Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

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   

  1. 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)

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:

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 NO–3 was found to promote the retention of the thorium species.

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