Sorption of NdF3 and ThF4 from the LiF-NaF-KF Melt

被引：2
|
作者：
Fedorov, Yu S. [1 ]
Samonin, V. V. [1 ]
Zotov, A. S. [1 ]
Khrylova, E. D. [1 ]
Spiridonova, E. A. [1 ]
Miroslavov, A. E. [2 ]
Akatov, A. A. [1 ]
机构：
[1] St Petersburg State Technol Inst Tech Univ, St Petersburg 190013, Russia
[2] Khlopin Radium Inst, St Petersburg 194021, Russia
来源：
RADIOCHEMISTRY | 2021年 / 63卷 / 06期
基金：
俄罗斯基础研究基金会;
关键词：
fluorides; melts; alkali metals; neodymium; thorium; sorption; activated carbon; MOLTEN; CHEMISTRY;
D O I：
10.1134/S1066362221060072
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The sorption of neodymium and thorium fluorides by AG-3 activated carbon from molten alkali metal fluorides LiF-NaF-KF has been studied. The sorption isotherm of neodymium fluoride at 650 degrees C has a pronounced convex and is adequately described by the Langmuir equation. The sorption of thorium fluoride under the same conditions is much weaker than that of neodymium fluoride, which is determined by the size of the neodymium and thorium fluoride complexes. The kinetic dependence of the sorption of neodymium fluoride at a temperature of 650 degrees C is adequately described by a first-order equation for a reversible reaction. The temperature dependence of sorption capacity in the range 550-750 degrees C passes a maximum within 600-650 degrees C.
引用
收藏
页码：754 / 761
页数：8
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