The effect of carbon particle size on the removal efficiency of Zn(II), Co(II), Pb(II) and Fe(III) from aqueous solution was studied within particle size range 30–200 mesh at pH 5.5 and 25 1 8C. The removal of Zn(II), Co(II), Pb(II) and Fe(III) was found to increase from 60% to 99% as the sorbents particle size was decreased from 200 to 30 mesh. The higher sorption with smaller sorbent particle size may be attributed to the fact that smaller particles provide a larger surface area. Hence, carbon samples of particle size 30 mesh has been chosen for further experiments.