Preparation of ethylenediamine-modified magnetic chitosan complex for adsorption of uranyl ions
Preparation of ethylenediamine-modified magnetic chitosan complex for adsorption of uranyl ions
复制标题
乙二胺修饰磁性壳聚糖复合物吸附铀酰离子的制备
DOI：
10.1016/j.carbpol.2011.01.007
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发表时间：
2011-03
影响因子：
11.2
通讯作者：
Hu, Xin-jiang
中科院分区：
文献类型：
--
作者：
Wang, Jing-song;Peng, Rui-ting;Yang, Jin-hui;Liu, Yao-chi;Hu, Xin-jiang
乙二胺修饰磁性壳聚糖（EMMC）复合物是一种新型的磁性吸附剂，可用于铀酰离子的吸附。XRD分析表明，磁性粒子为尖晶石结构的纯Fe 3 O 4，壳聚糖的结合没有导致磁性粒子的相变。红外光谱分析表明，Fe 3 O 4颗粒被壳聚糖成功地结合在一起，并在EMMC样品中出现了更多的氨基。EMMC在pH 2-7时对铀酰离子有很好的吸附效果。在30 min内即可达到平衡，动力学实验数据符合准二级动力学模型，表明化学吸附是反应的限速步骤。吸附数据可以用Sips模型最好地解释，最大吸附容量为82.83mgUg−1。EMMC可高效再生，表明该吸附剂可满足铀酰离子的再利用。
Ethylenediamine-modified magnetic chitosan (EMMC) complex was developed as a novel magnetic adsorbent for the removal of uranyl ions. XRD spectrum indicated that the magnetic particles were pure Fe3O4with a spinel structure, and the binding of chitosan did not result in a phase change. IR analysis demonstrated that Fe3O4particles were successfully bounded by chitosan and more amino groups appeared in the EMMC samples. EMMC was found to be quite efficient to adsorb uranyl ions at pH 2–7. Equilibrium was established within 30min, and the kinetic experimental data properly correlated with the pseudo-second-order kinetic model, indicating that the chemical sorption is the rate-limiting step. The adsorption data could be best interpreted by the Sips model with a maximum adsorption capacity of 82.83mgUg−1. The EMMC can be regenerated with high efficiency, suggesting that this adsorbent is satisfactory to reuse uranyl ions.
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影响因子：
11.2
作者：
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通讯作者：
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影响因子：
13.6
作者：
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影响因子：
13.6
作者：
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通讯作者：
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影响因子：
11.4
作者：
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