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 ›› 2019, Vol. 30 ›› Issue (2): 20 doi: 10.1007/s41365-019-0543-0


Preparation of amidoxime-based PE/PP fibers for extraction of uranium from aqueous solution

Xiao Xu1,2 • Xiao-Jun Ding2,3 • Jun-Xuan Ao2,3 • Rong Li2 • Zhe Xing2 • Xi-Yan Liu2 • Xiao-Jing Guo2 • Guo-Zhong Wu2 • Hong-Juan Ma2 • Xiao-Yan Zhao1   

  1. 1 School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
    2 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
    3 University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2018-03-19 Revised:2018-06-13 Accepted:2018-07-11
  • Contact: Hong-Juan Ma; Xiao-Yan Zhao;
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (Nos. U1732151 and 21676291) and Strategic Pilot and Technology Special Funds of the Chinese Academy of Science (No. XDA02030200).
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Xiao Xu, Xiao-Jun Ding, Jun-Xuan Ao, Rong Li, Zhe Xing, Xi-Yan Liu, Xiao-Jing Guo, Guo-Zhong Wu, Hong-Juan Ma, Xiao-Yan Zhao. Preparation of amidoxime-based PE/PP fibers for extraction of uranium from aqueous solution.Nuclear Science and Techniques, 2019, 30(2): 20     doi: 10.1007/s41365-019-0543-0

Abstract: A novel amidoxime-based fibrous adsorbent, denoted as PE/PP-g-(PAAc-co-PAO), was prepared by preirradiation grafting of acrylic acid and acrylonitrile onto polyethylene-coated polypropylene skin–core (PE/PP) fibers using 60Co γ-ray irradiation, followed by amidoximation. The original and modified PE/PP fibers were characterized by a series of characterization methods to demonstrate the attachment of amidoxime groups onto the PE/PP fibers. Breaking strength tests confirmed that the fibrous adsorbent could maintain good mechanical properties. The adsorption capacity of the PE/PP-g-(PAAc-co- PAO) fibers was investigated in simulated seawater with an initial uranium concentration of 330 lg/L. The uranium adsorption capacity was 2.27 mg/g-adsorbent after 24 h in simulated seawater, and the equilibrium data were well described by the Freundlich isotherm model. The PE/PP-g- (PAAc-co-PAO) adsorbent exhibited good regeneration and recyclability during five adsorption–desorption cycles. The adsorption test was also performed in simulated radioactive effluents with uranium concentrations of 10 and 100 lg/L. The effect of the pH value on the adsorption capacity was also studied. At a very low initial concentration 10 lg/L solution, the PE/PP-g-(PAAc-co-PAO) fiber could remove as much as 93.0% of the uranium, and up to 71.2% of the uranium in the simulated radioactive effluent. These results indicated that the PE/PP-g-(PAAcco- PAO) adsorbent could be used in radioactive effluents over a wide range of pH values. Therefore, the PE/PP-g- (PAAc-co-PAO) fibers, with their high uranium selectivity, good regeneration and recyclability, good mechanical properties, and low cost, are promising adsorbents for extracting uranium from aqueous solutions.

Key words: Amidoxime groups, Pre-irradiation, PEcoated PP skin–core fiber, Adsorption, Uranium