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Preparation of hydrazine-modified polyacrylonitrile nanofibers for the extraction of metal ions from aqueous media

Authors

  • Khalid Saeed,

    Corresponding author
    1. Department of Polymer Science, Kyungpook National University, #1370 Sankyuk-Dong, Buk-Gu, Daegu 702-701, South Korea
    2. Department of Chemistry, University of Malakand, Chakdara, Dir (Lower), Khyber Pukhtoonkhwa, Pakistan
    • Department of Polymer Science, Kyungpook National University, #1370 Sankyuk-Dong, Buk-Gu, Daegu 702-701, South Korea
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  • Soo-Young Park,

    Corresponding author
    1. Department of Polymer Science, Kyungpook National University, #1370 Sankyuk-Dong, Buk-Gu, Daegu 702-701, South Korea
    • Department of Polymer Science, Kyungpook National University, #1370 Sankyuk-Dong, Buk-Gu, Daegu 702-701, South Korea
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  • Tae-Jin Oh

    1. Department of Textile System Engineering, Kyungpook National University, #1370 Sankyuk-Dong, Buk-Gu, Daegu 702-701, South Korea
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Abstract

Polyacrylonitrile (PAN) nanofibers (prepared by an electrospinning technique) were chemically modified with hydrazine. The Fourier transform infrared spectrum of the hydrazine-modified polyacrylonitrile (HM–PAN) showed that the intensity of the nitrile peak (2250 cm−1) of the PAN nanofibers decreased significantly after treatment with hydrazine. New peaks at about 3400–3100 cm−1 (N[BOND]H stretching vibration) also appeared, which showed that the hydrazine was chemically attached to the PAN nanofibers. HM–PAN had a smooth surface (as confirmed by a scanning electron microscopy) and was a suitable material for the adsorption of metal ions from aqueous solutions. The adsorption capacity of HM–PAN increased as the adsorption time increased and became constant at 114 and 217 mg/g for Cu(II) and Pb(II) ions, respectively, after 24 h. In addition, more than 90% of the adsorbed Cu(II) and Pb(II) ions were recovered in a 1M HNO3 solution after 1 h. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011

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