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Preparation and Characterization of a Novel Amidoxime-Modified Polyacrylonitrile/Fly Ash Composite Adsorbent and Its Application to Metal Wastewater Treatment

Author

Listed:
  • Yan Sun

    (School of Public Administration, Hohai University, Nanjing 210098, China)

  • Xiaojun Song

    (School of Public Administration, Hohai University, Nanjing 210098, China)

  • Jing Ma

    (School of Public Administration, Hohai University, Nanjing 210098, China)

  • Haochen Yu

    (School of Public Policy, China University of Mining and Technology, Xuzhou 221043, China)

  • Gangjun Liu

    (Geospatial Science, School of Science, STEM College, RMIT University, Melbourne 3000, Australia)

  • Fu Chen

    (School of Public Administration, Hohai University, Nanjing 210098, China
    School of Public Policy, China University of Mining and Technology, Xuzhou 221043, China)

Abstract

The polyacrylonitrile/fly ash composite was synthesized through solution polymerization and was modified with NH 2 OH·HCl. The amidoxime-modified polyacrylonitrile/fly ash composite demonstrated excellent adsorption capacity for Zn 2+ in an aqueous medium. Fourier transform-Infrared spectroscopy, thermogravimetric analysis, nitrogen adsorption, X-ray diffraction, and scanning electron microscopy were used to characterize the prepared materials. The results showed that the resulting amidoxime-modified polyacrylonitrile/fly ash composite was able to effectively remove Zn 2+ at pH 4–6. Adsorption of Zn 2+ was hindered by the coexisting cations. The adsorption kinetics of Zn 2+ by Zn 2+ followed the pseudo-second order kinetic model. The adsorption process also satisfactorily fit the Langmuir model, and the adsorption process was mainly single layer. The Gibbs free energy ΔG 0 , ΔH 0 , and ΔS 0 were negative, indicating the adsorption was a spontaneous, exothermic, and high degree of order in solution system.

Suggested Citation

  • Yan Sun & Xiaojun Song & Jing Ma & Haochen Yu & Gangjun Liu & Fu Chen, 2022. "Preparation and Characterization of a Novel Amidoxime-Modified Polyacrylonitrile/Fly Ash Composite Adsorbent and Its Application to Metal Wastewater Treatment," IJERPH, MDPI, vol. 19(2), pages 1-13, January.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:2:p:856-:d:723711
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    References listed on IDEAS

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    1. Olli Varis & Matti Kummu, 2012. "The Major Central Asian River Basins: An Assessment of Vulnerability," International Journal of Water Resources Development, Taylor & Francis Journals, vol. 28(3), pages 433-452.
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