Adsorption characteristics of thorium on silica-based anion exchange resins

被引：0
作者：
Chen Yan-Liang [1 ]
Zhao Long [1 ]
Wei Yue-Zhou [1 ]
He Lin-Feng [2 ]
Tang Fang-Dong [2 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Nucl Sci & Engn, Nucl Chem Engn Lab, Shanghai 200240, Peoples R China
[2] Shanghai Inst Measurement & Testing Technol, Div Chem & Ionizing Radiat Measurement Technol, Shanghai 201203, Peoples R China
来源：
NUCLEAR SCIENCE AND TECHNIQUES | 2015年 / 26卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Thorium; Silica; Anion exchange resin; Adsorption; SPENT NUCLEAR-FUELS; ELUTION METHOD; RARE-EARTHS; SEPARATION; URANIUM; BEHAVIOR; REACTORS;
D O I：
暂无
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
To isolate and separate thorium from nitric acid solutions, three silica-based anion exchange resins were synthesized. Batch experiments were carried out to investigate adsorption behavior of thorium in nitric acid solutions. Adsorption at different concentrations of nitric acid and thorium, influence of contact time and coexisting metal ions, and effect of NO3- were investigated in detail. It was found that at high HNO3 concentrations, the resins exhibited higher adsorption capacity and better affinity towards thorium. The adsorption kinetics could be described by the pseudo-second order model equation, while the adsorption isotherms were well correlated by the Langmuir model. The maximum capacity towards thorium species on SiPyR-N4 was evaluated at 27-28 mg/g-resin. The thermodynamic parameters indicated the adsorption was an exothermic reaction. The presence of NO3- was found to promote the retention of the thorium species.
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页数：8
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