Volume 17 Issue 2
Jun.  2024
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Lin Hu, Lin Chen, Xian-kun Wu, Rui Luo, Rong-guan Lv, Zheng-hao Fei, Feng Yang. 2024: Efficient removal of U(VI) from wastewater by a sponge-like 3D porous architecture with hybrid electrospun nanofibers. Water Science and Engineering, 17(2): 150-156. doi: 10.1016/j.wse.2023.11.001
Citation: Lin Hu, Lin Chen, Xian-kun Wu, Rui Luo, Rong-guan Lv, Zheng-hao Fei, Feng Yang. 2024: Efficient removal of U(VI) from wastewater by a sponge-like 3D porous architecture with hybrid electrospun nanofibers. Water Science and Engineering, 17(2): 150-156. doi: 10.1016/j.wse.2023.11.001

Efficient removal of U(VI) from wastewater by a sponge-like 3D porous architecture with hybrid electrospun nanofibers

doi: 10.1016/j.wse.2023.11.001
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This work was supported by the Opening Project of the Jiangsu Province Engineering Research Center of Agricultural Breeding Pollution Control and Resource (Grant No.2021ABPCR010) and the Natural Science Research Project of Jiangsu Higher Education Institutions of China (Grants No.20KJB150035,21KJD610004,and 21KJA530004).

  • Received Date: 2022-11-19
  • Accepted Date: 2023-10-29
  • Available Online: 2024-05-14
  • Removal of uranium(VI) from nuclear wastewater is urgent due to the global nuclear energy exploitation. This study synthesized novel sponge-like 3D porous materials for enhanced uranium adsorption by combining electrospinning and fibrous freeze-shaping techniques. The materials possessed an organic-inorganic hybrid architecture based on the electrospun fibers of polyacrylonitrile (PAN) and SiO2. As a supporting material, the surface of fibrous SiO2 could be further functionalized by cyano groups via (3-cyanopropyl) triethoxysilane. All the cyano groups were turned into amidoxime (AO) groups to obtain a amidoxime-functionalized sponge (PAO/SiO2-AO) through the subsequent amidoximation process. The proposed sponge exhibited enhanced uranium adsorption performance with a high removal capacity of 367.12mg/g, a large adsorption coefficient of 4.0×104 mL/g, and a high removal efficiency of 97.59 %. The UO22+ adsorption kinetics perfectly conformed to the pseudo-second-order reaction. The sorbent also exhibited an excellent selectivity for UO22+ with other interfering metal ions.

     

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