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dc.contributor.authorPedrobom, Jorge Henrique [UNESP]
dc.contributor.authorEismann, Carlos Eduardo [UNESP]
dc.contributor.authorMenegário, Amauri A. [UNESP]
dc.contributor.authorGalhardi, Juliana Aparecida [UNESP]
dc.contributor.authorLuko, Karen Silva [UNESP]
dc.contributor.authorDourado, Thiago de Araujo [UNESP]
dc.contributor.authorKiang, Chang Hung [UNESP]
dc.date.accessioned2018-12-11T17:07:58Z
dc.date.available2018-12-11T17:07:58Z
dc.date.issued2017-02-01
dc.identifierhttp://dx.doi.org/10.1016/j.chemosphere.2016.11.082
dc.identifier.citationChemosphere, v. 169, p. 249-256.
dc.identifier.issn1879-1298
dc.identifier.issn0045-6535
dc.identifier.urihttp://hdl.handle.net/11449/173832
dc.description.abstractThe exchange membranes P81 and DE81 and Chelex-100 resin were used to perform in situ speciation of uranium in treated acid mine drainage at the Osamu Utsumi mining site, Poços de Caldas city, Southeast Brazil. To investigate possible chemical modifications in the samples during analysis, the three ligands were deployed in situ and in a laboratory (in lab). The results obtained in situ were also compared to a speciation performed using Visual MINTEQ software. Chelex-100 retained total labile U for a period of up to 48 h. The labile U fraction determined by Chelex 100 ranged from 107 ± 6% to 147 ± 44% in situ and from 115 ± 22% to 191 ± 5% in lab. DE81 retained anionic U species up to 8 h, with labile fractions ranging from 37 ± 2% to 76 ± 3% in situ and 34 ± 12% to 180 ± 17% in lab. P81 exhibited a lower efficiency in retaining U species, with concentrations ranging from 6± 2% to 19± 2% in situ and 3± 2% to 18± 2% in lab. The speciation obtained from MINTEQ suggests that the major U species were UO2OH+, UO2(OH)3−, UO2(OH)2(aq), Ca2UO2(CO3)3(aq), CaUO2(CO3)3 2−, UO2(CO3)2 2−, and UO2(CO3)3 4−. This result is in accordance with the results obtained in situ. Differences concerning speciation and the total and soluble U concentrations were observed between the deployments performed in situ and in the laboratory, indicating that U speciation must be performed in situ.en
dc.format.extent249-256
dc.language.isoeng
dc.relation.ispartofChemosphere
dc.sourceScopus
dc.subjectIn situ
dc.subjectMultiple DGT devices
dc.subjectSpeciation
dc.subjectTreated acid mine drainage
dc.subjectUranium
dc.titleIn situ speciation of uranium in treated acid mine drainage using the diffusion gradients in thin films technique (DGT)en
dc.typeArtigo
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.description.affiliationCentro de Estudos Ambientais - CEA UNESP - Univ Estadual Paulista, Avenida 24-A, 1515
dc.description.affiliationLaboratório de Estudos de Bacias - LEBAC Instituto de Geociências e Ciências Exatas - IGCE UNESP - Univ Estadual Paulista, Avenida 24-A, 1515
dc.description.affiliationUnespCentro de Estudos Ambientais - CEA UNESP - Univ Estadual Paulista, Avenida 24-A, 1515
dc.description.affiliationUnespLaboratório de Estudos de Bacias - LEBAC Instituto de Geociências e Ciências Exatas - IGCE UNESP - Univ Estadual Paulista, Avenida 24-A, 1515
dc.identifier.doi10.1016/j.chemosphere.2016.11.082
dc.rights.accessRightsAcesso aberto
dc.identifier.scopus2-s2.0-84997294962
dc.identifier.file2-s2.0-84997294962.pdf
dc.relation.ispartofsjr1,435
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