Cathodic stripping square-wave voltammetry for assessing As(III) removal with synthetic mixed oxides

Autores
Heredia, Angelica Constanza; Gómez Avila, Jenny; Garay, Fernando Sebastian; Crivello, Mónica Elsie
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The possibility of counting with a reliable and economic system for filtering large volumes of water contaminated with arsenic is highly desired since different species of this element conform a major health risk through contamination of drinking and irrigation water supplies. In this work, the adsorption of As(III) species from aqueous solutions onto Mixed Oxides (MOs) synthesized from Layered Double Hydroxides (LDHs) has been assessed by cathodic stripping Square-wave voltammetry (CS-SWV). This electrochemical technique provides the fast, reliable, and systematic analysis required for studding the numerous aqueous samples. The optimized protocol consisted on the accumulation of arsenic for 60 s at ?0.4 V, in presence of 0.5 mM Cu(II), 0.3 µM pyrrolidine dithiocarbamate (PDTC), and 0.9 M HCl, followed by a reductive scan to ?1.0 V. A stable and well-defined peak was observed at ?0.780 V, with a linear range that goes from 2 µg L?1 to 110 µg L?1 of As(III). A value of limit of detection (LOD) = 4 µgL?1 was calculated as 3 times the ratio between the standard deviation of the ordinate and slope of the linear regression curve. The presence of Cu(II) increases the signal of current and minimizes the effect of interfering species, while the ligand PDTC forms a complex that stabilizes the signal observed during the cathodic scan.A series of MgAlFe ternary LDHs with different iron content and their MOs have been synthesized by co-precipitation and characterized by diverse techniques. XPS and DRUV-Vis analysis showed that the Fe(III) ions can be found in tetrahedral and octahedral coordination environments, while SEM micrographs, evidenced the cluster formation and aggregates of particles when the Fe/(Fe+Al) molar ratio is increased. The capacity of MOs for removing As(III) has been studied at different contact times in a batch reactor and in all cases removals of As(III) above 75% were achieved.
Fil: Heredia, Angelica Constanza. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigación y Tecnología Química. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación y Tecnología Química; Argentina
Fil: Gómez Avila, Jenny. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigación y Tecnología Química. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación y Tecnología Química; Argentina
Fil: Garay, Fernando Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina
Fil: Crivello, Mónica Elsie. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigación y Tecnología Química. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación y Tecnología Química; Argentina
Materia
Electroanalisis
Hidroxidos Dobles Laminares
Arsenico
Swv
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/42881
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/42881
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Cathodic stripping square-wave voltammetry for assessing As(III) removal with synthetic mixed oxidesHeredia, Angelica ConstanzaGómez Avila, JennyGaray, Fernando SebastianCrivello, Mónica ElsieElectroanalisisHidroxidos Dobles LaminaresArsenicoSwvhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The possibility of counting with a reliable and economic system for filtering large volumes of water contaminated with arsenic is highly desired since different species of this element conform a major health risk through contamination of drinking and irrigation water supplies. In this work, the adsorption of As(III) species from aqueous solutions onto Mixed Oxides (MOs) synthesized from Layered Double Hydroxides (LDHs) has been assessed by cathodic stripping Square-wave voltammetry (CS-SWV). This electrochemical technique provides the fast, reliable, and systematic analysis required for studding the numerous aqueous samples. The optimized protocol consisted on the accumulation of arsenic for 60 s at ?0.4 V, in presence of 0.5 mM Cu(II), 0.3 µM pyrrolidine dithiocarbamate (PDTC), and 0.9 M HCl, followed by a reductive scan to ?1.0 V. A stable and well-defined peak was observed at ?0.780 V, with a linear range that goes from 2 µg L?1 to 110 µg L?1 of As(III). A value of limit of detection (LOD) = 4 µgL?1 was calculated as 3 times the ratio between the standard deviation of the ordinate and slope of the linear regression curve. The presence of Cu(II) increases the signal of current and minimizes the effect of interfering species, while the ligand PDTC forms a complex that stabilizes the signal observed during the cathodic scan.A series of MgAlFe ternary LDHs with different iron content and their MOs have been synthesized by co-precipitation and characterized by diverse techniques. XPS and DRUV-Vis analysis showed that the Fe(III) ions can be found in tetrahedral and octahedral coordination environments, while SEM micrographs, evidenced the cluster formation and aggregates of particles when the Fe/(Fe+Al) molar ratio is increased. The capacity of MOs for removing As(III) has been studied at different contact times in a batch reactor and in all cases removals of As(III) above 75% were achieved.Fil: Heredia, Angelica Constanza. