Evaluation of AMP–PAN composite for adsorption of Cs+ ions from aqueous solution using batch and fixed bed operations
Evaluation of AMP–PAN composite for adsorption of Cs+ ions from aqueous solution using batch and fixed bed operations
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DOI：
10.1007/s10967-011-1455-6
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发表时间：
2012-05
影响因子：
1.6
通讯作者：
A. Nilchi;R. Saberi;M. Moradi;H. Azizpour;R. Zarghami
中科院分区：
文献类型：
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作者：
A. Nilchi;R. Saberi;M. Moradi;H. Azizpour;R. Zarghami
合成了一种新型的有机-无机复合离子交换剂-磷酸铵-聚丙烯腈（AMP-PAN），并研究了其对水中铯的吸附性能。采用X射线粉末衍射、傅里叶变换红外光谱、热重-差示扫描量热法、比表面分析、扫描电镜、X射线荧光光谱和CHN元素分析等技术对合成的复合材料进行了表征。研究了铯在复合吸附剂上的吸附随接触时间、pH、温度和各种阳离子存在的变化。此外，还测定了吸附热力学参数，发现铯在吸附剂上的吸附是一个吸热的自发过程。用Langmuir和Freundlich吸附等温线对吸附数据进行了拟合，结果表明，Langmuir吸附等温线模型能较好地预测铯在该吸附剂上的吸附。在固定床柱上研究了铯在AMP-PAN离子交换剂上的吸附动力学行为，并进行了解吸实验。
Ammonium molybdophosphate–polyacrylonitrile (AMP–PAN) as an organic–inorganic composite ion exchanger was synthesized and investigated for adsorption of cesium from aqueous solutions. The synthesized composite was characterized by various techniques including X-ray powder diffraction, Fourier Transform Infrared Spectroscopy, thermogravimetry-differential scanning calorimetry, specific surface analysis, scanning election microscopy, X-ray fluorescence spectroscopy and CHN elemental analysis. The cesium adsorption on composite adsorbent was studied as a function of contact time, pH, temperature, and presence of various cations. In addition, adsorption thermodynamic parameters were determined and it was observed that the adsorption of cesium on the adsorbent is an endothermic and spontaneous process. The Langmuir and Freundlich adsorption isotherms were fitted to the adsorption data and the results showed that the Langmuir model best predicates the cesium adsorption on the adsorbent. The dynamic behavior of cesium adsorption on AMP–PAN ion exchanger was also investigated for a fixed bed column and desorption was carried out.