Abstract
We examined the adsorption behavior of each metal ions (Pb(II), Cu(II), Cr(III)) for withered leaves of zelkova and activated carbon. We fed crushed leaves or activated carbon (AC) into aqueous solution of each metal ions for 2 hours. Then, we filtered the solutions and analyzed with use of inductively coupled plasma emission spectrometry (ICP). Each the removal ratio is more than 90% in Pb(II) and Cr(III) ions, however, the ratio decreased with increasing the concentration of Cu(II) ion. In addition, adsorption isotherm of Cr(III) ion showed the more increase concentration of solution, the more increase amount adsorbed. The adsorption isotherm of Pb(II) and Cu (II) ions fitted Langmuir adsorption isotherm, on the other hand, the isotherm of Cr(III) ion fitted Freundlich adsorption isotherm in zelkova. The experiment of amount desorbed indicated chemisorption is major in zelkova compared with activated carbon.
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