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigación y Tecnología Química. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación y Tecnología Química; ArgentinaFil: Gómez Avila, Jenny. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigación y Tecnología Química. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación y Tecnología Química; ArgentinaFil: Garay, Fernando Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; ArgentinaFil: Crivello, Mónica Elsie. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigación y Tecnología Química. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación y Tecnología Química; ArgentinaSpringer2017-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/42881Heredia, Angelica Constanza; Gómez Avila, Jenny; Garay, Fernando Sebastian; Crivello, Mónica Elsie; Cathodic stripping square-wave voltammetry for assessing As(III) removal with synthetic mixed oxides; Springer; Journal of Solid State Electrochemistry (print); 21; 12; 11-2017; 3619-36291432-84881433-0768CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1007/s10008-017-3709-xinfo:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007%2Fs10008-017-3709-xinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:44:07Zoai:ri.conicet.gov.ar:11336/42881instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:44:08.204CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Cathodic stripping square-wave voltammetry for assessing As(III) removal with synthetic mixed oxides
title Cathodic stripping square-wave voltammetry for assessing As(III) removal with synthetic mixed oxides
spellingShingle Cathodic stripping square-wave voltammetry for assessing As(III) removal with synthetic mixed oxides
Heredia, Angelica Constanza
Electroanalisis
Hidroxidos Dobles Laminares
Arsenico
Swv
title_short Cathodic stripping square-wave voltammetry for assessing As(III) removal with synthetic mixed oxides
title_full Cathodic stripping square-wave voltammetry for assessing As(III) removal with synthetic mixed oxides
title_fullStr Cathodic stripping square-wave voltammetry for assessing As(III) removal with synthetic mixed oxides
title_full_unstemmed Cathodic stripping square-wave voltammetry for assessing As(III) removal with synthetic mixed oxides
title_sort Cathodic stripping square-wave voltammetry for assessing As(III) removal with synthetic mixed oxides
dc.creator.none.fl_str_mv Heredia, Angelica Constanza
Gómez Avila, Jenny
Garay, Fernando Sebastian
Crivello, Mónica Elsie
author Heredia, Angelica Constanza
author_facet Heredia, Angelica Constanza
Gómez Avila, Jenny
Garay, Fernando Sebastian
Crivello, Mónica Elsie
author_role author
author2 Gómez Avila, Jenny
Garay, Fernando Sebastian
Crivello, Mónica Elsie
author2_role author
author
author
dc.subject.none.fl_str_mv Electroanalisis
Hidroxidos Dobles Laminares
Arsenico
Swv
topic Electroanalisis
Hidroxidos Dobles Laminares
Arsenico
Swv
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The possibility of counting with a reliable and economic system for filtering large volumes of water contaminated with arsenic is highly desired since different species of this element conform a major health risk through contamination of drinking and irrigation water supplies. In this work, the adsorption of As(III) species from aqueous solutions onto Mixed Oxides (MOs) synthesized from Layered Double Hydroxides (LDHs) has been assessed by cathodic stripping Square-wave voltammetry (CS-SWV). This electrochemical technique provides the fast, reliable, and systematic analysis required for studding the numerous aqueous samples. The optimized protocol consisted on the accumulation of arsenic for 60 s at ?0.4 V, in presence of 0.5 mM Cu(II), 0.3 µM pyrrolidine dithiocarbamate (PDTC), and 0.9 M HCl, followed by a reductive scan to ?1.0 V. A stable and well-defined peak was observed at ?0.780 V, with a linear range that goes from 2 µg L?1 to 110 µg L?1 of As(III). A value of limit of detection (LOD) = 4 µgL?1 was calculated as 3 times the ratio between the standard deviation of the ordinate and slope of the linear regression curve. The presence of Cu(II) increases the signal of current and minimizes the effect of interfering species, while the ligand PDTC forms a complex that stabilizes the signal observed during the cathodic scan.A series of MgAlFe ternary LDHs with different iron content and their MOs have been synthesized by co-precipitation and characterized by diverse techniques. XPS and DRUV-Vis analysis showed that the Fe(III) ions can be found in tetrahedral and octahedral coordination environments, while SEM micrographs, evidenced the cluster formation and aggregates of particles when the Fe/(Fe+Al) molar ratio is increased. The capacity of MOs for removing As(III) has been studied at different contact times in a batch reactor and in all cases removals of As(III) above 75% were achieved.
