A Carbonaceous adsorbent prepared from an indigenous waste by acid treatment was tested for its efficiency in removing copper ion. The parameters studied include agitation time, initial copper ion concentration, carbon dose, pH and temperature. The adsorption followed first order equation and the rate is mainly controlled by intraparticle diffusion. Freundlich and Langmuir isotherm models were applied to the equilibrium data. The adsorption capacity (Qm) obtained from the Langmuir isotherm plots were 25.062, 26.737, 28.248 and 29.761 mg/g respectively at an initial pH of 7.0 at 30, 40, 50 and 60 C. The temperature variation study showed that the copper ion adsorption is endothermic and spontaneous with increased randomness at the solid solution interface. Significant effect on adsorption was observed on varying the pH of the copper ion solutions. Almost 80 % removal of copper ion was observed at 60 0 C. The Freundlich and Langmuir isotherms obtained, positive ΔH0 value, pH dependent results and desorption of metal ion in mineral acid suggest that the adsorption of copper ion on PSC involves physisorption mechanism.