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Accueil > Équipes > Transferts Réactifs dans les Hydrosystèmes Anthropisés - TReHa > Résultats scientifiques de l’équipe TreHa

Numerical modelling of interactions between fluids and complex mineral phases

publié le , mis à jour le

Key-points
Fluid-rock interaction modellings in three directions : (1) coupled transfer-reaction modellings, (2) simulation of nucleation and growth of mineral phases, (3) introduction of biogeochemical processes.

Steps
Developping a coupled model with all the trumps of the geochemical model, applying the kinetics of crystal nucleation and growth, introducing a biogeochemical approach of bacterial effect on water-rock interaction processes.

Results
Simulation (KIRMAT) of reactive transfers of fluids in engineered clay barriers (100 000 years), in the Rhine graben aquifer (1 century), and in a granitic watershed (years). Simulation (NANOKIN) of granite alteration (25°C to 150°C).

Figure : Simulation of the evolution of an engineered barrier of bentonite between the geological environment (COX : Callovo-oxfordian) and a corroded steel container.

Perspectives
Bio-Kindis and Bio-Kirmat will be operating early 2012 : microbial activity controls directly the redox processes with feed-back effects (life and death of bacterias)

Persons and partners involved
Bertrand Fritz, DR CNRS ; Gwenael Imfeld, CR CNRS ; Alain Clément, IR CNRS ; Yann Lucas, MdC, University of Strasbourg ;
Partners : Claudine Noguera, DR CNRS, INSP Paris ; Alejandro MAAS, Prof., University of Santiago, Chili, UMI CNRS ; Veronica Gautier, Ing, BioSigma, Santiago, Chile.

Financial support
ANR P Nano (2007-2010, project SIMINOX), Industrial contract with BioSigma, Santiago, Chile

References
Fritz B., Clément A., Amal Y., Noguera C.(2009). Geochimica et Cosmochim. Acta. 73, 1340-1358. Doi : 10.1016/j.gca.2008.11.043.
Marty N., Fritz B., Clément A. and Michau N.(2010). Applied Clay Sci.,47,1-2, 82-90.
Noguera C., Fritz B., Clément A. and Amal Y.(2010). . Chem Geol., 269, 89-99.
Fritz B. , Jacquot B., Jacquemont B., Baldeyrou-Bailly A. ,Rosener M. and Vidal O. (2010). CR Geoscience, 342, 653-667.
Fritz B. and Gérard A. (2010). CR Geoscience, 342, 493-501.
Lucas Y., Schmitt A.D., Chabaux F., Clément A., Fritz B., Durand S. and Elsass Ph. (2010). Applied Geochemistry, 25, 1644-1663.
Noguera C., Fritz B. and Clément A. (2011) Geochimica et Cosmochimica Acta, 75, Issue 12, 3402-3418.
Lu C., Samper J., Fritz B., Clement A., Montenegro L.(2011). Physics and Chemistry of the Earth, 36,1661,1668.
Samper J., Naves A., Lu C. , Li Y., Fritz B. and Clement A. (2011). Physics and Chemistry of the Earth 36,1714,1720.