2022
DOI: 10.5194/adgeo-58-11-2022
|View full text |Cite
|
Sign up to set email alerts
|

Reactive transport simulations of uranium migration in the Opalinus Clay depend on ion speciation governed by underlying thermodynamic data

Abstract: Abstract. Safety assessments must demonstrate that radionuclides in potential disposal sites are retained within the containment providing rock zone. The impact of thermodynamic data on calculated migration lengths resulting from reactive transport simulations is quantified for the example of uranium in the hydrogeological system of the Opalinus Clay at Mont Terri. In this geochemical system, speciation is controlled by the calcite-carbonate-ion system. Aqueous uranium is mainly present as U(VI) as ternary com… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
3
2

Citation Types

2
14
0

Year Published

2023
2023
2025
2025

Publication Types

Select...
3

Relationship

1
2

Authors

Journals

citations
Cited by 3 publications
(16 citation statements)
references
References 18 publications
2
14
0
Order By: Relevance
“…The thermodynamic data set is based on the PSI/Nagra database version 12/07 (Thoenen et al, 2014) including the thermodynamic data for uranium published by the NEA (Grenthe et al, 2020) as well as a compilation of surface complexation data for the hydroxo-complexes of uranium to quantify sorption on the inherent clay minerals using the bottom-up approach (Marques Fernandes et al, 2015;Stockmann et al, 2017). This surface complexation data set was compiled in the context of an uranium sorption experiment (Joseph et al, 2013a) and has already been applied (Hennig et al, 2020;Hennig and Kühn, 2021a, b). Illite and montmorillonite are the cation exchange phases in the simulations, which are initially equilibrated with the pore water solution (Hennig et al, 2020).…”
Section: Methodsmentioning
confidence: 99%
See 4 more Smart Citations
“…The thermodynamic data set is based on the PSI/Nagra database version 12/07 (Thoenen et al, 2014) including the thermodynamic data for uranium published by the NEA (Grenthe et al, 2020) as well as a compilation of surface complexation data for the hydroxo-complexes of uranium to quantify sorption on the inherent clay minerals using the bottom-up approach (Marques Fernandes et al, 2015;Stockmann et al, 2017). This surface complexation data set was compiled in the context of an uranium sorption experiment (Joseph et al, 2013a) and has already been applied (Hennig et al, 2020;Hennig and Kühn, 2021a, b). Illite and montmorillonite are the cation exchange phases in the simulations, which are initially equilibrated with the pore water solution (Hennig et al, 2020).…”
Section: Methodsmentioning
confidence: 99%
“…This surface complexation data set was compiled in the context of an uranium sorption experiment (Joseph et al, 2013a) and has already been applied (Hennig et al, 2020;Hennig and Kühn, 2021a, b). Illite and montmorillonite are the cation exchange phases in the simulations, which are initially equilibrated with the pore water solution (Hennig et al, 2020). Further details on the integration of uranium sorption processes, all surface parameters and reactions as well as cation exchange reactions can be found in Table 1 of the supplement of Hennig et al (2020).…”
Section: Methodsmentioning
confidence: 99%
See 3 more Smart Citations