Electrospun Magnetic Zeolite/Polyacrylonitrile Nanofibers for Extraction of PAHs from Waste Water: Optimized with Central Composite Design
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The present study discovered the synthesis of a novel and efficient magnetic nanofiber fabricated via electrospinning of polyacrylonitrile (PAN) and magnetic zeolite (PAN–MZeo). The synthesized nanofiber was applied as magnetic solid phase extraction (MSPE) adsorbent, for the determination of polycyclic aromatic hydrocarbons (PAHs) in water samples prior to gas chromatography flame ionization detector (GC-FID). Response surface methodology based on the central composite design was employed for the optimization of the various parameters including sorbent amount, desorption solvent volume, adsorption and desorption time on the extraction efficiency. Excellent linearity was achieved at optimized conditions, with coefficients of determination (R2) between 0.9948 and 0.9977. The limit of detections for PAHs was in the range of 0.14–0.21 ng mL−1. The repeatability and reproducibility precision (RSD%) were less than 10%. The real sample analysis showed satisfactory extraction recovery (92–113%) for the five selected PAHs in agricultural, well and mineral water samples. Therefore, the newly fabricated PAN–MZeo–MSPE is an accurate, rapid, and reliable sample-pretreatment method based on comparisons from previous studies.
KeywordsMagnetic solid phase extraction PAN/magnetic zeolite Composite nanofibers Polycyclic aromatic hydrocarbons Central composite design
We are grateful to Research Council of Iran University of Science and Technology (IUST), Iran.