A simple, green and low-cost agarose-based binding layer for simultaneous determination of cations and anions in aquatic systems using DGT

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Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversidade Estadual de Campinas (UNICAMP)-
Autor(es): dc.contributorGéoscience Environnement Toulouse (GET)-
Autor(es): dc.creatorEismann, Carlos Eduardo-
Autor(es): dc.creatorMenegário, Amauri Antonio-
Autor(es): dc.creatorGeraldo de Oliveira, Edson-
Autor(es): dc.creatorElias, Lucas Pellegrini-
Autor(es): dc.creatorMartins Viana, José Lucas-
Autor(es): dc.creatorTeixeira Zanatta, Melina Borges-
Autor(es): dc.creatorBarbiero, Laurent-
Autor(es): dc.creatorFostier, Anne Hélène-
Data de aceite: dc.date.accessioned2025-08-21T19:40:38Z-
Data de disponibilização: dc.date.available2025-08-21T19:40:38Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2023-06-23-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1039/d3ay00682d-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/303974-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/303974-
Descrição: dc.descriptionThe diffusive gradients in thin films (DGT) technique pre-concentrates labile species of trace elements, giving time-integrated in situ information about their labile concentrations. All previous DGT approaches for simultaneous uptake of cations and anions have used the hazardous polyacrylamide reagent to immobilize the binding phase. The present work proposes a diffusive layer of agarose and a mixed binding layer of ZrO2 and Chelex 100 immobilized in an agarose hydrogel to simultaneously determine the labile concentration of cations (Mn, Co, Ni, Cu, Zn and Cd) and anions (V, As, Se, Mo and Sb) in aquatic systems. The use of both layers using agarose instead of carcinogenic polyacrylamide as the hydrogel significantly reduces the costs and simplifies the manufacturing process. The proposed device was evaluated through recovery tests, deployment curves and pH/ionic strength tests. The mixed binding layer was compared with commercially available DGT devices for in situ deployment in river water. The relationships between accumulated mass and time (24 h) was linear (r2 > 0.9) for all analytes. The diffusion coefficients obtained were consistent with the literature, ranging from 3.98 to 8.43 × 10−6 cm2 s−1. Except for Zn at pH 8.0, the obtained values of CDGT/Cbulk were within the range of 1.00 ± 0.2 for the studied range of pH and for most ionic strengths. However, at low ionic strength, the concentrations of Mn, Co, Ni, Zn, V and Mo were underestimated. The concentrations of trace elements determined in river water using the proposed devices agreed with the labile concentrations determined by using commercial devices.-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionSão Paulo State University (Unesp) Environmental Studies Center, Av. 24-A, 1515, SP-
Descrição: dc.descriptionInstitute of Chemistry University of Campinas UNICAMP, P.O. Box 6154, SP-
Descrição: dc.descriptionUniversité P. Sabatier IRD CNRS OMP Géoscience Environnement Toulouse (GET), 14 Avenue Edouard Belin-
Descrição: dc.descriptionSão Paulo State University (Unesp) Environmental Studies Center, Av. 24-A, 1515, SP-
Formato: dc.format3310-3317-
Idioma: dc.languageen-
Relação: dc.relationAnalytical Methods-
???dc.source???: dc.sourceScopus-
Título: dc.titleA simple, green and low-cost agarose-based binding layer for simultaneous determination of cations and anions in aquatic systems using DGT-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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