Highly efficient removal of Cr(VI) from water with nanoparticulated zerovalent iron: Understanding the Fe(III)-Cr(III) passive outer layer structure

Autores
Montesinos, Victor Nahuel; Quici, Natalia; Halac, Emilia Beatriz; Leyva de Guglielmino, Ana Gabriela; Custo, Graciela Susana; Bengió, Silvina; Zampieri, Guillermo Enrique; Litter, Marta Irene
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Nanoscale zerovalent iron (nZVI) particles were successfully employed for Cr(VI) removal from aqueous solutions at pH 3. It was found that the capacity of the system increases with increasing nZVI dosage. Starting at 300. μM, a complete Cr(VI) conversion was achieved in 30. min with a Fe:Cr(VI) molar ratio (MR) of 3, and 45% conversion with MR= 1 over the same period of time. The material exhibited an enhanced reactivity in comparison with other previously tested similar materials. The proposed mechanism involves an initial reduction of Cr(VI) to Cr(III) by reaction with Fe0 or Fe(II) on the particle surface or in solution (secondary pathway), followed by an arrest on Cr(VI) removal attributed to the passivation of the surface of the nanoparticles. Passivation was confirmed by Raman and X-ray photoelectron spectroscopies (XPS). Furthermore, XPS analysis demonstrated that Cr(III) is the only Cr species present in the external layer of the nanoparticles after the reaction. Raman analysis and XPS measurements performed after mild sputtering showed that nZVI exposed to Cr(VI) presented a structure, from outside to inside, of hydroxychromites→magnetite→Fe0. © 2014 Elsevier B.V.
Fil: Montesinos, Victor Nahuel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina
Fil: Quici, Natalia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica; Argentina
Fil: Halac, Emilia Beatriz. Comisión Nacional de Energía Atómica; Argentina
Fil: Leyva de Guglielmino, Ana Gabriela. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina. Universidad Nacional de San Martín. Escuela de Ciencia y Tecnología; Argentina
Fil: Custo, Graciela Susana. Comisión Nacional de Energía Atómica; Argentina
Fil: Bengió, Silvina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina
Fil: Zampieri, Guillermo Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
Fil: Litter, Marta Irene. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica; Argentina. Universidad Nacional de San Martín; Argentina
Materia
Hexavalent Chromium
Nanoscale Zerovalent Iron
Raman Spectroscopy
Xps Analysis
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:11336/39761
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/39761
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Highly efficient removal of Cr(VI) from water with nanoparticulated zerovalent iron: Understanding the Fe(III)-Cr(III) passive outer layer structureMontesinos, Victor NahuelQuici, NataliaHalac, Emilia BeatrizLeyva de Guglielmino, Ana GabrielaCusto, Graciela SusanaBengió, SilvinaZampieri, Guillermo EnriqueLitter, Marta IreneHexavalent ChromiumNanoscale Zerovalent IronRaman SpectroscopyXps Analysishttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1Nanoscale zerovalent iron (nZVI) particles were successfully employed for Cr(VI) removal from aqueous solutions at pH 3. It was found that the capacity of the system increases with increasing nZVI dosage. Starting at 300. μM, a complete Cr(VI) conversion was achieved in 30. min with a Fe:Cr(VI) molar ratio (MR) of 3, and 45% conversion with MR= 1 over the same period of time. The material exhibited an enhanced reactivity in comparison with other previously tested similar materials. The proposed mechanism involves an initial reduction of Cr(VI) to Cr(III) by reaction with Fe0 or Fe(II) on the particle surface or in solution (secondary pathway), followed by an arrest on Cr(VI) removal attributed to the passivation of the surface of the nanoparticles. Passivation was confirmed by Raman and X-ray photoelectron spectroscopies (XPS). Furthermore, XPS analysis demonstrated that Cr(III) is the only Cr species present in the external layer of the nanoparticles after the reaction. Raman analysis and XPS measurements performed after mild sputtering showed that nZVI exposed to Cr(VI) presented a structure, from outside to inside, of hydroxychromites→magnetite→Fe0. © 2014 Elsevier B.V.Fil: Montesinos, Victor Nahuel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; ArgentinaFil: Quici, Natalia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica; ArgentinaFil: Halac, Emilia Beatriz. Comisión Nacional de Energía Atómica; ArgentinaFil: Leyva de Guglielmino, Ana Gabriela. