Preventing Uranium(VI) redissolution in water after treatment with zerovalent iron nanoparticles by passivation with chromium(VI)

Autores
Crespi, Julieta; Fabris, Guido Berdina; Halac, Emilia Beatriz; Leyva de Guglielmino, Ana Gabriela; Zampieri, Guillermo Enrique; Quici, Natalia
Año de publicación
2021
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
It has been proved that nanoscale zerovalent iron (nZVI) is efficient for a fast removal of U(VI) in the absence of dissolved oxygen. However, the reoxygenation of the system leads to the re-release of U(VI) to the solution. In this work, U(VI) removal by nZVI was studied and its redissolution was prevented by addition of Cr(VI) that produces the passivation of the nZVI surface. Starting at 0.25 mM of U(VI) under anoxic conditions, nZVI was added in a Fe(total):U(VI) molar ratio of 4 achieving a fast and complete U(VI) removal. After 0.5 h reaction, 0.33 mM Cr(VI) was added to the U(VI) system and reoxygenation of the system was allowed for 24 h. No re-release of U was observed, in contrast with the experiments performed in the absence of Cr(VI), where 16 % of U was redissolved after reoxygenation. Raman spectroscopy and X-ray diffraction analyses performed on the solids obtained after the experiments demonstrated the presence of magnetite, maghemite and Fe(0) in all the samples. X-ray photoelectron and energy disperse spectroscopies indicated that a larger amount of U was present in the nanoparticles coming from the experiment where Cr(VI) was added, compared with the experiments in the absence of Cr(VI). The proposed mechanism involves the reduction of U(VI) to U(IV) and its adsorption on the nanoparticles, followed by surface passivation produced by reduction of Cr(VI) to Cr(III), which prevents the reaction between oxygen and the adsorbed uranium.
Fil: Crespi, Julieta. Comisión Nacional de Energía Atómica. Gerencia del Área de Seguridad Nuclear y Ambiente. Gerencia de Química (CAC); Argentina. Universidad Nacional de San Martín. Instituto Sabato; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Fabris, Guido Berdina. Instituto Tecnológico de Buenos Aires. Departamento de Ingeniería Química; Argentina
Fil: Halac, Emilia Beatriz. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes. Gerencia de Investigación y Aplicaciones; Argentina
Fil: Leyva de Guglielmino, Ana Gabriela. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes. Gerencia de Investigación y Aplicaciones; Argentina
Fil: Zampieri, Guillermo Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche); Argentina
Fil: Quici, Natalia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Seguridad Nuclear y Ambiente. Gerencia de Química (CAC); Argentina
Materia
IRON NANOPARTICLES
URANIUM
CHROMIUM
REDISSOLUTION
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:11336/165749
Acceder
id CONICETDig_0344366ec129dbd63b20efebb4f901e2
oai_identifier_str oai:ri.conicet.gov.ar:11336/165749
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Preventing Uranium(VI) redissolution in water after treatment with zerovalent iron nanoparticles by passivation with chromium(VI)Crespi, JulietaFabris, Guido BerdinaHalac, Emilia BeatrizLeyva de Guglielmino, Ana GabrielaZampieri, Guillermo EnriqueQuici, NataliaIRON NANOPARTICLESURANIUMCHROMIUMREDISSOLUTIONhttps://purl.org/becyt/ford/2.10https://purl.org/becyt/ford/2It has been proved that nanoscale zerovalent iron (nZVI) is efficient for a fast removal of U(VI) in the absence of dissolved oxygen. However, the reoxygenation of the system leads to the re-release of U(VI) to the solution. In this work, U(VI) removal by nZVI was studied and its redissolution was prevented by addition of Cr(VI) that produces the passivation of the nZVI surface. Starting at 0.25 mM of U(VI) under anoxic conditions, nZVI was added in a Fe(total):U(VI) molar ratio of 4 achieving a fast and complete U(VI) removal. After 0.5 h reaction, 0.33 mM Cr(VI) was added to the U(VI) system and reoxygenation of the system was allowed for 24 h. No re-release of U was observed, in contrast with the experiments performed in the absence of Cr(VI), where 16 % of U was redissolved after reoxygenation. Raman spectroscopy and X-ray diffraction analyses performed on the solids obtained after the experiments demonstrated the presence of magnetite, maghemite and Fe(0) in all the samples. X-ray photoelectron and energy disperse spectroscopies indicated that a larger amount of U was present in the nanoparticles coming from the experiment where Cr(VI) was added, compared with the experiments in the absence of Cr(VI). The proposed mechanism involves the reduction of U(VI) to U(IV) and its adsorption on the nanoparticles, followed by surface passivation produced by reduction of Cr(VI) to Cr(III), which prevents the reaction between oxygen and the adsorbed uranium.Fil: Crespi, Julieta. Comisión Nacional de Energía Atómica. Gerencia del Área de Seguridad Nuclear y Ambiente. Gerencia de Química (CAC); Argentina. Universidad Nacional de San Martín. Instituto Sabato; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Fabris, Guido Berdina. Instituto Tecnológico de Buenos Aires. Departamento de Ingeniería Química; ArgentinaFil: Halac, Emilia Beatriz. