Adsorption characteristics of thorium on silica-based anion exchange resins

doi:10.13538/j.1001-8042/nst.26.060303

Nuclear Science and Techniques ›› 2015, Vol. 26 ›› Issue (6): 060303 doi: 10.13538/j.1001-8042/nst.26.060303

• NUCLEAR CHEMISTRY,RADIOCHEMISTRY,RADIOPHARMACEUTICALS AND NUCLEAR MEDICINE • Previous Articles Next Articles

Adsorption characteristics of thorium on silica-based anion exchange resins

CHEN Yan-Liang,¹ ZHAO Long,¹ WEI Yue-Zhou,¹, HE Lin-Feng 2 TANG Fang-Dong 2

¹Nuclear Chemical Engineering Laboratory, School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
²Division of Chemistry and Ionizing Radiation Measurement Technology, Shanghai Institute of Measurement and Testing Technology, Shanghai 201203, China

Contact: WEI Yue-Zhou E-mail:yzwei@sjtu.edu.cn
Supported by:
Supported by the National Natural Science Foundation of China (No. 91026019)

Export Citation

CHEN Yan-Liang, ZHAO Long, WEI Yue-Zhou, HE Lin-Feng, TANG Fang-Dong . Adsorption characteristics of thorium on silica-based anion exchange resins.Nuclear Science and Techniques, 2015, 26(6): 060303 doi: 10.13538/j.1001-8042/nst.26.060303

Abstract

Abstract:

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 NO^–₃ were investigated in detail. It was found that at high HNO₃concentrations, 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 NO–3 was found to promote the retention of the thorium species.

Key words: Thorium, Silica, Anion exchange resin, Adsorption

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Adsorption characteristics of thorium on silica-based anion exchange resins

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