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 (1): S10301 doi: 10.13538/j.1001-8042/nst.26.S10301 arXiv: 刘瑞芹

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

Adsorption behavior of 241Am(III) and Eu(III) by silica/polymer-based isoHex-BTP adsorbent from nitric acid solution

LIU Rui-Qin,1 WANG Xin-Peng,1 NING Shun-Yan,1 WEI Yue-Zhou,1, y YANG Jin-Ling,2 ZHAO Ya-Ping,2 and DING You-Qian2   

  1. 1School of Nuclear Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
    2China Institute of Atomic Energy, Beijing 102413, China
  • Contact: WEI Yue-Zhou E-mail:yzwei@sjtu.edu.cn
  • About author:LIU Rui-Qin
  • Supported by:

    Supported by National Natural Science Foundation of China (Nos.
    11305102, 91126006, 21261140335 and 91226111) and Doctoral Fund
    of Ministry of Education of China (No. 20130073110046)

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LIU Rui-Qin, WANG Xin-Peng, NING Shun-Yan, WEI Yue-Zhou, YANG Jin-Ling, ZHAO Ya-Ping, and DING You-Qian. Adsorption behavior of 241Am(III) and Eu(III) by silica/polymer-based isoHex-BTP adsorbent from nitric acid solution.Nuclear Science and Techniques, 2015, 26(1): S10301     doi: 10.13538/j.1001-8042/nst.26.S10301

Abstract:

The adsorption behavior of 241Am(III) and Eu(III) by silica/polymer-based isoHex-BTP adsorbent (isoHex-
BTP/SiO2-P) was investigated by a batch experiment method. isoHex-BTP/SiO2-P exhibited high affinity and
selectivity for 241Am(III) over 152Eu(III) in 2–4 mol/dm3 nitric acid solutions. Within the experimental contact
time range of 0:5–24 h, isoHex-BTP/SiO2-P showed high selectivity for 241Am(III) compared to 152Eu(III) in
3 mol/dm3 nitric acid solution. However, the adsorption kinetics of 241Am(III) and 152Eu(III) was slow. Eu(III)
adsorption followed the pseudo-second-order kinetic model, indicating chemical adsorption as the rate-limiting
step of the adsorption process. And the adsorption agreed well with the Langmuir adsorption model at various
temperatures. The adsorption kinetics and isotherm data indicated that the equilibrium adsorption capacity, the
adsorption rate, the maximum adsorption capacity and the adsorption affinity, increased with temperature. The
thermodynamic parameters, negative change in Gibbs free energy, and positive change in enthalpy and entropy,
suggested that the adsorption of Eu(III) was spontaneous and endothermic process with an increase of entropy.

Key words: isoHex-BTP/SiO2-P, Extraction chromatography, High level liquid waste (HLLW), Am(III), Eu(III)