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

Figure 2

Effective diffusion coefficients for dissolved gases in Boom Clay (a) and other clayey materials (b), fitted with expression (14). The diffusion coefficient D is either the diffusion coefficient D₀ in pure water or the effective diffusion coefficient in a porous medium.

(a)

(b)