Abstract
A given chemical may react at different rates with various soil constituents and be involved in several kinds of reactions. A combination of equilibrium and kinetic adsorption models is hypothesized to describe the nature of the overall reaction. An analytical solution to the one‐dimensional convectivedispersive transport equation with a combination linear Freundlich isotherm and first‐order reversible kinetic adsorption model is developed. The individual and combined effects of the model parameters on the breakthrough curves and retention profiles are examined. The combination equilibrium‐kinetic model is shown to be applicable to pesticide, nutrient, and metal transport in soils.
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