Retention of cesium and strontium by uranophane, Ca(UO2)2(SiO3OH)2·5H2O
This work determines the capacity of uranophane, one of the long-term uranyl secondary solid phases formed on the spent nuclear fuel (SNF), to retain radionuclides (cesium and strontium) released during the dissolution of the SNF. Sorption was fast in both cases, and uranophane had a high sorption c...
| Autores: | , , , |
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| Tipo de documento: | artigo |
| Data de publicação: | 2018 |
| País: | España |
| Recursos: | Universitat Politècnica de Catalunya (UPC) |
| Repositório: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglês |
| OAI Identifier: | oai:upcommons.upc.edu:2117/121266 |
| Acesso em linha: | https://hdl.handle.net/2117/121266 https://dx.doi.org/10.1016/j.jhazmat.2018.04.051 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Spent reactor fuels Uranophane Strontium Cesium Sorption Spent nuclear fuel Combustibles nuclears gastats Àrees temàtiques de la UPC::Enginyeria química |
| Resumo: | This work determines the capacity of uranophane, one of the long-term uranyl secondary solid phases formed on the spent nuclear fuel (SNF), to retain radionuclides (cesium and strontium) released during the dissolution of the SNF. Sorption was fast in both cases, and uranophane had a high sorption capacity for both radionuclides (maximum sorption capacities of 1.53·10-5¿mol¿m-2 for cesium and 3.45·10-3¿mol¿m-2 for strontium). The high sorption capacity of uranophane highlights the importance of the formation of uranyl silicates as secondary phases during the SNF dissolution, especially in retaining the release of radionuclides not retarded by other mechanisms such as precipitation. |
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