Kinetic and thermodynamic studies for the adsorption of Nickel (II) by Basil seeds in aqueous solutions

Environmental pollution as a result of a heavy metal presence led to serious health problems. Inthis study, the adsorption by swollen Basil seeds were determined. The adsorption behavior of Basil seeds with respect to Nickel (II) has been studies by batch method to consider itsapplication in this field.The effects of various experimental parameters like contact time, dosage of Basil seeds, initial concentration of the metal ion, pH of solution, and temperature have been investigated .The removal percentage is a pH dependent and decrease with increase intemperature, The best removal were at 200C. The equilibrium adsorption experimental data were found to fit Freundlich isotherms for Nickel (II). The pseudo-first and second order kineticmodel both fitted the kinetic.The thermodynamic parameters, (Δ0G) was found to be positive and become negative at low temperature (below 100C), Δ0H is negative that means exothermic adsorption process and Δ0S is negative also which indicate the increase in the order at the solidsolution interface