Preparation of amidoxime-modified polyacrylonitrile (PAN-oxime) nanofibers and their applications to metal ions adsorption |
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Authors: | Khalid Saeed Sajjad Haider Tae-Jin Oh Soo-Young Park |
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Affiliation: | 1. Department of Polymer Science, Kyungpook National University, #1370 Sankyuk-dong, Buk-gu, Daegu 702-701, South Korea;2. 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 were applied to metal adsorption. PAN nanofibers (prepared by an electrospinning technique) were chemically modified with amidoxime groups, which are suitable for metal adsorption due to their high adsorption affinity for metal ions. The adsorption of the amidoxime-modified PAN (PAN-oxime) (25% conversion) nanofibers followed Langmuir isotherm. The saturation adsorption capacities for Cu(II) and Pb(II) of 52.70 and 263.45 mg/g (0.83 and 1.27 mmol/g), respectively, indicating that the monolayer adsorption occurred on the nanofiber mats. In addition, over 90% of metals were recovered from the metal-loaded PAN-oxime nanofibers in a 1 mol/L HNO3 solution after 1 h. |
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Keywords: | Polyacrylonitrile Nanofibers Amidoxime-modified polyacrylonitrile Adsorption Desorption |
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