Speciation of Inorganic Compounds in Aquatic Systems Using Diffusive Gradients in Thin-Films: A Review

dc.contributor.authorGalceran i Nogués, Josep
dc.contributor.authorGao, Yue
dc.contributor.authorPuy Llorens, Jaume
dc.contributor.authorLeermakers, Martine
dc.contributor.authorRey Castro, Carlos
dc.contributor.authorZhou, Chunyang
dc.contributor.authorBaeyens, Willy
dc.date.accessioned2021-11-22T11:28:19Z
dc.date.available2021-11-22T11:28:19Z
dc.date.issued2021
dc.description.abstractThe speciation of trace metals in an aquatic system involves the determination of free ions, complexes (labile and non-labile), colloids, and the total dissolved concentration. In this paper, we review the integrated assessment of free ions and labile metal complexes using Diffusive Gradients in Thin-films (DGT), a dynamic speciation technique. The device consists of a diffusive hydrogel layer made of polyacrylamide, backed by a layer of resin (usually Chelex-100) for all trace metals except for Hg. The best results for Hg speciation are obtained with agarose as hydrogel and a thiol-based resin. The diffusive domain controls the diffusion flux of the metal ions and complexes to the resin, which strongly binds all free ions. By using DGT devices with different thicknesses of the diffusive or resin gels and exploiting expressions derived from kinetic models, one can determine the labile concentrations, mobilities, and labilities of different species of an element in an aquatic system. This procedure has been applied to the determination of the organic pool of trace metals in freshwaters or to the characterization of organic and inorganic complexes in sea waters. The concentrations that are obtained represent time-weighted averages (TWA) over the deployment period.ca_ES
dc.description.sponsorshipJG, JP, and CR-C gratefully acknowledge support for this research from the Spanish Ministry of Science and Innovation (Project PID2019-107033GB-C21). YG and ML acknowledge FWO LEAD project (FWO AL911) and VUB SRP II. CZ is supported by Chinese Scholarship Council (PhD fellowship 201606190219).ca_ES
dc.identifier.doihttps://doi.org/10.3389/fchem.2021.624511
dc.identifier.idgrec031738
dc.identifier.issn2296-2646
dc.identifier.urihttp://hdl.handle.net/10459.1/72393
dc.language.isoengca_ES
dc.publisherFrontiers Mediaca_ES
dc.relationinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-107033GB-C21/ES/CAPTADORES PASIVOS (DGT, DMT) Y TECNICAS ELECTROANALITICAS PARA ESPECIACION Y DISPONIBILIDAD EN AGUAS NATURALES Y SUELOS: MODELIZACION, DESARROLLO, APLICACION E INTERPRETACION/ca_ES
dc.relation.isformatofReproducció del document publicat a https://doi.org/10.3389/fchem.2021.624511ca_ES
dc.relation.ispartofFrontiers in Chemistry, 2021, vol. 9, 624511ca_ES
dc.rightscc-by (c) Galceran et al., 2021ca_ES
dc.rights.accessRightsinfo:eu-repo/semantics/openAccessca_ES
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectTrace metal speciationca_ES
dc.subjectDGTca_ES
dc.subjectDiffusive domainca_ES
dc.subjectKinetic modelca_ES
dc.subjectMobilityca_ES
dc.subjectLabilityca_ES
dc.titleSpeciation of Inorganic Compounds in Aquatic Systems Using Diffusive Gradients in Thin-Films: A Reviewca_ES
dc.typeinfo:eu-repo/semantics/articleca_ES
dc.type.versioninfo:eu-repo/semantics/publishedVersionca_ES
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