A Study on the Kinetics and Thermodynamics of the Adsorption of Co~(2+) Ions by Macroporous Resin D001

The adsorption kinetics and thermodynamics of Co2+ in solution is studied.Kinetic studies indicate that Co2+ adsorption onto D001 resin conforms to pseudo-first-order equation and pseudo-second-order equation.The adsorption is controlled by pore diffusion.In the experimental temperature,thermodynamic studies indicate that Co2+ adsorption onto D001 resin conforms to Langmuir adsorption isotherm equation.Enthalpy of adsorption(ΔHθ) value is 11.643 kJ/mol that indicates the radiative nature of the adsorption process.A decrease of Gibbs free energy(ΔGθ) with increasing temperature also indicates the spontaneous nature of the process.The entropy of ΔSθ value of 0.093 kJ/(mol·K) shows the increased randomness at the solid-solution interface during adsorption.