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dc.contributor.authorTehrani, Marjan H.
dc.contributor.authorCompanys Ferran, Encarnació
dc.contributor.authorDago Busquets, Àngela
dc.contributor.authorPuy Llorens, Jaume
dc.contributor.authorGalceran i Nogués, Josep
dc.date.accessioned2018-09-14T08:27:40Z
dc.date.available2019-09-01T22:17:06Z
dc.date.issued2018
dc.identifier.issn0048-9697
dc.identifier.urihttp://hdl.handle.net/10459.1/64710
dc.description.abstractIndium is increasingly used in electronic devices, from which it can be mobilized towards environmental compartments. Speciation of In in waters is important for its direct ecotoxicological effects, as well as for the fate of this element in the environment (e.g. fluxes from or towards sediments). Free indium concentrations in the environment can be extremely low due to hydrolysis, especially important in trivalent cations, to precipitation and to complexation with different ligands. In this work, the free indium concentration (which is a toxicologically and geochemically relevant fraction) in aqueous solutions at pH 3 has been measured with an adapted version of the electroanalytical technique AGNES (Absence of Gradients and Nernstian Equilibrium Stripping). Speciation measurements in mixtures of indium with the ligands NTA (nitrilotriacetic acid) and oxalate indicate that the values of their stability constants in the NIST46.6 database are less adequate than those published in some more recent literature. The extraordinary lability and mobility of In-oxalate complexes allow the measuring of free indium concentrations below nanomol/liter in just 25 s of deposition time.
dc.description.sponsorshipThe authors gratefully acknowledge support for this research from the Spanish Ministry MINECO (Projects CTM2013-48967 and CTM2016-78798). MHT acknowledges the Generalitat of Catalonia for a Ph.D. grant (FI AGAUR).
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherElsevier
dc.relationMINECO/PN2013-2016/CTM2013-48967
dc.relationMINECO/PN2013-2016/CTM2016-78798
dc.relation.isformatofVersió postprint del document publicat a: https://doi.org/10.1016/j.scitotenv.2017.08.200
dc.relation.ispartofScience of the Total Environment, 2018, vol. 612, p. 269-275
dc.rightscc-by-nc-nd (c) Elsevier, 2017
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectBioavailability
dc.subjectSpeciation
dc.subjectIn(III)
dc.subjectComplexation
dc.titleFree indium concentration determined with AGNES
dc.typeinfo:eu-repo/semantics/article
dc.date.updated2018-09-14T08:27:40Z
dc.identifier.idgrec026110
dc.type.versioninfo:eu-repo/semantics/acceptedVersion
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.identifier.doihttps://doi.org/10.1016/j.scitotenv.2017.08.200


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cc-by-nc-nd (c) Elsevier, 2017
Except where otherwise noted, this item's license is described as cc-by-nc-nd (c) Elsevier, 2017