Thermodynamic parameters of Am(III), Cm(III) and Eu(III) extraction by CyMe4-BTPhen in cyclohexanone from HNO3 solutions
Thermodynamic parameters of Am(III), Cm(III) and Eu(III) extraction by CyMe4-BTPhen in cyclohexanone from HNO3 solutions
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DOI：
10.1016/j.jct.2019.105955
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发表时间：
2020-02-01
影响因子：
2.6
通讯作者：
Lewis, Frank W.
中科院分区：
文献类型：
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作者：
Distler, Petr;Stamberg, Karel;Lewis, Frank W.
测定了CyMe_4-BTPhen-环己酮体系与Am（Ⅲ）、Cm（Ⅲ）、Eu（Ⅲ）-HNO_3体系在水相中萃取体系的热力学参数。在不同温度（15-45 ℃）下进行动力学萃取实验，并使用相应的总传质系数计算表观活化能和频率因子值。利用实验得到的分配系数计算了反应焓和熵。在此基础上，确定了萃取反应的控速过程和放热特征。(C)2019爱思唯尔有限公司
The thermodynamic parameters of the extraction system consisting of CyMe4 -BTPhen dissolved in cyclohexanone and Am(III), Cm(III) and Eu(III) in HNO3 in the aqueous phase have been determined. Kinetic extraction experiments were carried out under various temperatures (15-45 degrees C) and the corresponding over-all mass transfer coefficients were used for the calculation of apparent activation energy and frequency factor values. The values of reaction enthalpy and entropy were also calculated using the distribution coefficients resulting from the experiments mentioned above. Based on the calculated data, the rate-controlling processes and the exothermic character of the studied extractions were determined. (C) 2019 Elsevier Ltd.