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dc.contributor.authorVera, Ruben
dc.contributor.authorFontàs, Claudia
dc.contributor.authorGalceran i Nogués, Josep
dc.contributor.authorSerra, Olga
dc.contributor.authorAnticó, Enriqueta
dc.date.accessioned2018-10-30T11:55:13Z
dc.date.available2019-12-13T23:13:06Z
dc.date.issued2018
dc.identifier.issn0048-9697
dc.identifier.urihttp://hdl.handle.net/10459.1/65005
dc.description.abstractMetal speciation studies can be performed with a new technique based on a functionalized membrane. The estimation of not only the total amount of metal, but also the metal available to living organisms is very important. In this context, we have investigated the use of a polymer inclusion membrane (PIM) in a new tool for the determination of free metal ion concentration. In order to check the usefulness of PIM devices in metal speciation studies and metal availability to potato plants (Solanum tuberosum), Zn has been chosen as a case study. The PIM designed for Zn transport uses polyvinyl chloride (PVC) as polymer and di-(2-ethylhexyl) phosphoric acid (D2EHPA) as carrier, with 0.01M nitric acid in the receiving solution. The stability of the PIM has been demonstrated and good linearity of PIM-device fluxes (JPIM) with free metal concentration was observed for total metal concentrations ranging from 3 µM up to 70 µM. The presence of different ligands, such as ethylenediaminetetraacetic acid (EDTA), humic acid (HA) and citrate, greatly influences the measured JPIM because the formation of metal complexes in the donor phase decreases the free Zn concentration in the sample. Good correlation has been found when comparing PIM fluxes and metal accumulation in potato plants roots in the presence of EDTA. But, the root uptake did not change when adding citrate and HA to the hydroponic medium, so the uptake does not always follows the Free Ion Activity Model (FIAM). These ligands might induce physiological changes in the roots and enhance metal uptake.
dc.description.sponsorshipThe financial support of the Spanish government through research projects CTM2013-48967 and CTM2016-78798 (AEI/FEDER/UE) is acknowledged. R. Vera acknowledges a grant from Spanish Ministerio de Economía y Competitividad ref. BES-2014-068314.
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherElsevier
dc.relationMINECO/PN2013-2016/CTM2013-48967
dc.relationMINECO/PN2013-2016/CTM2016-78798
dc.relationMINECO/PN2013-2016/BES-2014-068314
dc.relation.isformatofVersió postprint del document publicat a: https://doi.org/10.1016/j.scitotenv.2017.11.316
dc.relation.ispartofScience of the Total Environment, 2018, vol. 622-623, p. 316-324
dc.rightscc-by-nc-nd (c) Elsevier, 2017
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectPolymer inclusion membranes (PIMs)
dc.subjectMetal speciation
dc.subjectDi-2-(ethylhexyl) phosphoric acid (D2EHPA)
dc.subjectZinc
dc.titlePolymer inclusion membrane to access Zn speciation: Comparison with root uptake
dc.typeinfo:eu-repo/semantics/article
dc.date.updated2018-10-30T11:55:13Z
dc.identifier.idgrec026548
dc.type.versioninfo:eu-repo/semantics/acceptedVersion
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.identifier.doihttps://doi.org/10.1016/j.scitotenv.2017.11.316


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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