Fig. 2

HTO through-diffusion (upper graph) and flux (lower graph) curves for cell Trac2, run 2 (circles) without pore space clogging (or reduction), and cells Prec2 and Prec3 (open and full triangles, respectively) while reducing porosity by celestite precipitation. The full line is the model without clogging (reduction). The dashed and dotted lines are obtained by running a reactive transport model taking into account the clogging (reduction) (see text for details), with a minimum porosity of 0.01 and 0.30, respectively.