Approach combining on-line metal exchange and tangential-flow ultrafiltration for in-situ characterization of metal species in humic hydrocolloids.

Simple item page
dc.contributor.authorGoveia, Danielle
dc.contributor.authorLobo, Fabiana Aparecida
dc.contributor.authorBurba, Peter
dc.contributor.authorFraceto, Leonardo Fernandes
dc.contributor.authorDias Filho, Newton Luiz
dc.contributor.authorRosa, André Henrique
dc.date.accessioned2017-05-25T12:32:31Z
dc.date.available2017-05-25T12:32:31Z
dc.date.issued2010
dc.description.abstractThis paper deals with the development and optimization of an analytical procedure using ultrafiltration and a flow-injection system, and its application in in-situ experiments to characterize the lability and availability of metal species in humic-rich hydrocolloids. The on-line system consists of a tangential flow ultrafiltration device equipped with a 3-kDa filtration membrane. The concentration of free ions in the filtrate was determined by atomic-absorption spectrometry, assuming that metals not complexed by aquatic humic substances (AHS) were separated from the complexed species (M–AHS) retained by the membrane. For optimization, exchange experiments using Cu(II) solutions and AHS solutions doped with the metal ions Ni(II),Mn(II), Fe(III), Cd (II), and Zn(II) were carried out to characterize the stability of the metal–AHS complexes. The new procedure was then applied in-situ at a tributary of the Ribeira do Iguape river (Iguape, São Paulo State, Brazil) and evaluated using the ions Fe(III) and Mn(II), which are considered to be essential constituents of aquatic systems. From the exchange between metal–natural organic matter (M–NOM) and the Cu(II) ions it was concluded that Cu(II) concentrations >485 μg L−1 were necessary to obtain maximum exchange of the complexes Mn–NOM and Fe–NOM, corresponding to 100% Mn and 8% Fe. Moreover, the new analytical procedure is simple and opens up new perspectives for understanding the complexation, transport, stability, and lability of metal species in humic-rich aquatic environments.pt_BR
dc.identifier.citationGOVEIA, D. et al. Approach combining on-line metal exchange and tangential-flow ultrafiltration for in-situ characterization of metal species in humic hydrocolloids. Analytical and Bioanalytical Chemistry, v. 397, p. 851-860, 2010. Disponível em: <https://link.springer.com/article/10.1007%2Fs00216-010-3547-5>. Acesso em: 20 abr. 2017.pt_BR
dc.identifier.doihttps://doi.org/10.1007/s00216-010-3547-5
dc.identifier.issn1618-2650
dc.identifier.urihttp://www.repositorio.ufop.br/handle/123456789/7803
dc.identifier.uri2https://link.springer.com/article/10.1007%2Fs00216-010-3547-5pt_BR
dc.language.isoen_USpt_BR
dc.rightsrestritopt_BR
dc.subjectLability/availabilitypt_BR
dc.subjectMetalpt_BR
dc.subjectAquatic humic substancespt_BR
dc.subjectUltrafiltrationpt_BR
dc.titleApproach combining on-line metal exchange and tangential-flow ultrafiltration for in-situ characterization of metal species in humic hydrocolloids.pt_BR
dc.typeArtigo publicado em periodicopt_BR
Files
Collections
DEQUI - Artigos publicados em periódicos