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, Orta, M. Mar, Pazos, M. Carolina, Villa-Alfageme, María, Alba, María D.
Tipo de recurso: artículo
Fecha de publicación:2014
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/97151
Acceso en línea:http://hdl.handle.net/10261/97151
Access Level:acceso abierto
Palabra clave:Metallic canister
Bentonite
Radionuclide waste, 8 actinide
Lanthanide, Rare earth elements, Silicates, Hydrothermal treatment
Engineering barrier
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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, SantiagoOrta, M. MarPazos, M. CarolinaVilla-Alfageme, MaríaAlba, María D.Metallic canisterBentoniteRadionuclide waste, 8 actinideLanthanide, Rare earth elements, Silicates, Hydrothermal treatmentEngineering barrierAn 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. © 2013 Elsevier Ltd.Peer ReviewedPergamon Press2014201420142014info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/97151reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglésinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/971512026-05-22T06:33:51Z
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
Radionuclide waste, 8 actinide
Lanthanide, Rare earth elements, Silicates, Hydrothermal treatment
Engineering barrier
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
Orta, M. Mar
Pazos, M. Carolina
Villa-Alfageme, María
Alba, María D.
author El Mrabet, Said
author_facet El Mrabet, Said
Castro Arroyo, Miguel Ángel
Hurtado-Bermúdez, Santiago
Orta, M. Mar
Pazos, M. Carolina
Villa-Alfageme, María
Alba, María D.
author_role author
author2 Castro Arroyo, Miguel Ángel
Hurtado-Bermúdez, Santiago
Orta, M. Mar
Pazos, M. Carolina
Villa-Alfageme, María
Alba, María D.
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Metallic canister
Bentonite
Radionuclide waste, 8 actinide
Lanthanide, Rare earth elements, Silicates, Hydrothermal treatment
Engineering barrier
topic Metallic canister
Bentonite
Radionuclide waste, 8 actinide
Lanthanide, Rare earth elements, Silicates, Hydrothermal treatment
Engineering barrier
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. © 2013 Elsevier Ltd.
publishDate 2014
dc.date.none.fl_str_mv 2014
2014
2014
2014
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/97151
url http://hdl.handle.net/10261/97151
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Pergamon Press
publisher.none.fl_str_mv Pergamon Press
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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