Reduction of hypervalent chromium in acidic media by alginic acid

Autores
Bertoni, Fernando Ariel; Bellú, Sebastián Eduardo; González, Juan Carlos; Sala, Luis Federico
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Selective oxidation of carboxylate groups present in alginic acid by CrVI affords CO2, oxidized alginic acid, and CrIII as final products. The redox reaction afforded first-order kinetics in [alginic acid], [CrVI], and [H+], at fixed ionic strength and temperature. Kinetic studies showed that the redox reaction proceeds through a mechanism which combines CrVI →CrIV → CrII and CrVI → CrIV → CrIII pathways. The mechanism was supported by the observation of free radicals, CrO22+ and CrV as reaction intermediates. The reduction of CrIV and CrV by alginic acid was independently studied and it was found to occur more than 103 times faster than alginic acid/CrVI reaction, in acid media. At pH 1–3, oxo-chromate(V)–alginic acid species remain in solution during several hours at 15 °C. The results showed that this abundant structural polysaccharide present on brown seaweeds is able to reduce CrVI/V/IV or stabilize high-valent chromium depending on pH value.
Fil: Bertoni, Fernando Ariel. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Química Rosario; Argentina
Fil: Bellú, Sebastián Eduardo. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Química Rosario; Argentina
Fil: González, Juan Carlos. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Química Rosario; Argentina
Fil: Sala, Luis Federico. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Química Rosario; Argentina
Materia
ALGINIC ACID
OXIDATION
CHROMIUM
KINETICS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/5981
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/5981
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Reduction of hypervalent chromium in acidic media by alginic acidBertoni, Fernando ArielBellú, Sebastián EduardoGonzález, Juan CarlosSala, Luis FedericoALGINIC ACIDOXIDATIONCHROMIUMKINETICShttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1Selective oxidation of carboxylate groups present in alginic acid by CrVI affords CO2, oxidized alginic acid, and CrIII as final products. The redox reaction afforded first-order kinetics in [alginic acid], [CrVI], and [H+], at fixed ionic strength and temperature. Kinetic studies showed that the redox reaction proceeds through a mechanism which combines CrVI →CrIV → CrII and CrVI → CrIV → CrIII pathways. The mechanism was supported by the observation of free radicals, CrO22+ and CrV as reaction intermediates. The reduction of CrIV and CrV by alginic acid was independently studied and it was found to occur more than 103 times faster than alginic acid/CrVI reaction, in acid media. At pH 1–3, oxo-chromate(V)–alginic acid species remain in solution during several hours at 15 °C. The results showed that this abundant structural polysaccharide present on brown seaweeds is able to reduce CrVI/V/IV or stabilize high-valent chromium depending on pH value.Fil: Bertoni, Fernando Ariel. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Química Rosario; ArgentinaFil: Bellú, Sebastián Eduardo. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Química Rosario; ArgentinaFil: González, Juan Carlos. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Química Rosario; ArgentinaFil: Sala, Luis Federico. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Química Rosario; ArgentinaElsevier2014-08-08info: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/11336/5981Bertoni, Fernando Ariel; Bellú, Sebastián Eduardo; González, Juan Carlos; Sala, Luis Federico; Reduction of hypervalent chromium in acidic media by alginic acid; Elsevier; Carbohydrate Polymers; 114; 8-8-2014; 1-110144-8617enginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0144861714007504info:eu-repo/semantics/altIdentifier/doi/10.1016/j.carbpol.2014.07.065info:eu-repo/semantics/altIdentifier/doi/info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:06:33Zoai:ri.conicet.gov.ar:11336/5981instacron: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:34982025-09-03 10:06:34.159CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Reduction of hypervalent chromium in acidic media by alginic acid
title Reduction of hypervalent chromium in acidic media by alginic acid
spellingShingle Reduction of hypervalent chromium in acidic media by alginic acid
