Relative lability of trace metals complexed in aquatic humic substances using ion-exchanger cellulose-hyphan

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dc.contributor.authorRocha, Julio Cesar [UNESP]
dc.contributor.authorToscano, Ilda A. S. [UNESP]
dc.contributor.authorCardoso, Arnaldo Alves [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:18:18Z
dc.date.available2014-05-27T11:18:18Z
dc.date.issued1997-12-01
dc.description.abstractThe purpose of this paper is to characterize the lability/inertness metal fractions complexed by aquatic humic substances (HS) in relation to pH, complexation time, and HS concentration. HS were preconcentrated by ultrafiltration and complexed with bivalent metal ions. These fractions were characterized by ion exchange with the chelating collector cellulose Hyphan by applying batch procedure. The metals were determined by atomic absorption spectrometry. The results show that the distribution coefficients, Kd, decreased with HS presence, and that the relative lability of metal fractions complexed by HS is dependent on variables such as pH, complexation time, and HS concentration. Until c.a. 15 min, the metal change between aquatic HS and ion exchanger occurs following a 2 order reaction. Afterwards, the remaining metal fraction in the HS reacts following a 1st order reaction. For traces of metal ions bound to dissolved HS, the lability orderPb > Mn > Cd, Ni > Cu is revealed. ©1997 Soc. Bras. Química.en
dc.description.affiliationDepto. de Quim. Analítica Inst. de Quim. de Araraquara- UNESP, C.P. 355, 14800-900 Araraquara - SP
dc.description.affiliationUnespDepto. de Quim. Analítica Inst. de Quim. de Araraquara- UNESP, C.P. 355, 14800-900 Araraquara - SP
dc.format.extent239-243
dc.identifierhttp://dx.doi.org/10.1590/S0103-50531997000300010
dc.identifier.citationJournal of the Brazilian Chemical Society, v. 8, n. 3, p. 239-243, 1997.
dc.identifier.doi10.1590/S0103-50531997000300010
dc.identifier.file2-s2.0-18844445144.pdf
dc.identifier.issn0103-5053
dc.identifier.lattes4148837403618207
dc.identifier.lattes9165109840414837
dc.identifier.scieloS0103-50531997000300010
dc.identifier.scopus2-s2.0-18844445144
dc.identifier.urihttp://hdl.handle.net/11449/65294
dc.identifier.wosWOS:A1997XG43500010
dc.language.isoeng
dc.relation.ispartofJournal of the Brazilian Chemical Society
dc.relation.ispartofjcr1.444
dc.relation.ispartofsjr0,357
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectAquatic humic substances
dc.subjectIon-exchange
dc.subjectMetal complexation
dc.titleRelative lability of trace metals complexed in aquatic humic substances using ion-exchanger cellulose-hyphanen
dc.typeArtigo
dcterms.licensehttp://www.scielo.br/revistas/jbchs/iaboutj.htm
unesp.author.lattes4148837403618207
unesp.author.lattes9165109840414837[3]
unesp.author.orcid0000-0003-2046-995X[3]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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