Mechanisms of Adsorption of Ammonium Ions (As Fertilizers) on the Soils Surrounding Lake Al-Sin on the Syrian Coast

Abstract

The main objective of this research is to investigate the ability of the soil components surrounding Lake Al-Sin to adsorb ammonium ions (as fertilizers). The results showed variations in the ammonium ion adsorption values depending on the study sites, which included changes in the soil properties, which led to a difference in the exchange capacity values (as an indication of the adsorption capacity and its type), as the maximum adsorption capacity (qmax) values for ammonium ions ranged within the range (11.06 - 38.27 mg/g).

       When studying adsorption isotherms, which represent the relationship between the amount of adsorbed material on a surface and the concentration of the adsorbed material at equilibrium and at a certain temperature, it was found that they are in good agreement with the Freundlich model, with a correlation coefficient ranging within the range (0.90-0.99), This confirms that the resulting absorption is absorption on the heterogeneous (energy) centers of the surface of the absorbent material.

        As a result of the statistical study that dealt with the correlation coefficients between the physical and chemical properties of the soil components in the study sites and the adsorption properties of ammonium ions, it was observed that the maximum adsorption capacity (q_max), as an indication of the maximum adsorption of ammonium ions, is related to the following variables: soil components (clay, oxides, presence of zeolite components, and soil pH...).