Back accumulation of diffusive gradients in thin-films devices with a stack of resin discs to assess availability of metal cations to biota in natural waters

dc.contributor.authorSans Duñó, Jordi
dc.contributor.authorCecilia Averós, Joan
dc.contributor.authorGalceran i Nogués, Josep
dc.contributor.authorPuy Llorens, Jaume
dc.contributor.authorBaeyens, Willy
dc.contributor.authorGao, Yue
dc.date.accessioned2023-06-26T11:51:51Z
dc.date.available2023-06-26T11:51:51Z
dc.date.issued2023
dc.description.abstractDetermining species, concentrations, and physicochemical parameters in natural waters is key to improve our understanding of the functioning of these ecosystems. Diffusive Gradients in Thin-films (DGT) devices with different thicknesses of the resin or of the diffusive disc can be used to collect independent information on relevant parameters. In particular, DGT devices with a stack of two resin discs offer a simple way to determine dissociation rate constants of metal complexes from the accumulation of the target metal in the back resin disc. In this work, simple approximate expressions for the determination of the dissociation rate constant are reported and applied to a model Ni nitrilotriacetic complex as well as to Zn complexes in the Mediterranean Osor stream. Once the physicochemical parameters are known, one can plot the labile fraction of the metal complexes in terms of the thickness of the diffusion domain. These plots reveal a strong dependence on the nature of complexes as well as on the characteristics of the diffusion domain, and they are of high interest as predictors of availability to biota whose uptake is limited by diffusion.
dc.description.sponsorshipSupport from the Ministry of Science and Innovation under projects PID2019-107033GB-C21 and PID2020-117910GB-C21 is acknowledged. J.S.-D acknowledges support from University of Lleida and VUB. We also thank C. David for the help in the picture of the resin disc included in the SI.
dc.identifier.doihttps://doi.org/10.1021/acs.est.3c00799
dc.identifier.issn0013-936X
dc.identifier.urihttps://repositori.udl.cat/handle/10459.1/463567
dc.language.isoeng
dc.publisherAmerican Chemical Society
dc.relationinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-107033GB-C21/CAPTADORES PASIVOS (DGT, DMT) Y TECNICAS ELECTROANALITICAS PARA ESPECIACION Y DISPONIBILIDAD EN AGUAS NATURALES Y SUELOS: MODELIZACION, DESARROLLO, APLICACION E INTERPRETACION
dc.relationinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-117910GB-C21/EL PAPEL DE LA MATERIA ORGANICA DISUELTA TERRESTRE, FLUVIAL Y MARINA EN EL ENLACE, TRANSPORTE Y BIODISPONIBILIDAD DE NUTRIENTES/CONTAMINANTES CLAVE
dc.relation.isformatofReproducció del document publicat a https://doi.org/10.1021/acs.est.3c00799
dc.relation.ispartofEnvironmental Science and Technology, 2023, vol.57, p. 7840-7848
dc.rightscc-by (c) Sans et al., 2023
dc.rightsAttribution 4.0 International*
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectBack accumulation
dc.subjectDGT
dc.subjectDissociation rate constant (kd)
dc.subjectNatural waters
dc.subject.otherEspeciació (Química)
dc.titleBack accumulation of diffusive gradients in thin-films devices with a stack of resin discs to assess availability of metal cations to biota in natural waters
dc.typeinfo:eu-repo/semantics/article
dc.type.versioninfo:eu-repo/semantics/publishedVersion
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