Fil: Heredia, Angelica Constanza. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigación y Tecnología Química. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación y Tecnología Química; Argentina
Fil: Gómez Avila, Jenny. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigación y Tecnología Química. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación y Tecnología Química; Argentina
Fil: Garay, Fernando Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina
Fil: Crivello, Mónica Elsie. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigación y Tecnología Química. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación y Tecnología Química; Argentina
description The possibility of counting with a reliable and economic system for filtering large volumes of water contaminated with arsenic is highly desired since different species of this element conform a major health risk through contamination of drinking and irrigation water supplies. In this work, the adsorption of As(III) species from aqueous solutions onto Mixed Oxides (MOs) synthesized from Layered Double Hydroxides (LDHs) has been assessed by cathodic stripping Square-wave voltammetry (CS-SWV). This electrochemical technique provides the fast, reliable, and systematic analysis required for studding the numerous aqueous samples. The optimized protocol consisted on the accumulation of arsenic for 60 s at ?0.4 V, in presence of 0.5 mM Cu(II), 0.3 µM pyrrolidine dithiocarbamate (PDTC), and 0.9 M HCl, followed by a reductive scan to ?1.0 V. A stable and well-defined peak was observed at ?0.780 V, with a linear range that goes from 2 µg L?1 to 110 µg L?1 of As(III). A value of limit of detection (LOD) = 4 µgL?1 was calculated as 3 times the ratio between the standard deviation of the ordinate and slope of the linear regression curve. The presence of Cu(II) increases the signal of current and minimizes the effect of interfering species, while the ligand PDTC forms a complex that stabilizes the signal observed during the cathodic scan.A series of MgAlFe ternary LDHs with different iron content and their MOs have been synthesized by co-precipitation and characterized by diverse techniques. XPS and DRUV-Vis analysis showed that the Fe(III) ions can be found in tetrahedral and octahedral coordination environments, while SEM micrographs, evidenced the cluster formation and aggregates of particles when the Fe/(Fe+Al) molar ratio is increased. The capacity of MOs for removing As(III) has been studied at different contact times in a batch reactor and in all cases removals of As(III) above 75% were achieved.
publishDate 2017
dc.date.none.fl_str_mv 2017-11
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/42881
Heredia, Angelica Constanza; Gómez Avila, Jenny; Garay, Fernando Sebastian; Crivello, Mónica Elsie; Cathodic stripping square-wave voltammetry for assessing As(III) removal with synthetic mixed oxides; Springer; Journal of Solid State Electrochemistry (print); 21; 12; 11-2017; 3619-3629
1432-8488
1433-0768
CONICET Digital
CONICET
url http://hdl.handle.net/11336/42881
identifier_str_mv Heredia, Angelica Constanza; Gómez Avila, Jenny; Garay, Fernando Sebastian; Crivello, Mónica Elsie; Cathodic stripping square-wave voltammetry for assessing As(III) removal with synthetic mixed oxides; Springer; Journal of Solid State Electrochemistry (print); 21; 12; 11-2017; 3619-3629
1432-8488
1433-0768
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1007/s10008-017-3709-x
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007%2Fs10008-017-3709-x
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
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eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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