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dc.contributor.authorMartins, Amanda E. [UNESP]
dc.contributor.authorPereira, Milene S. [UNESP]
dc.contributor.authorJorgetto, Alexandre O. [UNESP]
dc.contributor.authorMartines, Marco A.U.
dc.contributor.authorSilva, Rafael I.V. [UNESP]
dc.contributor.authorSaeki, Margarida J. [UNESP]
dc.contributor.authorCastro, Gustavo R. [UNESP]
dc.date.accessioned2014-05-27T11:29:48Z
dc.date.available2014-05-27T11:29:48Z
dc.date.issued2013-07-01
dc.identifierhttp://dx.doi.org/10.1016/j.apsusc.2013.02.096
dc.identifier.citationApplied Surface Science, v. 276, p. 24-30.
dc.identifier.issn0169-4332
dc.identifier.urihttp://hdl.handle.net/11449/75751
dc.description.abstractIn this study, a green adsorbent was successfully applied to remove toxic metals from aqueous solutions. Dried minced castor leaves were fractionated into 63-μm particles to perform characterization and extraction experiments. Absorption bands in FTIR (Fourier Transform Infrared Spectroscopy) spectra at 1544, 1232 and 1350 cm-1 were assigned to nitrogen-containing groups. Elemental analysis showed high nitrogen and sulfur content: 5.76 and 1.93%, respectively. The adsorption kinetics for Cd(II) and Pb(II) followed a pseudo-second-order model, and no difference between the experimental and calculated Nf values (0.094 and 0.05 mmol g-1 for Cd(II) and Pb(II), respectively) was observed. The Ns values calculated using the modified Langmuir equation, 0.340 and 0.327 mmol g-1 for Cd(II) and Pb(II), respectively, were superior to the results obtained for several materials in the literature. The method proposed in this study was applied to pre-concentrate (45-fold enrichment factor) and used to measure Cd(II) and Pb(II) in freshwater samples from the Paraná River. The method was validated through a comparative analysis with a standard reference material (1643e). © 2013 Elsevier B.V. © 2013 Elsevier B.V. All rights reserved.en
dc.format.extent24-30
dc.language.isoeng
dc.relation.ispartofApplied Surface Science
dc.sourceScopus
dc.subjectAdsorbent
dc.subjectAqueous samples
dc.subjectCastor leaf powder
dc.subjectChemisorption
dc.subjectMetals ions
dc.subjectAdsorption kinetics
dc.subjectComparative analysis
dc.subjectEnrichment factors
dc.subjectPseudo-second order model
dc.subjectReactive surfaces
dc.subjectStandard reference material
dc.subjectAdsorbents
dc.subjectFourier transform infrared spectroscopy
dc.subjectLead
dc.subjectNitrogen
dc.subjectPowder metals
dc.subjectAdsorption
dc.titleThe reactive surface of Castor leaf [Ricinus communis L.] powder as a green adsorbent for the removal of heavy metals from natural river wateren
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUniversidade Federal de Mato Grosso do Sul (UFMS)
dc.description.affiliationIB-UNESP Dept. Química e Bioquímica, C.P. 510, 18618-970 Botucatu, SP
dc.description.affiliationUFMS-Dept. Química, 79074-460 Campo Grande, MS
dc.description.affiliationUnespIB-UNESP Dept. Química e Bioquímica, C.P. 510, 18618-970 Botucatu, SP
dc.identifier.doi10.1016/j.apsusc.2013.02.096
dc.identifier.wosWOS:000322368100004
dc.rights.accessRightsAcesso restrito
dc.identifier.scopus2-s2.0-84877577504
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Biociências, Botucatupt
unesp.author.orcid0000-0002-5782-0590[3]
dc.relation.ispartofjcr4.439
dc.relation.ispartofsjr1,093
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