壳聚糖交联β-环糊精对酸性染料吸附动力学和热力学研究  

Kinetic and thermodynamic studies on the adsorption of acid dyes onto chitosan-β-cyclodextrin polymer

作　　者：陈树薇[1] 施文健[1] 宋伟[1] 秦琴[1] 张元璋[1] 高隽臣[1] 

机构地区：[1]上海理工大学城建学院环境工程系,上海200093

出　　处：《功能材料》2009年第4期656-659,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(70371011)

摘　　要：戊二醛作交联剂,在壳聚糖分子链中引入了β-环糊精的疏水空腔结构,制备出壳聚糖交联β-环糊精高聚物(CTS-CD)。以酸性红B为例,研究了CTS-CD对酸性染料的吸附动力学和热力学特性。298K,CTS-CD对酸性红B的饱和吸附容量高达661.4 mg/g,起始浓度363.2mg/L,吸附ΔH=80.3kJ/mol、ΔS=323.3J/(mol.K)、ΔG=-16.1kJ/mol,Ea=11.72kJ/mol。室温下,吸附过程可用一级吸附动力学方程来描述,符合Langmuir等温吸附模型。CTS-CD可作为吸附材料用于治理染料、印染废水。In this paper, chitosan-β-cyclodextrin （CTS-CD）, a kind of high polymer, was synthesized by immobilizing the β-cyclodextrin （β-CD） onto the molecular structure of chitosan by the cross-linking function of glutaraldehyde. The adsorption kinetic and thermodynamic characteristics of acid dyes on CTS-CD were studied by taking the Acid Red B as an example. At 298K, the saturated adsorption capacity of CTS-CD for Acid Acid B was 661.4mg/g. When the initial concentration of Acid Red B was 363.2mg/L, the enthatpy change （△H）, the entropy change （△S）, the Gibbs free energy change （△G） and the apparent activation energy of the adsorption were 80.3, 323.3, -16.1 and 11.72kJ/mol, respectively. At room temperature, the adsorption of CTS-CD for contaminants followed Langmuir adsorption equation and the first-order kinetic equation. As an adsorption material, CTS-CD can be used to remove acid dyes from industrial wastewater.

关 键 词：壳聚糖 Β-环糊精 酸性染料 吸附 动力学 热力学 

分 类 号：O636.1[理学—高分子化学] O647.33[理学—化学]