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FIG. 3. Conceptual chemical nonequilibrium models for reactive solute transport. In the plots, 
is the water content, mo and im in (d) are water contents of the mobile and immobile flow regions, respectively; M and F in (e) are water contents of the matrix and macropore (fracture) regions, respectively; c are concentrations of the corresponding regions, se are sorbed concentrations in equilibrium with the liquid concentrations of the corresponding regions, and sk are kinetically sorbed solute concentrations of the corresponding regions.
