Preparation of amidoxime-modified polyacrylonitrile (PAN-oxime) nanofibers and their applications to metal ions adsorption

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• 作者：Khalid Saeed ; Sajjad Haider ; Tae-Jin Oh ; Soo-Young Park
• 关键词：Polyacrylonitrile ; Nanofibers ; Amidoxime-modified polyacrylonitrile ; Adsorption ; Desorption
• 刊名：Journal of Membrane Science
• 出版年：2008
• 出版时间：15 September 2008
• 年：2008
• 卷：322
• 期：2
• 页码：400-405
• 全文大小：443 K

文摘

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.