期刊
CHEMICAL ENGINEERING JOURNAL
卷 172, 期 1, 页码 572-580出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2011.06.011
关键词
Cesium; Ion exchanger; Adsorption; Copper hexacyanoferrate; Polyacrylonitrile
In this study, copper hexacyanoferrate-polyacrylonitrile composite (CHCF-PAN) was prepared and used as an ion exchanger for the separation of cesium from aqueous solution. Various characterization methods including XRD, FT-IR, TG-DSC, SEM, BET and XRF were utilized for the evaluation of the synthesized ion exchanger. In order to obtain the optimum conditions for the adsorption, the influence of pH of initial aqueous solution, contact time, solution temperature and presence of the interfering cations on the distribution coefficient of cesium onto CHCF-PAN sorbent were studied. Furthermore, adsorption thermodynamic parameters namely the standard enthalpy, entropy, and Gibbs free energy were calculated and it was found that the ion exchange reaction is an endothermic and spontaneous process. Langmuir, Freundlich, Dubinin-Radushkevich (D-R) and Temkin isotherm models were fitted to the obtained experimental sorption data and it was observed that the sorption of cesium on the synthesized sorbent was better represented by the Freundlich model. Finally, in order to calculate the dynamic adsorption capacity of the synthesized ion exchanger, the column experiments were also investigated. (C) 2011 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据