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina. Universidad Nacional de San Martín. Escuela de Ciencia y Tecnología; ArgentinaFil: Custo, Graciela Susana. Comisión Nacional de Energía Atómica; ArgentinaFil: Bengió, Silvina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; ArgentinaFil: Zampieri, Guillermo Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; ArgentinaFil: Litter, Marta Irene. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica; Argentina. Universidad Nacional de San Martín; ArgentinaElsevier Science Sa2014-05-15info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/39761Montesinos, Victor Nahuel; Quici, Natalia; Halac, Emilia Beatriz; Leyva de Guglielmino, Ana Gabriela; Custo, Graciela Susana; et al.; Highly efficient removal of Cr(VI) from water with nanoparticulated zerovalent iron: Understanding the Fe(III)-Cr(III) passive outer layer structure; Elsevier Science Sa; Chemical Engineering Journal; 244; 15-5-2014; 569-5751385-8947CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.cej.2014.01.093info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1385894714001181info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:00:52Zoai:ri.conicet.gov.ar:11336/39761instacron: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 10:00:53.65CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Highly efficient removal of Cr(VI) from water with nanoparticulated zerovalent iron: Understanding the Fe(III)-Cr(III) passive outer layer structure
title Highly efficient removal of Cr(VI) from water with nanoparticulated zerovalent iron: Understanding the Fe(III)-Cr(III) passive outer layer structure
spellingShingle Highly efficient removal of Cr(VI) from water with nanoparticulated zerovalent iron: Understanding the Fe(III)-Cr(III) passive outer layer structure
Montesinos, Victor Nahuel
Hexavalent Chromium
Nanoscale Zerovalent Iron
Raman Spectroscopy
Xps Analysis
title_short Highly efficient removal of Cr(VI) from water with nanoparticulated zerovalent iron: Understanding the Fe(III)-Cr(III) passive outer layer structure
title_full Highly efficient removal of Cr(VI) from water with nanoparticulated zerovalent iron: Understanding the Fe(III)-Cr(III) passive outer layer structure
title_fullStr Highly efficient removal of Cr(VI) from water with nanoparticulated zerovalent iron: Understanding the Fe(III)-Cr(III) passive outer layer structure
title_full_unstemmed Highly efficient removal of Cr(VI) from water with nanoparticulated zerovalent iron: Understanding the Fe(III)-Cr(III) passive outer layer structure
title_sort Highly efficient removal of Cr(VI) from water with nanoparticulated zerovalent iron: Understanding the Fe(III)-Cr(III) passive outer layer structure
dc.creator.none.fl_str_mv Montesinos, Victor Nahuel
Quici, Natalia
Halac, Emilia Beatriz
Leyva de Guglielmino, Ana Gabriela
Custo, Graciela Susana
Bengió, Silvina
Zampieri, Guillermo Enrique
Litter, Marta Irene
author Montesinos, Victor Nahuel
author_facet Montesinos, Victor Nahuel
Quici, Natalia
Halac, Emilia Beatriz
Leyva de Guglielmino, Ana Gabriela
Custo, Graciela Susana
Bengió, Silvina
Zampieri, Guillermo Enrique
Litter, Marta Irene
author_role author
author2 Quici, Natalia
Halac, Emilia Beatriz
Leyva de Guglielmino, Ana Gabriela
Custo, Graciela Susana
Bengió, Silvina
Zampieri, Guillermo Enrique
Litter, Marta Irene
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Hexavalent Chromium
Nanoscale Zerovalent Iron
Raman Spectroscopy
Xps Analysis
topic Hexavalent Chromium
Nanoscale Zerovalent Iron
Raman Spectroscopy
Xps Analysis
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Nanoscale zerovalent iron (nZVI) particles were successfully employed for Cr(VI) removal from aqueous solutions at pH 3. It was found that the capacity of the system increases with increasing nZVI dosage. Starting at 300. μM, a complete Cr(VI) conversion was achieved in 30. min with a Fe:Cr(VI) molar ratio (MR) of 3, and 45% conversion with MR= 1 over the same period of time. The material exhibited an enhanced reactivity in comparison with other previously tested similar materials. The proposed mechanism involves an initial reduction of Cr(VI) to Cr(III) by reaction with Fe0 or Fe(II) on the particle surface or in solution (secondary pathway), followed by an arrest on Cr(VI) removal attributed to the passivation of the surface of the nanoparticles. Passivation was confirmed by Raman and X-ray photoelectron spectroscopies (XPS). Furthermore, XPS analysis demonstrated that Cr(III) is the only Cr species present in the external layer of the nanoparticles after the reaction. Raman analysis and XPS measurements performed after mild sputtering showed that nZVI exposed to Cr(VI) presented a structure, from outside to inside, of hydroxychromites→magnetite→Fe0. © 2014 Elsevier B.V.
