentration determined directly through atomic absorption spectrometry with graphite furnace. The method validation was performed through analysis of water standard reference material (1643e), which also presented a 7.2-fold enrichment factor.en
dc.description.affiliationUniv Estadual Paulista, IB UNESP, Dept Quim & Bioquim, BR-18618000 Botucatu, SP, Brazil
dc.description.affiliationUniv Estadual Paulista, Dept Fis & Quim, FEIS UNESP, BR-15385000 Ilha Solteira, SP, Brazil
dc.description.affiliationUniv Estadual Paulista, Dept Fitotecnia Tecnol Alimentos & Socio Econ, FEIS UNESP, BR-15385000 Ilha Solteira, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, IB UNESP, Dept Quim & Bioquim, BR-18618000 Botucatu, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Dept Fis & Quim, FEIS UNESP, BR-15385000 Ilha Solteira, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Dept Fitotecnia Tecnol Alimentos & Socio Econ, FEIS UNESP, BR-15385000 Ilha Solteira, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIdFAPESP: 06/54946-9
dc.description.sponsorshipIdCNPq: 136936/2008-3
dc.format.extent397-402
dc.identifierhttp://dx.doi.org/10.1007/s10098-010-0322-4
dc.identifier.citationClean Technologies and Environmental Policy. New York: Springer, v. 13, n. 2, p. 397-402, 2011.
dc.identifier.doi10.1007/s10098-010-0322-4
dc.identifier.issn1618-954X
dc.identifier.lattes6981448637456391
dc.identifier.orcid0000-0003-4179-0574
dc.identifier.urihttp://hdl.handle.net/11449/10116
dc.identifier.wosWOS:000288549400014
dc.language.isoeng
dc.publisherSpringer
dc.relation.ispartofClean Technologies and Environmental Policy
dc.relation.ispartofjcr2.337
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectLead ionsen
dc.subjectWateren
dc.subjectSolid phase extractionen
dc.subjectModified silicaen
dc.titleSynthesis, characterization, and application of modified silica in the removal and preconcentration of lead ions from natural river wateren
dc.typeArtigo
dcterms.licensehttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0
dcterms.rightsHolderSpringer
unesp.author.lattes6981448637456391[4]
unesp.author.orcid0000-0003-4179-0574[4]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências, Botucatupt
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Engenharia, Ilha Solteirapt
unesp.departmentFitotecnia, Tecnologia de Alimentos e Socioeconomia - FEISpt
unesp.departmentFísica e Química - FEISpt

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Artigos - Química e Bioquímica - IBB
Ilha Solteira - FEIS - Faculdade de Engenharia