| Magnetic poly (acrylonitrile- co- acrylic acid) nanofibers as a powerful nanosorbent for extraction of malachite green from water sample via magnetic dispersive solid phase extraction method |
| Paper ID : 1681-UFGNSM-FULL |
| Authors: |
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Tahereh Rohani Bastami *1, Nafiseh Sabzroo1, Tahereh Heidari2, Majid Karimi3 1Department of Chemical Engineering, Quchan University of Advanced Technology, Quchan, 94771-67335, Iran 2Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, 91779, Iran 3Department of polymerization, Faculty of Sciences, Iran Polymer and Petrochemical Institute, Tehran, 14975-112, Iran |
| Abstract: |
| This paper describes the development of a new design of nanosrbents, magnetic poly (acrylonitrile- co- acrylic acid) (PAN-co-AA) nanofibers, for the pre-concentration of malachite green (MG) residues in water samples via dispersive magnetic solid phase extraction (d-MSPE) technique. After pre-concentration, the spectrophotometric method was used to determine MG. Magnetic PAN-co-AA nonwoven nanofibers was fabricated by the optimized electrospinning technique after optimization of electrospinning conditions. According to the results, increasing magnetic nanoparticles (MNPs) into polymeric matrix led to significant reduction of fiber diameter from 360 to 70 nm. This change was associated with an increase in nanofibers surface area (from 9.66 m2 g-1 to 12.09 m2 g-1). Fabricated magnetic nanofibers demonstrated suitable magnetic properties (3.6 emu g-1), so it can be used for magnetic separation and easy extraction techniques. In the following step, magnetic PAN-co-AA nanofibers (MNFs) were used to determine MG in aquatic samples. The effect of different variables on extraction was investigated and optimized to enhance the extraction efficiency of MG. The calibration curve was linear in the range of 0.3-1.8 mg L−1 of MG with R2 =0.9911. The detection limit, based on three times the standard deviation of the blank, was 0.03 mg L−1. The relative standard deviation (RSD) for 1, 1.5 and 1.8 mg L-1 of MG was 4.31%, 6.86% and 7.68% (n = 6), respectively. MG was analyzed in different water samples (urban, mineral and river waters) using the proposed method. The recoveries were 95.83-103.3% with an RSD of less than 8%. The results showed that MNFs were suitable for pre-concentration and determination of trace amount of MG in wastewater samples. |
| Keywords: |
| Electrospinning; Magnetic nanofibers; Poly (acrylonitrile- co- acrylic acid); Dispersive magnetic solid phase extraction; Malachite green |
| Status : Paper Accepted (Poster Presentation) |