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes. Gerencia de Investigación y Aplicaciones; ArgentinaFil: Leyva de Guglielmino, Ana Gabriela. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes. Gerencia de Investigación y Aplicaciones; ArgentinaFil: Zampieri, Guillermo Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche); ArgentinaFil: Quici, Natalia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Seguridad Nuclear y Ambiente. Gerencia de Química (CAC); ArgentinaItalian Association of Chemical Engineering2021-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/165749Crespi, Julieta; Fabris, Guido Berdina; Halac, Emilia Beatriz; Leyva de Guglielmino, Ana Gabriela; Zampieri, Guillermo Enrique; et al.; Preventing Uranium(VI) redissolution in water after treatment with zerovalent iron nanoparticles by passivation with chromium(VI); Italian Association of Chemical Engineering; Chemical Engineering Transactions; 86; 6-2021; 1489-1494978-88-95608-84-62283-9216CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.cetjournal.it/cet/21/86/249.pdfinfo:eu-repo/semantics/altIdentifier/doi/10.3303/CET2186249info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:04:09Zoai:ri.conicet.gov.ar:11336/165749instacron: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 10:04:09.521CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Preventing Uranium(VI) redissolution in water after treatment with zerovalent iron nanoparticles by passivation with chromium(VI)
title Preventing Uranium(VI) redissolution in water after treatment with zerovalent iron nanoparticles by passivation with chromium(VI)
spellingShingle Preventing Uranium(VI) redissolution in water after treatment with zerovalent iron nanoparticles by passivation with chromium(VI)
Crespi, Julieta
IRON NANOPARTICLES
URANIUM
CHROMIUM
REDISSOLUTION
title_short Preventing Uranium(VI) redissolution in water after treatment with zerovalent iron nanoparticles by passivation with chromium(VI)
title_full Preventing Uranium(VI) redissolution in water after treatment with zerovalent iron nanoparticles by passivation with chromium(VI)
title_fullStr Preventing Uranium(VI) redissolution in water after treatment with zerovalent iron nanoparticles by passivation with chromium(VI)
title_full_unstemmed Preventing Uranium(VI) redissolution in water after treatment with zerovalent iron nanoparticles by passivation with chromium(VI)
title_sort Preventing Uranium(VI) redissolution in water after treatment with zerovalent iron nanoparticles by passivation with chromium(VI)
dc.creator.none.fl_str_mv Crespi, Julieta
Fabris, Guido Berdina
Halac, Emilia Beatriz
Leyva de Guglielmino, Ana Gabriela
Zampieri, Guillermo Enrique
Quici, Natalia
author Crespi, Julieta
author_facet Crespi, Julieta
Fabris, Guido Berdina
Halac, Emilia Beatriz
Leyva de Guglielmino, Ana Gabriela
Zampieri, Guillermo Enrique
Quici, Natalia
author_role author
author2 Fabris, Guido Berdina
Halac, Emilia Beatriz
Leyva de Guglielmino, Ana Gabriela
Zampieri, Guillermo Enrique
Quici, Natalia
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv IRON NANOPARTICLES
URANIUM
CHROMIUM
REDISSOLUTION
topic IRON NANOPARTICLES
URANIUM
CHROMIUM
REDISSOLUTION
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.10
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv It has been proved that nanoscale zerovalent iron (nZVI) is efficient for a fast removal of U(VI) in the absence of dissolved oxygen. However, the reoxygenation of the system leads to the re-release of U(VI) to the solution. In this work, U(VI) removal by nZVI was studied and its redissolution was prevented by addition of Cr(VI) that produces the passivation of the nZVI surface. Starting at 0.25 mM of U(VI) under anoxic conditions, nZVI was added in a Fe(total):U(VI) molar ratio of 4 achieving a fast and complete U(VI) removal. After 0.5 h reaction, 0.33 mM Cr(VI) was added to the U(VI) system and reoxygenation of the system was allowed for 24 h. No re-release of U was observed, in contrast with the experiments performed in the absence of Cr(VI), where 16 % of U was redissolved after reoxygenation. Raman spectroscopy and X-ray diffraction analyses performed on the solids obtained after the experiments demonstrated the presence of magnetite, maghemite and Fe(0) in all the samples. X-ray photoelectron and energy disperse spectroscopies indicated that a larger amount of U was present in the nanoparticles coming from the experiment where Cr(VI) was added, compared with the experiments in the absence of Cr(VI). The proposed mechanism involves the reduction of U(VI) to U(IV) and its adsorption on the nanoparticles, followed by surface passivation produced by reduction of Cr(VI) to Cr(III), which prevents the reaction between oxygen and the adsorbed uranium.
