Retention of cesium and strontium by uranophane, Ca(UO2)2(SiO3OH)2•5H2O

JOURNAL OF HAZARDOUS MATERIALS

卷:353

Article

Espriu-Gascon, Alexandra¹  Gimenez, Javier¹  Casas, Ignasi¹  de Pablo, Joan^1,2 

[1] Univ Politecn Cataluna, Dept Chem Engn, Barcelona Res Ctr Multiscale Sci & Engn, Eduard Maristany,10-14, Barcelona 08019, Spain

[2] Fundacio CTM Ctr Tecnol, Placa Ciencia 2, E-08243 Manresa, Spain

关键词: Uranophane;    Strontium;    Cesium;    Sorption;    Spent nuclear fuel;   

DOI  :  10.1016/j.jhazmat.2018.04.051

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

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