Abstract
To study the pollution of the ground by electrolytes, their adsorption to and desorption from soil particles need to be understood. In this study, batch tests were conducted to elucidate the mechanisms of adsorption and desorption; and the adsorption, desorption and exchange reactions of electrolytes were investigated using an electric diffuse double layer model proposed by Stern. The study revealed the concentration dependency of the adsorption and desorption mechanisms, factors that caused chemical hysteresis, and effects of soil acidity on adsorption and desorption properties. The authors formulated an equation for calculating the amounts of electrolytes adsorbed and desorbed based on the concentration dependency of the adsorption and desorption mechanisms, which was shown to almost perfectly reproduce the adsorption isothermal curve during increments and drops of electrolyte concentration.
