Study of Preparation and Properties of Gelain /Activated Carbon Bead From for Rhodamine B and Lead (II) Ions Adsorption

Abstract

The adsorbent from the gelatin (GE) and the powdered activated carbon (AC powder) in GE/AC bead form was prepared for the removal of pollutants from aqueous solution. The advantage of the GE/AC bead are easy handle than that one of AC powder and was higher adsorption capacity than that one of typical granular AC, in the removal of Rhodamine B and Pb2+ ions from waste water. Strategy I: Preparation and characterization of GE/AC beads as an efficient granular adsorbent for adsorption at various pH and temperatures. The optimal weight ratio of AC and GE for the formation of GE/AC bead is 1: 9. By scanning electron microscopy (SEM), the result showed that the GE/AC bead is spherical with nearly equal size about 4 mm. The BET surface area of GE/AC bead is 34.75 m2 g1 which is higher than some granular AC. Moreover, the result from the pH drift method presented that the point of zero charge (pHpzc) of GE/AC beads is 4.5. Strategy II: The kinetic studies of Rhodamine B and Pb2+ ions adsorption using GE/AC beads. The results from the kinetic of both adsorption data were best fitted with the pseudo-second-order model. Moreover, the adsorption isotherm of Rhodamine B and Pb2+ ions by GE/AC beads was the best fit by the Langmuir model, which predicted the maximum adsorption capacities are of 256.41 and 370.37 mg g1 for Rhodamine B and Pb2+ ions, respectively. The experimental results showed that GE/AC beads are more convenient to use than AC powder and has higher adsorption capacity than typical granular AC, in the removal of Rhodamine B and Pb2+ ions from waste water.