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Adsorption of Metal Ions by Amidoxime-based Polyacrylic Fibers

Anup Tuladhar1, Horng-Bin Pan1 and Chien M. Wai1*
  • 1 University of Idaho, United States

A new amidoxime-based polyacrylic fiber is synthesized from the acrylic yarn – cheap and commercially available raw material – by reacting with hydroxylamine followed by alkaline hydrolysis to prepare amidoxime [C(NH2) = NOH] and carboxylic (COOH) groups on the polymer strands. The adsorbent was characterized by infrared spectroscopy. FTIR study of the fiber after the lead adsorption experiment showed that the stretch of the N-O peak is distorted slightly and the COO¯ peak is red-shifted compared to the free adsorbent. The adsorption capacities of the fiber for different heavy metals were evaluated using a fixed volume of known concentration of the heavy metal salt solution with various amounts of the fiber at different temperatures. The adsorption capacity of lead (II) at room temperature is about 169.9 mg of lead per gram of the fiber. The rate of adsorption of lead ions in aqueous solution by the fiber adsorbent is rapid. The results also showed the pseudo-second-order model fits the experimental data very well with the correlation coefficient greater than 0.999.

Keywords: Adsorption, acrylic fiber, Amidoxime-based Poly acrylic fiber, adsorbent, Lead, sorption

Conference: National Organization for the Professional Advancement of Black Chemists and Chemical Engineers (NOBCChE) 45th Annual Conference , Orlando, Florida, United States, 17 Sep - 20 Sep, 2018.

Presentation Type: Poster Presentation

Topic: Analytical Chemsitry

Citation: Tuladhar A, Pan H and Wai CM (2019). Adsorption of Metal Ions by Amidoxime-based Polyacrylic Fibers. Front. Chem. Conference Abstract: National Organization for the Professional Advancement of Black Chemists and Chemical Engineers (NOBCChE) 45th Annual Conference . doi: 10.3389/conf.fchem.2018.01.00057

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Received: 19 Oct 2018; Published Online: 17 Jan 2019.

* Correspondence: Prof. Chien M Wai, University of Idaho, Moscow, United States, cwai@uidaho.edu