Lump Activated Carbon(LAC) was prepared with coal based granular activated carbon(GAC) and Urea resin adhesive which is made into urea and formaldehyde aqueous solution. The adsorption characteristics of GAC and LAC adsorbents were tested for the iodine and methylene blue values and investigated the effect of pH and adsorption isotherm for heavy metal ions such as Hg(II), Pb(II), Cu(II), Cr(VI). The iodine number of GAC and LAC was 1,320 and 999 mg/g, methylene blue number was 150 and 122mg/g, respectively. In the adsorption characteristic of heavy metal ions on pH range tested, adsorption tendency of Hg(II), Pb(II), Cu(II) had similar properties to GAC and adsorptivity of Cr(VI) was better than that GAC. The adsorption equilibrium of Cr(VI) on GAC and LAC was fitted to the Freundlich isotherm and the other ions were fitted to the Langmuir isotherm.