Retention of Cs in Boom Clay: Comparison of data from batch sorption tests and diffusion experiments on intact clay cores

Measuring the effective diffusion coefficient of dissolved hydrogen in saturated Boom Clay

“…General mineralogical and physical properties of the Boom Clay are described elsewhere (Maes et al, 2008).…”

Diffusion Properties of Carbonated Caprocks from the Paris Basin

“…If the solution is contained in the voids of a porous medium, this equation transforms to: (6) where J → now is the flux density of the species of interest per unit surface of porous medium and c the concentration of the tagged isotope per unit volume of pore solution (moles per cubic meter); D e is strictly speaking a diffusion tensor which we shall call the effective diffusion tensor. This law is given here as a "phenomenological" law, but it can be formally derived from diffusion equations at the pore scale under not very stringent assumptions (see for instance [4]).…”

“…This subject is quite important for the safety of geological nuclear waste depositories and has been investigated in some detail. To give a few orders of magnitude, typical values for cations might range from less than 10 for Na + (deduced from [5]), to 10 3 -10 4 for Cs + [6]. The case of anions is more complicated and will be examined in more detail in Section 4.…”

The Dependency of Diffusion Coefficients and Geometric Factor on the Size of the Diffusing Molecule: Observations for Different Clay-Based Materials

“…The use of clay-based materials as engineered barriers is studied in, for example, Switzerland [4], France [5], and Sweden [6]. The clays under consideration all have a high sorption capacity for many radionuclides [7][8][9], a low hydraulic conductivity [10,11], and interesting self-sealing properties [12,13].…”