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dc.contributor.author
Heredia, Angelica Constanza
dc.contributor.author
Gómez Avila, Jenny
dc.contributor.author
Garay, Fernando Sebastian
dc.contributor.author
Crivello, Mónica Elsie
dc.date.available
2018-04-20T17:58:37Z
dc.date.issued
2017-11
dc.identifier.citation
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
dc.identifier.issn
1432-8488
dc.identifier.uri
http://hdl.handle.net/11336/42881
dc.description.abstract
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.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Electroanalisis
dc.subject
Hidroxidos Dobles Laminares
dc.subject
Arsenico
dc.subject
Swv
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Otras Ciencias Químicas
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Ciencias Químicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Cathodic stripping square-wave voltammetry for assessing As(III) removal with synthetic mixed oxides
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-04-19T12:54:10Z
dc.identifier.eissn
1433-0768
dc.journal.volume
21
dc.journal.number
12
dc.journal.pagination
3619-3629
dc.journal.pais
Alemania
dc.description.fil
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
dc.description.fil
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
dc.description.fil
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
dc.description.fil
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
dc.journal.title
Journal of Solid State Electrochemistry (print)
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/s10008-017-3709-x
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007%2Fs10008-017-3709-x
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