PREPARATION AND CHARACTERIZATION OF NOVEL CHITOSAN DERIVATIVES: ADSORPTION EQUILIBRIUM OF IRON(III) ION
PREPARATION AND CHARACTERIZATION OF NOVEL CHITOSAN DERIVATIVES: ADSORPTION EQUILIBRIUM OF IRON(III) ION
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新型壳聚糖衍生物的制备和表征：铁(III)离子的吸附平衡
DOI：
10.1142/s0256767908002601
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发表时间：
2008
影响因子：
4.3
通讯作者：
Yanfei Liu
中科院分区：
文献类型：
--
作者：
Ke‐long Huang;P. Ding;Suqin Liu;Gui;Yanfei Liu
在间歇吸附系统中研究了壳聚糖α-酮戊二酸（KCTS）和异羟肟酸化壳聚糖α-酮戊二酸（HKCTS）对水溶液中Fe（III）离子的吸附。实验根据 pH、温度、搅拌速率和 Fe(III) 离子浓度进行。应用 Langmuir 和 Freundlich 吸附模型来描述平衡等温线并确定等温常数。 Langmuir 模型与实验数据非常吻合。使用准一级和二级动力学模型来描述动力学数据并评估速率常数。动力学数据与二阶动力学模型吻合良好。 KCTS 和 HKCTS 的准二级动力学模型的活化能分别为 19.61 和 7.98 kJ/mol。这表明 Fe(III) 吸附的总体速率可能是由化学过程控制的。结果还表明新型壳聚糖衍生物（KCTS 和 HKCTS）是良好的吸附剂。
The adsorption of Fe(III) ions from aqueous solution by chitosan alpha-ketoglutaric acid (KCTS) and hydroxamated chitosan alpha-ketoglutaric acid (HKCTS) was studied in a batch adsorption system. Experiments were carried out as function of pH, temperature, agitation rate and concentration of Fe(III) ions. The Langmuir and Freundlich adsorption models were applied to describe the equilibrium isotherms and isotherm constants were determined. The Langmuir model agrees very well with experimental data. The pseudo-first-order and second-order kinetic models were used to describe the kinetic data and the rate constants were evaluated. The dynamical data fit well with the second-order kinetic model. The pseudo second-order kinetic model was indicated with the activation energy of 19.61 and 7.98 kJ/mol for KCTS and HKCTS, respectively. It is suggested that the overall rate of Fe(III) adsorption is likely to be controlled by the chemical process. Results also showed that novel chitosan derivatives (KCTS and HKCTS) were favorable adsorbents.