increased in their absolute values with temperature (Akmil et al., 2005) This result suggested that a high temperature is favored for the adsorption of heavy metals on Banana peel, indicated a spontaneous adsorption process. The values of heat of adsorption, ΔH is positive for metals ion, indicated that the adsorption process of heavy metals on Banana peel was endothermic. A positive ΔS suggested that heavy metals were not stable on the adsorption sites of Banana peel probably due to the increase in translational energy of metals ion.