SSSAJ -- Zhou and Selim 65 (4): 1056 Figure IG6

Fig. 6. Simulated breakthrough results for a two-layered soil column under different layering orders (R1 $->$ R2 and R2 $->$ R1). Here R1 is for a nonreactive layer and R2 is for a reactive layer with kinetic adsorption with n = 0.3, 0.7, and 1.0, respectively. A second-type boundary condition (BC) was used at the interface.