Equilibrium, kinetic and thermodynamic studies for the purification of wastewater from Congo red using simple and low cost adsorbents

The kinetic study was also carried out by studying the adsorption process at different temperatures using these two adsorbents to find the rate of adsorption process, its mechanism and to determine different thermodynamic parameters. For this purpose, different kinetic models were used which include film diffusion, particle diffusion, intraparticle diffusion, Elovich, Lagergren pseudo first order, Lagergren pseudo second order, simple first order and second order equations.