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...
| Authors: | ; ; ; ; ; |
|---|---|
| Format: | Article |
| Status: | Accepted version |
| Publication date: | 2014 |
| Country: | España |
| Institution: | Universidad de Sevilla (US) |
| Repository: | idUS. Depósito de Investigación de la Universidad de Sevilla |
| OAI Identifier: | oai:idus.us.es:11441/64473 |
| Online Access: | http://hdl.handle.net/11441/64473 https://doi.org/10.1016/j.apgeochem.2013.10.014 |
| Access Level: | Open access |
| Keyword: | Metallic canister Bentonite Engineering barrier Radionuclide waste Actinide Lanthanide Rare earth elements Silicates Hydrothermal treatment |
| _version_ | 1878738866128551936 |
|---|---|
| author | El Mrabet, Said |
| 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 |
| author_browse | Castro Arroyo, Miguel Ángel El Mrabet, Said Hurtado Bermúdez, Santiago José Orta Cuevas, María del Mar Pazos, Mariana Carolina Villa Alfageme, María |
| 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 |
| collection | idUS. Depósito de Investigación de la Universidad de Sevilla |
| 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. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | ES_b69c876e822e352a073d18d1b01ac002 |
| institution | Universidad de Sevilla (US) |
| instname_str | Universidad de Sevilla (US) |
| network_acronym_str | ES |
| network_name_str | España |
| oai_identifier_str | oai:idus.us.es:11441/64473 |
| publishDate | 2014 |
| publishDateSort | 2014 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| reponame_str | idUS. Depósito de Investigación de la Universidad de Sevilla |
| spelling | Competitive effect of the metallic canister and clay barrier on the sorption of Eu3+ under subcritical conditions El Mrabet, Said Castro Arroyo, Miguel Ángel Hurtado Bermúdez, Santiago José Orta Cuevas, María del Mar Pazos, Mariana Carolina Villa Alfageme, María Metallic canister Bentonite Engineering barrier Radionuclide waste Actinide Lanthanide Rare earth elements Silicates Hydrothermal treatment 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. Elsevier http://hdl.handle.net/11441/64473 https://doi.org/10.1016/j.apgeochem.2013.10.014 |
| 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 |
| status_str | acceptedVersion |
| title | 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_short | 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 |
| topic | Metallic canister Bentonite Engineering barrier Radionuclide waste Actinide Lanthanide Rare earth elements Silicates Hydrothermal treatment |
| topic_facet | Metallic canister Bentonite Engineering barrier Radionuclide waste Actinide Lanthanide Rare earth elements Silicates Hydrothermal treatment |
| url | http://hdl.handle.net/11441/64473 https://doi.org/10.1016/j.apgeochem.2013.10.014 |