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Noor Mohammad, Yomen Atassi. 2021: Enhancement of removal efficiency of heavy metal ions by polyaniline deposition on electrospun polyacrylonitrile membranes. Water Science and Engineering, 14(2): 129-138. doi: 10.1016/j.wse.2021.06.004
Citation: Noor Mohammad, Yomen Atassi. 2021: Enhancement of removal efficiency of heavy metal ions by polyaniline deposition on electrospun polyacrylonitrile membranes. Water Science and Engineering, 14(2): 129-138. doi: 10.1016/j.wse.2021.06.004
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Enhancement of removal efficiency of heavy metal ions by polyaniline deposition on electrospun polyacrylonitrile membranes

doi: 10.1016/j.wse.2021.06.004

  • Department of Applied Physics, Higher Institute for Applied Sciences and Technology, Damascus, Syria

More Information
  • Corresponding author: E-mail address: yomen.atassi@hiast.edu.sy (Yomen Atassi)
  • Received Date: 2020-11-09
  • Accepted Date: 2021-03-18
    • Available Online: 2021-06-18
    Abstract
  • This paper describes the preparation of a membrane of polyacrylonitrile (PAN) and its corresponding membrane coated with polyaniline (PANI) for the adsorption of heavy metal ions. Scanning electron microscopy micrographs revealed that all the membranes exhibited nanofibrous morphology. The prepared membranes were characterized by Fourier transform infrared spectroscopy (FTIR). The prepared membranes were used as an adsorbent for hazardous heavy metal ions Pb2+ and Cr2O72-. The adsorption capacity and the removal efficiency of the membranes were examined as function of the initial adsorbate concentration and pH of the medium. Coated membranes with PANI showed better adsorption performance and their direct current (DC) conductivities were correlated to heavy metal ion concentrations. Adsorption isotherms were also performed, and the adsorption process was tested according to the Langmuir and Freundlich models. The regeneration and reuse of the prepared membranes to re-adsorb heavy metal ions were also investigated. The enhancement in adsorption performance and reusability of PANI-coated membranes in comparison with non-coated ones is fully discussed. The results show that the maximum adsorption capacities of lead and chromate ions on the PANI-coated membranes are 290.12 and 1 202.53 mg/g, respectively.

     

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