College of Chemistry and Chemical Engineering, Hunan University of Science and Technology College of Chemistry and Chemical Engineering, Hunan University of Science and Technology College of Chemistry and Chemical Engineering, Hunan University of Science and Technology College of Chemistry and Chemical Engineering, Hunan University of Science and Technology College of Chemistry and Chemical Engineering, Hunan University of Science and Technology College of Chemistry and Chemical Engineering, Hunan University of Science and Technology
Abstract：In order to separate selectively Cu2+, Cu2+ imprinted polymer/aluminium oxide (IIP/Al2O3) was prepared by the surface-grafting and surface imprinting techniques. Al2O3 powder modified with tetraethylorthosilicate was used as the carrier, and chitosan as the functional monomer. Dynamic adsorption of Cu2+ on IIP/Al2O3 was studied, and Thomas, Yoon-Nelson and Wolborska models were adopted to fit to the experimental data. Further, experiments were performed to optimize the parameters of dynamic desorption. The results indicated that breakthrough capacity and dynamic adsorption capacity of the IIP/Al2O3 were 4.03 and 15.68 mg/g, respectively, and removal rate of Cu2+ reached 45.55% at Cu2+ inlet concentration of 100 mg/L, IIP/Al2O3 column height of 37.25 mm, flow rate of 1.0 mL/min and pH value of 5. The Thomas and Yoon-Nelson models fit well to the experimental data of dynamic adsorption. 15 mL hydrochloric acid solution at 0.6 mol/L resulted in the desorption rate of 99.54% for Cu2+ at IIP/Al2O3 column height of 37.25 mm and flow rate of 1.0 mL/min. Desorption time was short, and Cu2+ was easily recycled.
2014, Vol. 14 
