| 改性壳聚糖对Ag^＋的吸附性能研究 |
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| 引用本文： | 李爱阳.改性壳聚糖对Ag^＋的吸附性能研究[J].黄金,2009,30(1):50-53. |
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| 作者姓名： | 李爱阳 |
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| 作者单位： | 湖南工学院化工系 |
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| 基金项目： | 湖南省自然科学基金，湖南省教育厅科研计划项目，衡阳市工业科研开发计划项目 |
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| 摘 要： | 利用壳聚糖与氯丙酸反应，制备了改性壳聚糖，并研究了改性壳聚糖对Ag^＋的吸附性能。试验结果表明，在pH值为4-6，吸附时间为240rain，温度为40℃，氯丙酸一壳聚糖对Ag^＋的吸附率达到95％以上。通过运用相关数学模型对试验数据进行拟合表明，氯丙酸一壳聚糖对Ag^＋的吸附符合Langmuir和Freundlich等温方程式，最大吸附量为216．9197mg／g，吸附过程符合一级动力学方程。
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| 关 键 词： | 壳聚糖 吸附性能 动力学 热力学 |
Study on the adsorption behavior of Ag~+ by modified chitosan |
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| Li Aiyang.Study on the adsorption behavior of Ag~+ by modified chitosan[J].Gold,2009,30(1):50-53. |
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| Authors: | Li Aiyang |
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| Affiliation: | Chemical Engineering Department;HuNan Institute of Technology |
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| Abstract: | In the paper, an efficient procedure to modify chitosan was carried out by the reaction of chloropropionic acid and chitosan. The adsorption behavior of Ag^＋ by modified ehitosan was investigated. On the condition of pH value 4 -6, adsorption time 240rain and temperature 40℃the adsorption rates of Ag^＋ was up to 95% by chloropropionic acid-chitosan. The experimental data were fit with related mathematic models, and the isotherm adsorption equilibrium fit Langmuir model and Freundlich model. The largest adsorption quantity Qmax is 216. 919 7rag/g, n is 2. 687 4, the R2 values are respectively 0.997 3 and 0.986 6. The adsorption process kinetics accords to the first - order equation. |
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| Keywords: | chitosan adsorption kinetics thermodynamics |
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