Thermal and electrochemical studies of the interaction of organophilic montmorillonite and chlorpyrifos

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dc.contributor.authorLupi, Caroline Polini [UNESP]
dc.contributor.authorFerreira, Antonio Ap. Pupim [UNESP]
dc.contributor.authorGuizellini, Filipe Corrêa [UNESP]
dc.contributor.authorPastre, Iêda Aparecida [UNESP]
dc.contributor.authorYamanaka, Hideko [UNESP]
dc.contributor.authorFertonani, Fernando Luis [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionSPR Soluções Metrológicas LTDA
dc.contributor.institutionItean College of Botucatu
dc.date.accessioned2023-07-29T13:33:17Z
dc.date.available2023-07-29T13:33:17Z
dc.date.issued2023-01-01
dc.description.abstractThis work investigates the thermal and electrochemical interaction of montmorillonite Clay (Mt) and a modified montmorillonite Clay (Mt-M) with a peptide sequence, which mimics the active site of the enzyme acetylcholinesterase, as well as their interactions with the chlorpyrifos pesticide. The methods used include thermal analysis techniques (DSC), X-ray diffraction, scanning electron microscopy, cyclic voltammetry, and electrochemical impedance spectroscopy. The electrochemical study was carried out in KCl 0.1 mol L−1, pH 7, containing a redox species Fe(CN)6–3/−4. The electrode surface coverage (θ) was 0.42 for Mt and 0.65 for Mt-M. The interpretation of the electrochemical impedance spectroscopy results was based on the charge transfer reaction involving the [Fe(CN)6]−3/−4 species at high frequencies, followed by diffusion through the monolayer at low frequencies. The heterogeneity of the Mt and Mt-M film formed on electrode surface limits the transport of [Fe(CN)6]−3/−4 through the montmorillonite layer since the Mt particles formed non-regular overlapping plates, observed under microscopy. The DSC analyses revealed disorganization in the structure of the organophilic clay with the insertion of the pesticide, reflected in the appropriate waters of the system.en
dc.description.affiliationDepartamento de Química Analítica Institute of Chemistry Araraquara São Paulo State University (Unesp), SP
dc.description.affiliationDepartamento de Química e Ciências Ambientais Institute of Biosciences Humanities and Exact Sciences São José do Rio Preto São Paulo State University (Unesp), SP
dc.description.affiliationSPR Soluções Metrológicas LTDA, SP
dc.description.affiliationToledo Teaching Institute Itean College of Botucatu
dc.description.affiliationUnespDepartamento de Química Analítica Institute of Chemistry Araraquara São Paulo State University (Unesp), SP
dc.description.affiliationUnespDepartamento de Química e Ciências Ambientais Institute of Biosciences Humanities and Exact Sciences São José do Rio Preto São Paulo State University (Unesp), SP
dc.format.extent107-117
dc.identifierhttp://dx.doi.org/10.1007/s10973-022-11880-w
dc.identifier.citationJournal of Thermal Analysis and Calorimetry, v. 148, n. 1, p. 107-117, 2023.
dc.identifier.doi10.1007/s10973-022-11880-w
dc.identifier.issn1588-2926
dc.identifier.issn1388-6150
dc.identifier.scopus2-s2.0-85144319522
dc.identifier.urihttp://hdl.handle.net/11449/248055
dc.language.isoeng
dc.relation.ispartofJournal of Thermal Analysis and Calorimetry
dc.sourceScopus
dc.subjectChlorpyrifos
dc.subjectDSC
dc.subjectElectrochemical interaction
dc.subjectOrganophilic montmorillonite
dc.titleThermal and electrochemical studies of the interaction of organophilic montmorillonite and chlorpyrifosen
dc.typeArtigo
unesp.author.orcid0000-0002-7533-2654[1]
unesp.author.orcid0000-0002-5114-2098[3]
unesp.author.orcid0000-0003-3855-2233[4]
unesp.author.orcid0000-0002-9835-9155[5]
unesp.author.orcid0000-0003-2893-8028[6]

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Artigos - Química Analítica - IQ
Artigos - Química e Ciências Ambientais - IBILCE