Details zur Publikation |
Kategorie | Textpublikation |
Referenztyp | Zeitschriften |
DOI | 10.1016/j.apgeochem.2009.04.001 |
Titel (primär) | Modeling reactive transport in non-ideal aqueous-solid solution system |
Autor | Shao, H.B.
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Quelle | Applied Geochemistry |
Erscheinungsjahr | 2009 |
Department | ENVINF |
Band/Volume | 24 |
Heft | 7 |
Seite von | 1287 |
Seite bis | 1300 |
Sprache | englisch |
Abstract | The numerical simulation of reactive mass transport processes in complex geochemical environments is an important tool for the performance assessment of future waste repositories. A new combination of the multi-component mass transport code GeoSys/RockFlow and the Gibbs Energy Minimization (GEM) equilibrium solver GEM-Selektor is used to calculate the accurate equilibrium of multiple non-ideal solid solutions which are important for the immobilization of radionuclides such as Ra. The coupled code is verified by a widely used benchmark of dissolution-precipitation in a calcite-dolomite system. A more complex application shown in this paper is the transport of Ra in the near-field of a nuclear waste repository. Depending on the initial inventories of Sr, Ba and sulfate, non-ideal sulfate and carbonate solid solutions can fix mobile Ra cations. Due to the complex geochemical interactions, the reactive transport simulations can describe the migration of Ra in a much more realistic way than using the traditional linear K-D approach only. |
dauerhafte UFZ-Verlinkung | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=622 |
Shao, H.B., Dmytrieva, S.V., Kolditz, O., Kulik, D.A., Pfingsten, W., Kosakowski, G. (2009): Modeling reactive transport in non-ideal aqueous-solid solution system Appl. Geochem. 24 (7), 1287 - 1300 10.1016/j.apgeochem.2009.04.001 |