Lability of heavy metal species in aquatic humic substances characterized by ion exchange with cellulose phosphate

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dc.contributor.authorRocha, J. C.
dc.contributor.authorToscano, IAS
dc.contributor.authorBurba, P.
dc.contributor.institutionINST SPECTROCHEM & APPL SPECT
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:27:02Z
dc.date.available2014-05-20T15:27:02Z
dc.date.issued1997-01-01
dc.description.abstractLabile metal species in aquatic humic substances (HSs) were characterized by ion exchange on cellulose phosphate (CellPhos) by applying an optimized batch procedure. The HSs investigated were pre-extracted from humic-rich waters by ultrafiltration and a resin XAD 8 procedure. The HS-metal species studied were formed by complexation with Cd(II), Ni(II), Cu(II), Mn(II) and Pb(II) as a function of time and the ratio ions to HSs. The kinetics and reaction order of this exchange process were studied. At the beginning (<3 min), the labile metal fractions are separated relatively quickly. After 3 min, the separation of the metal ions proceeds with uniform half-lives of about 12-14 min, revealing rather slow first-order kinetics. The metal exchange between HSs and CellPhos exhibited the following order of metal lability with the studied HSs: Cu > Pb > Mn > Ni > Cd. The required metal determinations were carried out by atomic absorption spectrometry.en
dc.description.affiliationINST SPECTROCHEM & APPL SPECT,D-44139 DORTMUND,GERMANY
dc.format.extent69-74
dc.identifierhttp://dx.doi.org/10.1016/S0039-9140(96)02017-6
dc.identifier.citationTalanta. Amsterdam: Elsevier B.V., v. 44, n. 1, p. 69-74, 1997.
dc.identifier.doi10.1016/S0039-9140(96)02017-6
dc.identifier.issn0039-9140
dc.identifier.urihttp://hdl.handle.net/11449/37088
dc.identifier.wosWOS:A1997VW14200009
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofTalanta
dc.relation.ispartofjcr4.244
dc.relation.ispartofsjr1,186
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectaquatic humic substancespt
dc.subjectcellulose phosphatept
dc.subjectheavy metal speciespt
dc.subjection exchangept
dc.subjectlabilitypt
dc.titleLability of heavy metal species in aquatic humic substances characterized by ion exchange with cellulose phosphateen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.

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