A new approach to improve the accuracy of DGT (Diffusive Gradients in Thin-films) measurements in monitoring wells

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorSantos, Cristiane Aily-
Autor(es): dc.creatorGemeiner, Hendryk-
Autor(es): dc.creatorMenegário, Amauri Antonio-
Autor(es): dc.creatorGalceran, Josep-
Autor(es): dc.creatorZanatta, Melina Borges Teixeira-
Autor(es): dc.creatorChang, Hung Kiang-
Data de aceite: dc.date.accessioned2025-08-21T20:10:08Z-
Data de disponibilização: dc.date.available2025-08-21T20:10:08Z-
Data de envio: dc.date.issued2022-05-01-
Data de envio: dc.date.issued2022-05-01-
Data de envio: dc.date.issued2022-01-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.talanta.2021.123044-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/233788-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/233788-
Descrição: dc.descriptionThe Diffusive Gradients in Thin-films (DGT) technique represents an ideal tool for monitoring water quality of inorganic species in systems with a high flow such as rivers, streams, lakes and seas. However, in low-flow systems (non-turbulent waters), the influence of a diffusive boundary layer (DBL) formed on the surface of the DGT device has been observed, which can lead to erroneous measurements by DGT. Therefore, the use of DGT in wells for groundwater monitoring is still very limited until now. In this sense, the present study evaluates the applicability of the DGT technique in non-turbulent and low-flow water systems. We propose a new way to calculate the DBL with the objective to carry out a robust DGT analysis in environmental monitoring wells. For this purpose, DGT devices with different diffusive gel thicknesses were deployed in an experimental set-up simulating a groundwater monitoring well. A DBL thickness (for each element) was calculated from the slopes of the linear regressions between the DGT accumulated mass of metal and the deployment time (4, 8, 12, 24 and 48 h) for each of the two diffusive gel thicknesses. The mean DBL thickness (averaging the individual DBL thicknesses calculated from the slopes) was 0.06 cm. The concentrations of the analysed elements were corrected with this DBL with the result that the metal concentrations measured by DGT improved and were highly approximated to their actual total values in this non-complexing medium.-
Descrição: dc.descriptionMinisterio de Ciencia, Innovación y Universidades-
Descrição: dc.descriptionAgencia Estatal de Investigación-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionFundação para o Desenvolvimento da UNESP (FUNDUNESP)-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionEnvironmental Studies Center (CEA) São Paulo State University (UNESP), Avenida 24-A, 1515-
Descrição: dc.descriptionDepartment of Applied Geology and Basin Studies Laboratory (LEBAC) São Paulo State University (UNESP), Avenida 24-A, 1515-
Descrição: dc.descriptionDepartment of Chemistry –Universitat de Lleida and AGROTECNIO-CERCA, Av Rovira Roure 191, Catalunya-
Descrição: dc.descriptionEnvironmental Studies Center (CEA) São Paulo State University (UNESP), Avenida 24-A, 1515-
Descrição: dc.descriptionDepartment of Applied Geology and Basin Studies Laboratory (LEBAC) São Paulo State University (UNESP), Avenida 24-A, 1515-
Descrição: dc.descriptionAgencia Estatal de Investigación: 10.13039/501100011033-
Descrição: dc.descriptionFAPESP: 2016/14227-5-
Descrição: dc.descriptionFAPESP: 2018/17069-3-
Descrição: dc.descriptionFAPESP: 2018/17069-7-
Descrição: dc.descriptionFAPESP: 2021/00572-0-
Descrição: dc.descriptionFUNDUNESP: 2625/2017-CCP-
Descrição: dc.descriptionCNPq: 308090/2019-5-
Descrição: dc.descriptionCNPq: 403666/2016-3-
Descrição: dc.descriptionFUNDUNESP: 5850.0106842.18.9-
Descrição: dc.descriptionAgencia Estatal de Investigación: PID2019-107033GB-
Idioma: dc.languageen-
Relação: dc.relationTalanta-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectDBL-
Palavras-chave: dc.subjectDiffusive gradients in thin-films-
Palavras-chave: dc.subjectGroundwater monitoring-
Palavras-chave: dc.subjectStagnant waters-
Palavras-chave: dc.subjectWell-
Título: dc.titleA new approach to improve the accuracy of DGT (Diffusive Gradients in Thin-films) measurements in monitoring wells-
Tipo de arquivo: dc.typelivro digital-
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