The adsorption data followed both the Langmuir and Freundlich isotherms and pseudo-second order kinetics. Maximum adsorption capacities as quantified by the Langmuir parameter qmax for HIPS was 5.01 mg/g, EPS 0.38 mg/g for Zn2+ and HIPS 6.80 mg/g, EPS 0.68 mg/g for Pb2+.