Availability of metals to DGT devices with different configurations. The case of sequential Ni complexation

The analytical technique DGT (Diffusive Gradients in Thin-films) is able to gain access to a wealth of information by carefully interpreting accumulation data from passive samplers with different configurations (i.e. different thicknesses of its constituent layers). A set of DGT devices were simulta...

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Autores: Sans Duñó, Jordi, Cecilia, Joan, Galceran i Nogués, Josep, Puy Llorens, Jaume
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2021
País:España
Institución:Universitat de Lleida (UdL)
Repositorio:Repositori Obert UdL
OAI Identifier:oai:repositori.udl.cat:10459.1/72657
Acceso en línea:https://doi.org/10.1016/j.scitotenv.2021.146277
http://hdl.handle.net/10459.1/72657
Access Level:acceso abierto
Palabra clave:DGT
Lability degree
Stoichiometry effects
Thickness of diffusion
Thickness of resin
NiNTA
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spelling Availability of metals to DGT devices with different configurations. The case of sequential Ni complexationSans Duñó, JordiCecilia, JoanGalceran i Nogués, JosepPuy Llorens, JaumeDGTLability degreeStoichiometry effectsThickness of diffusionThickness of resinNiNTAThe analytical technique DGT (Diffusive Gradients in Thin-films) is able to gain access to a wealth of information by carefully interpreting accumulation data from passive samplers with different configurations (i.e. different thicknesses of its constituent layers). A set of DGT devices were simultaneously deployed in solutions of Ni and nitrilotriacetic acid (NTA) of different concentrations to measure the availability of Ni in these solutions. Accumulations indicate that the availability of Ni depends on both the thickness of the resin and the thickness of the diffusive gel. In both cases, the lability degree increases as the thickness increases. As the formation of successive complexes (such as Ni(NTA)2) proceeds, the availability of the metal decreases, which is quantitatively explained by reducing the formulation to a case with only one complex, but with an effective dissociation rate constant that decreases as the concentration of NTA increases. Simple analytical expressions are reported to quantify the lability degree in the different DGT configurations. These results indicate that a set of different DGT devices can characterize the availability of a cation in a natural sample with uptake processes at different spatial or time scales. Alternatively, and from a more fundamental point of view, information on speciation, mobilities and labilities of the species present in natural samples can be obtained with a set of DGT configurations.Support from the Spanish Minister of Science and Innovation isgratefully acknowledged (Project PID2019-107033GB-C21). JSD ac-knowledges the University of Lleida for a fellowship PhD contract.Elsevier2021info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttps://doi.org/10.1016/j.scitotenv.2021.146277http://hdl.handle.net/10459.1/72657reponame:Repositori Obert UdL instname:Universitat de Lleida (UdL)Inglésinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-107033GB-C21Reproducció del document publicat a https://doi.org/10.1016/j.scitotenv.2021.146277Science of The Total Environment, 2021, vol. 779, núm. 146277, p. 1-12cc-by (c) Sans et al., 2021info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/oai:repositori.udl.cat:10459.1/726572026-06-24T12:42:17Z
dc.title.none.fl_str_mv Availability of metals to DGT devices with different configurations. The case of sequential Ni complexation
title Availability of metals to DGT devices with different configurations. The case of sequential Ni complexation
spellingShingle Availability of metals to DGT devices with different configurations. The case of sequential Ni complexation
Sans Duñó, Jordi
DGT
Lability degree
Stoichiometry effects
Thickness of diffusion
Thickness of resin
NiNTA
title_short Availability of metals to DGT devices with different configurations. The case of sequential Ni complexation
title_full Availability of metals to DGT devices with different configurations. The case of sequential Ni complexation
title_fullStr Availability of metals to DGT devices with different configurations. The case of sequential Ni complexation
title_full_unstemmed Availability of metals to DGT devices with different configurations. The case of sequential Ni complexation
title_sort Availability of metals to DGT devices with different configurations. The case of sequential Ni complexation
dc.creator.none.fl_str_mv Sans Duñó, Jordi
Cecilia, Joan
Galceran i Nogués, Josep
Puy Llorens, Jaume
author Sans Duñó, Jordi
author_facet Sans Duñó, Jordi
Cecilia, Joan
Galceran i Nogués, Josep
Puy Llorens, Jaume
author_role author
author2 Cecilia, Joan
Galceran i Nogués, Josep
Puy Llorens, Jaume
author2_role author
author
author
dc.subject.none.fl_str_mv DGT
Lability degree
Stoichiometry effects
Thickness of diffusion
Thickness of resin
NiNTA
topic DGT
Lability degree
Stoichiometry effects
Thickness of diffusion
Thickness of resin
NiNTA
description The analytical technique DGT (Diffusive Gradients in Thin-films) is able to gain access to a wealth of information by carefully interpreting accumulation data from passive samplers with different configurations (i.e. different thicknesses of its constituent layers). A set of DGT devices were simultaneously deployed in solutions of Ni and nitrilotriacetic acid (NTA) of different concentrations to measure the availability of Ni in these solutions. Accumulations indicate that the availability of Ni depends on both the thickness of the resin and the thickness of the diffusive gel. In both cases, the lability degree increases as the thickness increases. As the formation of successive complexes (such as Ni(NTA)2) proceeds, the availability of the metal decreases, which is quantitatively explained by reducing the formulation to a case with only one complex, but with an effective dissociation rate constant that decreases as the concentration of NTA increases. Simple analytical expressions are reported to quantify the lability degree in the different DGT configurations. These results indicate that a set of different DGT devices can characterize the availability of a cation in a natural sample with uptake processes at different spatial or time scales. Alternatively, and from a more fundamental point of view, information on speciation, mobilities and labilities of the species present in natural samples can be obtained with a set of DGT configurations.
publishDate 2021
dc.date.none.fl_str_mv 2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://doi.org/10.1016/j.scitotenv.2021.146277
http://hdl.handle.net/10459.1/72657
url https://doi.org/10.1016/j.scitotenv.2021.146277
http://hdl.handle.net/10459.1/72657
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-107033GB-C21
Reproducció del document publicat a https://doi.org/10.1016/j.scitotenv.2021.146277
Science of The Total Environment, 2021, vol. 779, núm. 146277, p. 1-12
dc.rights.none.fl_str_mv cc-by (c) Sans et al., 2021
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
rights_invalid_str_mv cc-by (c) Sans et al., 2021
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositori Obert UdL
instname:Universitat de Lleida (UdL)
instname_str Universitat de Lleida (UdL)
reponame_str Repositori Obert UdL
collection Repositori Obert UdL
repository.name.fl_str_mv
repository.mail.fl_str_mv
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