aqueous solution was studied using the batch equilibrium method. Experiments were carried out as a function of pH and concentration of metal ions. It was shown that the maximum adsorption of 96.7% for Pb(II) occurred at an optimum pH of 5.5 whereas the maximum adsorption of 91.7% for Hg(II) and 80.8% for Cd(II) was observed at pH 6.0. The adsorption of metal ion proceeds predominently by the cation-exchange mechanism. Adsorption isothermal data could be interpreted by the Langmuir and Freundlich isotherm equations. Langmuir and Freundlich constants have been determined. Adsorption experiments were carried out to investigate the competitive effect on the uptake of metal ions from binary mixtures. Sheindorf - Rebhun - Sheintuch (SRS) model was used to study the competitive interactions for the adsorption of Pb - Hg, Pb - Cd and Cd - Hg mixtures by the adsorbent.