Articles | Volume 2
https://doi.org/10.5194/sand-2-161-2023
https://doi.org/10.5194/sand-2-161-2023
Conference Abstract
 | 
06 Sep 2023
Conference Abstract |  | 06 Sep 2023

Retention of trivalent actinides (Am, Cm) and lanthanides (Eu) by Ca feldspars

Jessica Lessing, Julia Neumann, Frank Bok, Johannes Lützenkirchen, Vinzenz Brendler, Moritz Schmidt, and Thorsten Stumpf

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The immobilization of trivalent actinides (Am, Cm) and their less toxic homologue (Eu) in feldspar, a very common mineral in our earth crust, was studied by sorption experiments and spectroscopic studies. The speciation was identified and used to gain thermodynamic parameters to develop a surface complexation model. To sum up, feldspar, a main component of crystalline rock, is suitable for retaining radionuclides in a deep radioactive waste repository.