Bertoni, Fernando Ariel
ALGINIC ACID
OXIDATION
CHROMIUM
KINETICS
title_short Reduction of hypervalent chromium in acidic media by alginic acid
title_full Reduction of hypervalent chromium in acidic media by alginic acid
title_fullStr Reduction of hypervalent chromium in acidic media by alginic acid
title_full_unstemmed Reduction of hypervalent chromium in acidic media by alginic acid
title_sort Reduction of hypervalent chromium in acidic media by alginic acid
dc.creator.none.fl_str_mv Bertoni, Fernando Ariel
Bellú, Sebastián Eduardo
González, Juan Carlos
Sala, Luis Federico
author Bertoni, Fernando Ariel
author_facet Bertoni, Fernando Ariel
Bellú, Sebastián Eduardo
González, Juan Carlos
Sala, Luis Federico
author_role author
author2 Bellú, Sebastián Eduardo
González, Juan Carlos
Sala, Luis Federico
author2_role author
author
author
dc.subject.none.fl_str_mv ALGINIC ACID
OXIDATION
CHROMIUM
KINETICS
topic ALGINIC ACID
OXIDATION
CHROMIUM
KINETICS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Selective oxidation of carboxylate groups present in alginic acid by CrVI affords CO2, oxidized alginic acid, and CrIII as final products. The redox reaction afforded first-order kinetics in [alginic acid], [CrVI], and [H+], at fixed ionic strength and temperature. Kinetic studies showed that the redox reaction proceeds through a mechanism which combines CrVI →CrIV → CrII and CrVI → CrIV → CrIII pathways. The mechanism was supported by the observation of free radicals, CrO22+ and CrV as reaction intermediates. The reduction of CrIV and CrV by alginic acid was independently studied and it was found to occur more than 103 times faster than alginic acid/CrVI reaction, in acid media. At pH 1–3, oxo-chromate(V)–alginic acid species remain in solution during several hours at 15 °C. The results showed that this abundant structural polysaccharide present on brown seaweeds is able to reduce CrVI/V/IV or stabilize high-valent chromium depending on pH value.
Fil: Bertoni, Fernando Ariel. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Química Rosario; Argentina
Fil: Bellú, Sebastián Eduardo. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Química Rosario; Argentina
Fil: González, Juan Carlos. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Química Rosario; Argentina
Fil: Sala, Luis Federico. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Química Rosario; Argentina
description Selective oxidation of carboxylate groups present in alginic acid by CrVI affords CO2, oxidized alginic acid, and CrIII as final products. The redox reaction afforded first-order kinetics in [alginic acid], [CrVI], and [H+], at fixed ionic strength and temperature. Kinetic studies showed that the redox reaction proceeds through a mechanism which combines CrVI →CrIV → CrII and CrVI → CrIV → CrIII pathways. The mechanism was supported by the observation of free radicals, CrO22+ and CrV as reaction intermediates. The reduction of CrIV and CrV by alginic acid was independently studied and it was found to occur more than 103 times faster than alginic acid/CrVI reaction, in acid media. At pH 1–3, oxo-chromate(V)–alginic acid species remain in solution during several hours at 15 °C. The results showed that this abundant structural polysaccharide present on brown seaweeds is able to reduce CrVI/V/IV or stabilize high-valent chromium depending on pH value.
publishDate 2014
dc.date.none.fl_str_mv 2014-08-08
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/11336/5981
Bertoni, Fernando Ariel; Bellú, Sebastián Eduardo; González, Juan Carlos; Sala, Luis Federico; Reduction of hypervalent chromium in acidic media by alginic acid; Elsevier; Carbohydrate Polymers; 114; 8-8-2014; 1-11
0144-8617
url http://hdl.handle.net/11336/5981
identifier_str_mv Bertoni, Fernando Ariel; Bellú, Sebastián Eduardo; González, Juan Carlos; Sala, Luis Federico; Reduction of hypervalent chromium in acidic media by alginic acid; Elsevier; Carbohydrate Polymers; 114; 8-8-2014; 1-11
0144-8617
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0144861714007504
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.carbpol.2014.07.065
info:eu-repo/semantics/altIdentifier/doi/
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/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 Elsevier
publisher.none.fl_str_mv Elsevier
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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