Nuclear Techniques ›› 2017, Vol. 40 ›› Issue (5): 50301-050301.doi: 10.11889/j.0253-3219.2017.hjs.40.050301

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

Preparation of polypropylene fibrous adsorbents for extraction of uranium from seawater by radiation grafting method

LI Rong1, PANG Lijuan1,2, ZHANG Mingxing1,2, WANG Minglei1,2, ZHANG Maojiang1,2, LIU Xiyan1, MA Hongjuan1, WANG Mouhua1, WU Guozhong1,3   

  1. 1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Jiading Campus, Shanghai 201800, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China;
    3 School of Physical Science and Technology, ShanghaiTech University, Shanghai 200031, China
  • Received:2017-03-09 Revised:2017-03-24 Online:2017-05-10 Published:2017-05-03
  • About author:10.11889/j.0253-3219.2017.hjs.40.050301
  • Supported by:

    Supported by National Natural Science Foundation of China (No.11605275,No.11675247)

Abstract:

Background: A recent estimate indicates that the land-based uranium sources are only able to last for about a century. Consequently, it is imperative to exploit new uranium resources with an economically feasible method. The uranium dissolved in seawater is about 4.5×109 t, much larger than the terrestrial sources, even though its concentration in seawater is low (about 3.3 μg·L-1). Hence, it is essential to develop techniques for mining uranium from seawater in order to satisfy the demand for uranium for nuclear power plants in the future. Purpose:The aim of this work is grafting of poly(amidoxime) (PAO) and poly(acrylic acid) (PAA) onto polypropylene (PP) fibers to prepare the PP-g-P(AO-co-AA) fibrous adsorbents for recovery of uranium from seawater. Methods: The PP-g-P(AO-co-AA) fibrous adsorbents were synthesized by electron beam pre-irradiation induced graft polymerization of AN and AA, followed by amidoximation. The surface morphology, chemical structure and thermal performance of the pristine and modified PP fibers were analyzed by attenuated total reflection Fourier transform infrared (ATR-FTIR), scanning electron microscope (SEM) and thermogravimetric analysis (TGA), respectively. The adsorption capacities of uranium and other metal ions by PP-g-P(AO-co-AA) fibrous adsorbents were evaluated after 68 d of immersion in natural seawater. Results and Conclusion: The uranium adsorption capacity of PP-g-P(AO-co-AA) fibers reached 0.81 mg·g-1 after 68 d of contact with natural seawater, and the uranium adsorption capacity did not show positive correlation with the degree of grafting and AO density of PP-g-P(AO-co-AA) fibers.

Key words: Polypropylene fibers, Amidoxime group, Acrylic acid, Uranyl ions, Extraction of uranium from seawater

CLC Number: 

  • TL13