Fil: Montesinos, Victor Nahuel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina
Fil: Quici, Natalia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica; Argentina
Fil: Halac, Emilia Beatriz. Comisión Nacional de Energía Atómica; Argentina
Fil: Leyva de Guglielmino, Ana Gabriela. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina. Universidad Nacional de San Martín. Escuela de Ciencia y Tecnología; Argentina
Fil: Custo, Graciela Susana. Comisión Nacional de Energía Atómica; Argentina
Fil: Bengió, Silvina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina
Fil: Zampieri, Guillermo Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
Fil: Litter, Marta Irene. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica; Argentina. Universidad Nacional de San Martín; Argentina
description Nanoscale zerovalent iron (nZVI) particles were successfully employed for Cr(VI) removal from aqueous solutions at pH 3. It was found that the capacity of the system increases with increasing nZVI dosage. Starting at 300. μM, a complete Cr(VI) conversion was achieved in 30. min with a Fe:Cr(VI) molar ratio (MR) of 3, and 45% conversion with MR= 1 over the same period of time. The material exhibited an enhanced reactivity in comparison with other previously tested similar materials. The proposed mechanism involves an initial reduction of Cr(VI) to Cr(III) by reaction with Fe0 or Fe(II) on the particle surface or in solution (secondary pathway), followed by an arrest on Cr(VI) removal attributed to the passivation of the surface of the nanoparticles. Passivation was confirmed by Raman and X-ray photoelectron spectroscopies (XPS). Furthermore, XPS analysis demonstrated that Cr(III) is the only Cr species present in the external layer of the nanoparticles after the reaction. Raman analysis and XPS measurements performed after mild sputtering showed that nZVI exposed to Cr(VI) presented a structure, from outside to inside, of hydroxychromites→magnetite→Fe0. © 2014 Elsevier B.V.
publishDate 2014
dc.date.none.fl_str_mv 2014-05-15
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/11336/39761
Montesinos, Victor Nahuel; Quici, Natalia; Halac, Emilia Beatriz; Leyva de Guglielmino, Ana Gabriela; Custo, Graciela Susana; et al.; Highly efficient removal of Cr(VI) from water with nanoparticulated zerovalent iron: Understanding the Fe(III)-Cr(III) passive outer layer structure; Elsevier Science Sa; Chemical Engineering Journal; 244; 15-5-2014; 569-575
1385-8947
CONICET Digital
CONICET
url http://hdl.handle.net/11336/39761
identifier_str_mv Montesinos, Victor Nahuel; Quici, Natalia; Halac, Emilia Beatriz; Leyva de Guglielmino, Ana Gabriela; Custo, Graciela Susana; et al.; Highly efficient removal of Cr(VI) from water with nanoparticulated zerovalent iron: Understanding the Fe(III)-Cr(III) passive outer layer structure; Elsevier Science Sa; Chemical Engineering Journal; 244; 15-5-2014; 569-575
1385-8947
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.cej.2014.01.093
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1385894714001181
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
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
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science Sa
publisher.none.fl_str_mv Elsevier Science Sa
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 13.13397

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