JRP 01-01

Partners

FZK

UPC

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Contact

Dr. Th. Schäfer
Forschungszentrum Karlsruhe-INE P.O. Box 3641 - 76021 Karlsruhe Germany
Phone +49 (0) 7247 82 5494
E-mail e-mail

Actinide interaction with colloids

Status

 
Terminated - Planned from September 2004 till March 2006

Goals

The goal of this joint research project is to investigate actinide interaction with clay colloids, derived from a natural bentonite. The static and dynamic experiments are focused on two aspects:

  • colloid filtration processes;
  • the kinetics of actinide-colloid interactions.

Expected results

The present experiments will provide an insight into colloid retention mechanisms in fractured host rock and under conditions where colloid relevance on the basis of the groundwater chemistry and existing knowledge is predicted to be very high.

The data are of considerable interest for the reasonable assessment of colloidal processes in nuclear waste repositories. They are also helpful to assess the long-term behaviour of clay type colloids in a natural aquifer.

Presentations

  • A. Delos, T. Schäfer, H. Geckeis, J. Guimera, J. Carrera, Th. Fanghänel (2005), "Colloid and radionuclide retention mechanisms in fractured rock under near-natural flow conditions", 10th International Conference on Chemistry and Migration Behaviour of Actinides and Fission Products in the Geosphere (Migration '05), Avignon, France, September 18-23, 2005. Book of Abstracts, p. 185.

Reports