ACCUMULATION OF SOLUTES IN THE SURFACE-LAYERS OF SOILS

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