Investigating the Binding Heterogeneity of Trace Metal Cations With SiO2 Nanoparticles Using Full Wave Analysis of Stripping Chronopotentiometry at Scanned Deposition Potential

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorLIEC-
Autor(es): dc.contributorUniversity of Algarve-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.creatorRotureau, Elise-
Autor(es): dc.creatorRocha, Luciana S.-
Autor(es): dc.creatorGoveia, Danielle [UNESP]-
Autor(es): dc.creatorAlves, Nuno G.-
Autor(es): dc.creatorPinheiro, José Paulo-
Data de aceite: dc.date.accessioned2022-02-22T00:49:04Z-
Data de disponibilização: dc.date.available2022-02-22T00:49:04Z-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2020-12-15-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.3389/fchem.2020.614574-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/207057-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/207057-
Descrição: dc.descriptionSilica oxides nano- and microparticles, as well as silica-based materials, are very abundant in nature and industrial processes. Trace metal cation binding with these bulk materials is generally not considered significant in speciation studies in environmental systems. Nonetheless, this might change for nanoparticulate systems as observed in a previous study of Pb(II) with a very small SiO2 particle (7.5 nm diameter). Besides, metal binding by those nanoparticles is surprisingly characterized by a heterogeneity that increases with the decrease of metal-to-particle ratio. Therefore, it is interesting to extend this study to investigate different trace metals and the influence of the nanoparticle size on the cation binding heterogeneity. Consequently, the Cd(II), Pb(II), and Zn(II) binding by two different sized SiO2 nanoparticles (Ludox LS30 and TM40) in aqueous dispersion was studied for a range of pH and ionic strength conditions, using the combination of the electroanalytical techniques Scanned Stripping ChronoPotentiometry and Absence of Gradients and Nernstian Equilibrium Stripping. The coupling of these techniques provides the free metal concentration in the bulk (AGNES) and information of the free and complex concentration at the electrode surface for each Stripping Chronopotentiometry at Scanned deposition Potential (SSCP). A recent mathematical treatment allows the reconstruction of a portion of the metal to ligand binding isotherm with the included heterogeneity information using the full SSCP wave analysis. In this work, we observed that the Zn(II) binding is homogeneous, Cd(II) is slightly heterogeneous, and Pb(II) is moderately heterogeneous, whereas the results obtained with the 7.5 nm diameter nanoparticle are slightly more heterogeneous than those obtained with the one of 17 nm. These findings suggest that the Zn(II) binding is electrostatic in nature, and for both Cd(II) and Pb(II), there should be a significant chemical binding contribution.-
Descrição: dc.descriptionAgence Nationale de la Recherche-
Descrição: dc.descriptionInstitut national des sciences de l'Univers-
Descrição: dc.descriptionFundação para a Ciência e a Tecnologia-
Descrição: dc.descriptionUniversité de Lorraine CNRS LIEC-
Descrição: dc.descriptionCentro Interdisciplina de Quimica do Algarve (CIQA) Departamento de Quimica e Bioquimica (DQB)/Faculdade de Ciencia e Tecnologia (FCT) University of Algarve-
Descrição: dc.descriptionUniversidade Estadual Paulista (Unesp)-Campus de Itapeva-
Descrição: dc.descriptionUniversidade Estadual Paulista (Unesp)-Campus de Itapeva-
Descrição: dc.descriptionAgence Nationale de la Recherche: Blanc international II - Simi 6-
Descrição: dc.descriptionInstitut national des sciences de l'Univers: EC2CO 2015-2017-
Descrição: dc.descriptionFundação para a Ciência e a Tecnologia: FCT-ANR/AAG-MAA/0065/2012-
Descrição: dc.descriptionAgence Nationale de la Recherche: Mesure in situ de la speciation des métaux trace SPECIES-
Idioma: dc.languageen-
Relação: dc.relationFrontiers in Chemistry-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectAGNES-
Palavras-chave: dc.subjectbinding heterogeneity-
Palavras-chave: dc.subjectSiO2 nanoparticles-
Palavras-chave: dc.subjectSSCP-
Palavras-chave: dc.subjecttrace metal-
Título: dc.titleInvestigating the Binding Heterogeneity of Trace Metal Cations With SiO2 Nanoparticles Using Full Wave Analysis of Stripping Chronopotentiometry at Scanned Deposition Potential-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

Não existem arquivos associados a este item.