Abstract
ABSTRACT
An analytical solution for a two-site model is presented for simulating the movement of hazardous wastes through the vadose zone with first order nonequilibrium adsorption/desorption kinetics. The numerical solution of the existing model, known as VIP (Vadose zone Interactive Processes), is compared with the analytical solution to test the numerical algorithm. The maximum error in peak concentration between the analytical solution and the VIP model is less than seven percent. The results from both solutions show that the mass transfer rate coefficient κ (kappa) is one of the important parameters controlling dispersion in nonequilibrium adsorption/desorption kinetics; κ affects dispersion of the concentration distribution in the depth profiles as well as breakthrough curves.
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