Vol. 6, Issue 2, Part A (2024)

Fluoride in alkaline soils at pH 6.5 and above is almost completely fixed in soils as calcium fluoride, if sufficient calcium carbonate is available fluoride binds to clay by displacing hydroxide from the surface of the clay. The ion having very high CEC and is found at ease to bind by counter ion leaches easily in order to effect quality of soil and ground water. In this way the aim of this work was to study the adsorption of   on to the soil sample [ss] with different amount of adsorbate in the temperature range of 293K to 313K by using batch process method. Rate of adsorption was found nearest to Ist order reaction. Adsorption and desorption process run as complementary process gave equilibrium constant   which tends to give approach of thermodynamics parameters like enthalpy change, Gibbs free energy change, entropy changes respectively   besides with the help of mathematical modeling the kinetics and thermodynamic parameter were interpreted to make ease to understood with clear predictions, distribution classification and assumptions of the entire data's mutual relation.