Adsorptive Removal of Copper Ions from Aqueous Solution Using Cross-linked Magnetic Chitosan Beads

• Published in: Chinese journal of chemical engineering Vol. 17; no. 6; pp. 960 - 966
• Main Author: 黄国林 杨婥 章凯 SHI Jeffrey
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.12.2009
• Subjects: adsorption of copper (II); cross-linked magnetic chitosan; Langergren rate equation; Langmuir isotherm; Langmuir吸附; 吸附动力学; 吸附等温线; 环氧氯丙烷; 磁性壳聚糖; 铜离子; 铜（Ⅱ）; Langergren rate equation; adsorption of copper (II); cross-linked magnetic chitosan; Langmuir isotherm
• ISSN: 1004-9541; 2210-321X
• DOI: 10.1016/S1004-9541(08)60303-1

The performance of cross-linked magnetic chitosan, coated with magnetic fluids and cross-linked with ePichlorohydrin, was investigated for the adsorption of Copper （Ⅱ） from aqueous solutions. Infrared spectra of chitosan before and after modification showed that the coating and cross-linking are effective. Experiments were performed at different pH of solution and contact time, and appropriate conditions for the adsorption of Cu（Ⅱ） were determined. Experimental equilibrium data were correlated with Langmuir and Freundlich isotherms for determination of the adsorption potential. The results showed that the Langmuir isotherm was better compared with the Freundlich isotherm, and the uptake of Cu（Ⅱ） was 78.13 mg·g^- 1. The kinetics of adsorption corresponded with the first-order Langergren rate equation, and Langergren rate constants were determined.