Removal of Lead(II), Nickel(II), Zinc(II) and Copper(II) from Multi-metal Systems by Chitosan-glutaraldehyde Beads

摘要

The aim of this work was to use glutaraldehyde-crosslinked chitosan (Chit-GLA) beads to remove lead(II), nickel(II), zinc(II) and copper(II) from polycationic aqueous solutions. The batch experiments were carried on to test the influence of different parameters such as: pH, contact time, and initial ion concentration on adsorption of metal ions onto glutaraldehyde-crosslinked chitosan beads. The results obtained revealed that removal ration decreased in the order: 74.06 for Pb(II), 73.45 for Ni(II), 73.16 for Zn(II), and 72.77% for Cu(II) in mixed solutions with the initial solution with concentration 90.72 mg Pb(II)/L, 99.39 mg Ni(II)/L, 92.32 mg Zn(II)/L, and 108.8 mg Cu(II)/L. The maximum adsorption capacity of 67.19 mg Pb(II)/g Chit-GLA, 67.81 mg Ni(II)/g Chit-GLA, 72.71 mg Zn(II)/g Chit-GLA and 79.18 mg Cu(II)/g Chit-GLA were achieved. The results of this research study can lead to the conclusion that glutaraldehyde-crosslinked chitosan beads can be used for the removal of lead, nickel, zinc and copper from polycationic aqueous solutions. and wastewater. The series: Cu(II) > Zn(II) > Ni(II) > Pb(II) was proposed as the selectivity series of Chit-GLA beads.