Fil: Crespi, Julieta. Comisión Nacional de Energía Atómica. Gerencia del Área de Seguridad Nuclear y Ambiente. Gerencia de Química (CAC); Argentina. Universidad Nacional de San Martín. Instituto Sabato; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Fabris, Guido Berdina. Instituto Tecnológico de Buenos Aires. Departamento de Ingeniería Química; Argentina
Fil: Halac, Emilia Beatriz. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes. Gerencia de Investigación y Aplicaciones; Argentina
Fil: Leyva de Guglielmino, Ana Gabriela. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes. Gerencia de Investigación y Aplicaciones; Argentina
Fil: Zampieri, Guillermo Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche); Argentina
Fil: Quici, Natalia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Seguridad Nuclear y Ambiente. Gerencia de Química (CAC); Argentina
description It has been proved that nanoscale zerovalent iron (nZVI) is efficient for a fast removal of U(VI) in the absence of dissolved oxygen. However, the reoxygenation of the system leads to the re-release of U(VI) to the solution. In this work, U(VI) removal by nZVI was studied and its redissolution was prevented by addition of Cr(VI) that produces the passivation of the nZVI surface. Starting at 0.25 mM of U(VI) under anoxic conditions, nZVI was added in a Fe(total):U(VI) molar ratio of 4 achieving a fast and complete U(VI) removal. After 0.5 h reaction, 0.33 mM Cr(VI) was added to the U(VI) system and reoxygenation of the system was allowed for 24 h. No re-release of U was observed, in contrast with the experiments performed in the absence of Cr(VI), where 16 % of U was redissolved after reoxygenation. Raman spectroscopy and X-ray diffraction analyses performed on the solids obtained after the experiments demonstrated the presence of magnetite, maghemite and Fe(0) in all the samples. X-ray photoelectron and energy disperse spectroscopies indicated that a larger amount of U was present in the nanoparticles coming from the experiment where Cr(VI) was added, compared with the experiments in the absence of Cr(VI). The proposed mechanism involves the reduction of U(VI) to U(IV) and its adsorption on the nanoparticles, followed by surface passivation produced by reduction of Cr(VI) to Cr(III), which prevents the reaction between oxygen and the adsorbed uranium.
publishDate 2021
dc.date.none.fl_str_mv 2021-06
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/11336/165749
Crespi, Julieta; Fabris, Guido Berdina; Halac, Emilia Beatriz; Leyva de Guglielmino, Ana Gabriela; Zampieri, Guillermo Enrique; et al.; Preventing Uranium(VI) redissolution in water after treatment with zerovalent iron nanoparticles by passivation with chromium(VI); Italian Association of Chemical Engineering; Chemical Engineering Transactions; 86; 6-2021; 1489-1494
978-88-95608-84-6
2283-9216
CONICET Digital
CONICET
url http://hdl.handle.net/11336/165749
identifier_str_mv Crespi, Julieta; Fabris, Guido Berdina; Halac, Emilia Beatriz; Leyva de Guglielmino, Ana Gabriela; Zampieri, Guillermo Enrique; et al.; Preventing Uranium(VI) redissolution in water after treatment with zerovalent iron nanoparticles by passivation with chromium(VI); Italian Association of Chemical Engineering; Chemical Engineering Transactions; 86; 6-2021; 1489-1494
978-88-95608-84-6
2283-9216
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.cetjournal.it/cet/21/86/249.pdf
info:eu-repo/semantics/altIdentifier/doi/10.3303/CET2186249
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
dc.publisher.none.fl_str_mv Italian Association of Chemical Engineering
publisher.none.fl_str_mv Italian Association of Chemical Engineering
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
_version_ 1842269840659709952
score 13.13397

Publicaciones similares