Influence of various factors on parameters of adsorption of Zn2+cations by meadow soil

Abstract

Abstract The effect of changing the range of introduced metal concentrations, the ratio of solid and liquid phases, and the combined presence of other metal ions in the solution on the absorption of Zn by the meadow soil was studied. As the range of applied concentrations expands and increases (up to 100 mM/L), there is a significant decrease in intensity of metal adsorption and an increase in the soil sorption capacity. It was found that with increasing dilution of the external solution (soil / solution ratio 1:10), the thermodynamic parameters of adsorption with respect to Zn increase. During the joint absorption of Zn with cations of other metals, the dominant process that affects the shape of the isotherm and the parameters of metal adsorption is their mutual competition. Competitive relationships of metal ions lead to their redistribution between different soil reaction centers.