ROLE OF SURFACE AREA IN KINETICS CADMIUM SORPTION IN CALCAREOUS SOILS | Asian Journal of Plant ....

The chemical behaviour of the surface chemistry and its kinetic reactions are primarily determined by these parameters, which are intimately related to their unique soil properties as well as their mineralogical characterization. This study used a kinetic approach to assess the impact of some chemical parameters of five calcareous soils (Typic calcids), which differed in total and active CaCO3, on cadmium (Cd2+) sorption characterisation. When compared to other models investigated, the empirical modified Freundlich (power function) and Elovich equations better described the kinetic data. Through the use of the simple correlation coefficient (r), multiple and stepwise regression analysis, the rate of Cd2+ sorption on used soils was substantially positively linked with the specific surface area of used soils. Other soil features influencing Cd+2 retention in utilised soils included % of clay content, organic matter (OM), and total Cd2+ content; these qualities significantly impacted differences in rate constants of kinetic parameters of best fitted models as well as capacity factors of used models. The active CaCO3 content that best fit the specific surface area was negatively correlated and controlled the fluctuations of kinetic parameters such as rate and capacity factors in kinetic models. Adsorption followed by surface precipitation on active CaCO3 surfaces could be the major mechanisms controlling Cd2+ retention and release, according to the findings.

Please see the link :- https://www.ikprress.org/index.php/AJOPSS/article/view/6690