Competitive effect of the metallic canister and clay barrier on the sorption of Eu3+ under subcritical conditions

An in depth knowledge and understanding of high activity radionuclide (HLRW) immobilization processes on the materials composing the engineered barrier (clay and metallic canister) is required to ensure the safety and the long-term performance of radioactive waste disposal procedures. Therefore, the...

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Autores: El Mrabet, Said, Castro Arroyo, Miguel Ángel, Hurtado Bermúdez, Santiago José, Orta Cuevas, María del Mar, Pazos, Mariana Carolina, Villa Alfageme, María
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2014
País:España
Institución:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/64473
Acceso en línea:http://hdl.handle.net/11441/64473
https://doi.org/10.1016/j.apgeochem.2013.10.014
Access Level:acceso abierto
Palabra clave:Metallic canister
Bentonite
Engineering barrier
Radionuclide waste
Actinide
Lanthanide
Rare earth elements
Silicates
Hydrothermal treatment
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spelling Competitive effect of the metallic canister and clay barrier on the sorption of Eu3+ under subcritical conditionsEl Mrabet, SaidCastro Arroyo, Miguel ÁngelHurtado Bermúdez, Santiago JoséOrta Cuevas, María del MarPazos, Mariana CarolinaVilla Alfageme, MaríaMetallic canisterBentoniteEngineering barrierRadionuclide wasteActinideLanthanideRare earth elementsSilicatesHydrothermal treatmentAn in depth knowledge and understanding of high activity radionuclide (HLRW) immobilization processes on the materials composing the engineered barrier (clay and metallic canister) is required to ensure the safety and the long-term performance of radioactive waste disposal procedures. Therefore, the aim of this study was to understand the mechanisms involved in the retention of Eu3+ by two components of the multibarrier system, the bentonite barrier and the canister. As such, a comparative study of the interaction of trivalent Eu3+, used to simulate trivalent actinides, with both bentonite and a metallic canister has been undertaken in this work. To this end, we designed a minireactor into which the bentonite was introduced and compacted. The minireactor-bentonite system was then submitted to a hydrothermal reaction with a 7.9×10-2M solution of Eu3+ at 300°C for 4.5days. SEM and XRD results revealed that both bentonite and the container were involved in the immobilization of europium by the formation of insoluble europium silicate phases. The presence of europium silicate adsorbed on the surface of the metallic canister indicates the competitive effect of both components of the engineered barrier (bentonite and metallic canister) in HLRW immobilization. These results suggested that the canister could play a role in the HLRW immobilization even during its corrosion process.Elsevier2014info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfapplication/pdfhttp://hdl.handle.net/11441/64473https://doi.org/10.1016/j.apgeochem.2013.10.014reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésApplied Geochemistry, 40, 25-31.http://dx.doi.org/10.1016/j.apgeochem.2013.10.014info:eu-repo/semantics/openAccessoai:idus.us.es:11441/644732026-06-17T12:51:07Z
dc.title.none.fl_str_mv Competitive effect of the metallic canister and clay barrier on the sorption of Eu3+ under subcritical conditions
title Competitive effect of the metallic canister and clay barrier on the sorption of Eu3+ under subcritical conditions
spellingShingle Competitive effect of the metallic canister and clay barrier on the sorption of Eu3+ under subcritical conditions
El Mrabet, Said
Metallic canister
Bentonite
Engineering barrier
Radionuclide waste
Actinide
Lanthanide
Rare earth elements
Silicates
Hydrothermal treatment
title_short Competitive effect of the metallic canister and clay barrier on the sorption of Eu3+ under subcritical conditions
title_full Competitive effect of the metallic canister and clay barrier on the sorption of Eu3+ under subcritical conditions
title_fullStr Competitive effect of the metallic canister and clay barrier on the sorption of Eu3+ under subcritical conditions
title_full_unstemmed Competitive effect of the metallic canister and clay barrier on the sorption of Eu3+ under subcritical conditions
title_sort Competitive effect of the metallic canister and clay barrier on the sorption of Eu3+ under subcritical conditions
dc.creator.none.fl_str_mv El Mrabet, Said
Castro Arroyo, Miguel Ángel
Hurtado Bermúdez, Santiago José
Orta Cuevas, María del Mar
Pazos, Mariana Carolina
Villa Alfageme, María
author El Mrabet, Said
author_facet El Mrabet, Said
Castro Arroyo, Miguel Ángel
Hurtado Bermúdez, Santiago José
Orta Cuevas, María del Mar
Pazos, Mariana Carolina
Villa Alfageme, María
author_role author
author2 Castro Arroyo, Miguel Ángel
Hurtado Bermúdez, Santiago José
Orta Cuevas, María del Mar
Pazos, Mariana Carolina
Villa Alfageme, María
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Metallic canister
Bentonite
Engineering barrier
Radionuclide waste
Actinide
Lanthanide
Rare earth elements
Silicates
Hydrothermal treatment
topic Metallic canister
Bentonite
Engineering barrier
Radionuclide waste
Actinide
Lanthanide
Rare earth elements
Silicates
Hydrothermal treatment
description An in depth knowledge and understanding of high activity radionuclide (HLRW) immobilization processes on the materials composing the engineered barrier (clay and metallic canister) is required to ensure the safety and the long-term performance of radioactive waste disposal procedures. Therefore, the aim of this study was to understand the mechanisms involved in the retention of Eu3+ by two components of the multibarrier system, the bentonite barrier and the canister. As such, a comparative study of the interaction of trivalent Eu3+, used to simulate trivalent actinides, with both bentonite and a metallic canister has been undertaken in this work. To this end, we designed a minireactor into which the bentonite was introduced and compacted. The minireactor-bentonite system was then submitted to a hydrothermal reaction with a 7.9×10-2M solution of Eu3+ at 300°C for 4.5days. SEM and XRD results revealed that both bentonite and the container were involved in the immobilization of europium by the formation of insoluble europium silicate phases. The presence of europium silicate adsorbed on the surface of the metallic canister indicates the competitive effect of both components of the engineered barrier (bentonite and metallic canister) in HLRW immobilization. These results suggested that the canister could play a role in the HLRW immobilization even during its corrosion process.
publishDate 2014
dc.date.none.fl_str_mv 2014
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11441/64473
https://doi.org/10.1016/j.apgeochem.2013.10.014
url http://hdl.handle.net/11441/64473
https://doi.org/10.1016/j.apgeochem.2013.10.014
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Applied Geochemistry, 40, 25-31.
http://dx.doi.org/10.1016/j.apgeochem.2013.10.014
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:idUS. Depósito de Investigación de la Universidad de Sevilla
instname:Universidad de Sevilla (US)
instname_str Universidad de Sevilla (US)
reponame_str idUS. Depósito de Investigación de la Universidad de Sevilla
collection idUS. Depósito de Investigación de la Universidad de Sevilla
repository.name.fl_str_mv
repository.mail.fl_str_mv
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