| 壳聚糖吸附酸性大红及Cu2+对吸附的增强作用 |
| |
| 引用本文： | 李克斌,张涛,魏红,陈经涛,刘飞.壳聚糖吸附酸性大红及Cu2+对吸附的增强作用[J].环境科学,2009,30(9):2586-2591. |
| |
| 作者姓名： | 李克斌 张涛 魏红 陈经涛 刘飞 |
| |
| 作者单位： | 西北大学化学与材料科学学院合成与天然功能分子化学教育部重点实验室;西安理工大学市政与环境工程系;陕西教育学院化学系; |
| |
| 基金项目： | 陕西省教育厅科研专项(07JK349) |
| |
| 摘 要： | 采用壳聚糖去除水中酸性大红,对壳聚糖吸附酸性大红的动力学、热力学以及溶液pH、盐浓度、外来Cu2+对吸附的影响进行了研究.准二级吸附动力模型、Langmuir、Freundlich及Dubinin-Radushkevich (D-R)方程分别用来对吸附动力学和等温线进行分析.结果表明,酸性大红在壳聚糖上的吸附是一个化学吸附控制的准二级动力学过程.Langmuir、Freundlich和D-R方程都能较好地描述吸附等温线.溶液pH和温度对吸附有较大影响,而氯化钠浓度对吸附的影响较小.对吸附热力函数的计算结果显示ΔH0<0,表明吸附是一个放热过程.由D-R方程计算的吸附自由能E为9.5~10.7 kJ.mol-1,表明吸附过程为离子交换化学吸附.Cu2+对吸附的影响结果显示Cu2+能显著提高壳聚糖对酸性大红的吸附容量,另外建立了Cu2+浓度与吸附量增加之间的数学模型.
|
| 关 键 词： | 壳聚糖 酸性大红 吸附动力学 Cu2+增强吸附 |
| 收稿时间： | 2008/10/7 0:00:00 |
| 修稿时间： | 2008/12/15 0:00:00 |
Adsorption of Acid Red 3R on Chitosan and Its Enhancement by Cu2+ Co-sorption |
| |
| LI Ke-bin,ZHANG Tao,WEI Hong,CHEN Jing-tao and LIU Fei.Adsorption of Acid Red 3R on Chitosan and Its Enhancement by Cu2+ Co-sorption[J].Chinese Journal of Environmental Science,2009,30(9):2586-2591. |
| |
| Authors: | LI Ke-bin ZHANG Tao WEI Hong CHEN Jing-tao and LIU Fei |
| |
| Institution: | 1.Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education;College of Chemistry & Materials Science;Northwest University;Xi'an 710069;China;2.Department of Municipal and Environmental Engineering;Xi'an University of Technology;Xi'an 710048;3.Department of Chemistry;Shaanxi Education College;Xi'an 710061;China |
| |
| Abstract: | Chitosan was used for the removal of Acid Red 3R from aqueous solutions.Batch adsorption studies were carried out to investigate adsorption kinetics and thermodynamics and the effect of coexisting pH,NaCl,and Cu~(2+) on adsorption.Experimental data were exploited for kinetic and thermodynamic evaluations related to the adsorption processes.The kinetic data correlated well with the pseudo-second-order kinetic model,indicating the chemical sorption via complex formation/ion exchange.The equilibrium data were ... |
| |
| Keywords: | chitosan acid red adsorption kinetics Cu~(2+) enhancing sorption |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《环境科学》浏览原始摘要信息 |
| 点击此处可从《环境科学》下载免费的PDF全文 |
