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<p>A novel amidoxime and polyamine bifunctional modified polyacrylonitrile-polyamidoxime-based fiber adsorbent (PAN-PAO-NH<sub>2</sub>-AO) was prepared using wet-spun and hydrothermal methods. The structure, morphology, and properties of the fibers were characterized by various methods to demonstrate the attachment of amidoxime and polyamine groups onto the fibers. The highest adsorption capacity of the material reached 236.3&#xa0;mg/g at pH 5 and 298&#xa0;K. The study of the adsorption mechanism of the fibers showed that the lone pair of electrons of the <i>N</i> and <i>O</i> atoms coordinated with U(VI) by XPS. The results show that PAN-PAO-NH<sub>2</sub>-AO fibers are a potential decontamination material for uranium-containing wastewater.</p>

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Preparation of amidoxime and polyamine bifunctional modified wet-spun polyacrylonitrile–polyamidoxime fibers for adsorption of U(VI) from aqueous solution

  • 期刊论文

  • 发表日期：

    2025年4月2日

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  • Yunyang Gui,
  • Hui Ruan,
  • Haitao Wang,
  • Tiantian Li,
  • Yanrui Liu,
  • Teng He,
  • Yun Xue,
  • Fuqiu Ma,
  • Peng Liu

摘要

A novel amidoxime and polyamine bifunctional modified polyacrylonitrile-polyamidoxime-based fiber adsorbent (PAN-PAO-NH2-AO) was prepared using wet-spun and hydrothermal methods. The structure, morphology, and properties of the fibers were characterized by various methods to demonstrate the attachment of amidoxime and polyamine groups onto the fibers. The highest adsorption capacity of the material reached 236.3 mg/g at pH 5 and 298 K. The study of the adsorption mechanism of the fibers showed that the lone pair of electrons of the N and O atoms coordinated with U(VI) by XPS. The results show that PAN-PAO-NH2-AO fibers are a potential decontamination material for uranium-containing wastewater.