| 壳聚糖插层蒙脱土复合材料吸附酸性染料的动力学和热力学研究 |
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| 引用本文： | 马娟娟,卓宁泽,陆嘉伟,李善忠,班鑫鑫,方文丹.壳聚糖插层蒙脱土复合材料吸附酸性染料的动力学和热力学研究[J].离子交换与吸附,2011,27(2). |
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| 作者姓名： | 马娟娟 卓宁泽 陆嘉伟 李善忠 班鑫鑫 方文丹 |
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| 作者单位： | 1. 淮海工学院化工学院,连云港,222005;南京理工大学化工学院,南京,210094
2. 淮海工学院化工学院,连云港,222005 |
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| 基金项目： | 国家自然科学基金(50873042); 淮海工学院院自然科学基金(Z2009021) |
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| 摘 要： | 通过离子交换的方法将天然大分子壳聚糖引入蒙脱土的层间,利用XRD和TG对得到的复合材料进行表征。将该复合材料用于酸性黑10B的吸附,考查了pH值、染料起始浓度、吸附时间以及温度对吸附性能的影响。结果表明,吸附动力学实验数据符合准二级动力学模型。应用Langmuir和Freundlich两种模型描述吸附等温线,结果显示Langmuir模型的拟合效果更好。计算得到吸附过程的热力学参数△Go、△Ho和△So的值分别为-27.16kJ/mol(20℃)、-14.18kJ/mol和44.0J/mol.K,说明复合材料对酸性染料的吸附是一个自发进行的放热过程。
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| 关 键 词： | 壳聚糖插层蒙脱土复合材料 吸附 酸性染料 动力学 热力学 |
KINETIC AND THERMODYNAMIC STUDIES ON THE ADSORPTION OF ACID DYES WITH CHITOSAN-MONTMORILLONITE HYBRID MATERIALS |
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| MA Juanjuan,ZHUO Ningze,LU Jiawei,LI Shanzhong,BAN Xinxin,FANG Wendan.KINETIC AND THERMODYNAMIC STUDIES ON THE ADSORPTION OF ACID DYES WITH CHITOSAN-MONTMORILLONITE HYBRID MATERIALS[J].Ion Exchange and Adsorption,2011,27(2). |
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| Authors: | MA Juanjuan ZHUO Ningze LU Jiawei LI Shanzhong BAN Xinxin FANG Wendan |
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| Institution: | MA Juanjuan1,2 ZHUO Ningze1 LU Jiawei1 LI Shanzhong1,2 BAN Xinxin1 FANG Wendan1 1.Department of Chemical Engineering,Huaihai Institute of Technology,Lianyungang 222005,China 2.Department of Chemical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China |
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| Abstract: | Natural polymer chitosan was introduced into the lamellar structure of montmorillonite by ion-exchange method.The obtained hybrid materials were characterized by XRD and TG.Experimental conditions,such as solution pH,initial dye concentration,contact time and temperature,for removal of Acid black 10B from aqueous solutions by adsorption of chitosan-montmorillonite hybrid materials were optimized.The kinetic experimental data properly correlated with the pseudo-second-order kinetic model.Langmuir and Freundl... |
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| Keywords: | Chitosan intercalated montmorillonite hybrid materials Adsorption Acid dye Kinetics Thermodynamics |
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