Accumulation of solutes in the surface layers of soils.

摘要

Physical and mathematical models of mass transfer and ion sorption by swelling soils are proposed. The equation of mass transfer is similar to the telegraph equation and does not include a function (an isotherm) of material sorption. It is solved incombination with the equation of convective diffusion. The exact and approximate solutions of the equations of concentration and sorption of material in surface soil layers both inside the swelling particles and in filtration channels were found. The mechanism of accumulation of salt crystals in these layers is considered.