Advances in Geosciences
Advances in Geosciences
ADGEO
Articles | Volume 67
Articles | Volume 67
https://doi.org/10.5194/adgeo-67-161-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/adgeo-67-161-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 67
12 Feb 2026
 | 12 Feb 2026

Pore water or groundwater chemistry: what governs uranium migration in Opalinus Clay?

Tim Schöne and Theresa Hennig

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Short summary
We studied how the chemical composition of water in rocks affects the movement of uranium, which is important for the safety of nuclear waste disposal sites. Using computer models, we found that water chemistry inside the host rock for the waste is more decisive for the transport of uranium than groundwater chemistry in adjacent rocks. These findings help improve site selection for a disposal site by indicating which conditions are suitable and less suitable to safely isolate radioactive waste.
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