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.author | Sans Duñó, Jordi | |
dc.contributor.author | Cecilia Averós, Joan | |
dc.contributor.author | Galceran i Nogués, Josep | |
dc.contributor.author | Puy Llorens, Jaume | |
dc.contributor.author | Baeyens, Willy | |
dc.contributor.author | Gao, Yue | |
dc.date.accessioned | 2023-06-26T11:51:51Z | |
dc.date.available | 2023-06-26T11:51:51Z | |
dc.date.issued | 2023 | |
dc.description.abstract | Determining 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.sponsorship | Support 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.doi | https://doi.org/10.1021/acs.est.3c00799 | |
dc.identifier.idgrec | 034211 | |
dc.identifier.issn | 0013-936X | |
dc.identifier.uri | https://repositori.udl.cat/handle/10459.1/463567 | |
dc.language.iso | eng | |
dc.publisher | American Chemical Society | |
dc.relation | info: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.relation | info: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.isformatof | Reproducció del document publicat a https://doi.org/10.1021/acs.est.3c00799 | |
dc.relation.ispartof | Environmental Science and Technology, 2023, vol.57, p. 7840-7848 | |
dc.rights | cc-by (c) Sans et al., 2023 | |
dc.rights | Attribution 4.0 International | * |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | * |
dc.subject | Back accumulation | |
dc.subject | DGT | |
dc.subject | Dissociation rate constant (kd) | |
dc.subject | Natural waters | |
dc.subject.other | Especiació (Química) | |
dc.title | 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.type | info:eu-repo/semantics/article | |
dc.type.version | info:eu-repo/semantics/publishedVersion |