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  • Chem Sci Trans., 2020, 9(1),  pp 35-46  

    DOI:10.7598/cst2020.1710

    Research Article

    Removal of Methylene Blue from Aqueous Solution by Synthesized Iron Nanoparticles using Black Tea

  • SWEETY J. PATEL*, SHAILESH VAJAPARA and C. P. BHASIN
  • Department of Chemistry, Hemchandracharya North Gujarat University, Patan-384265, India
  • Abstract

    The removal of methylene blue (MB) dye by iron nanoparticles prepared through black tea extract has been investigated. Synthesized iron nanoparticles were characterized by FTIR spectroscopy, X-ray diffraction (XRD), High-resolution transmission electron microscopy (HR-TEM) and Field emission gun scanning electron microscopy (FEG-SEM) with EDAX. The x-ray diffraction patterns revealed that iron nanoparticles exhibited an amorphous nature. Scanning electron microscopy exhibited clearly spherical shape of Fe-nanoparticles (Fe-Nps). The transmission electron microscopy (TEM) of Fe-Nps shows the particle size in the range of 40-60 nm. Further, the degradation of methylene blue dye was studied. To obtain the optimal conditions for the dye degradation, the effect of various experimental parameters, like the proportion of adsorbent, pH, the concentration of dye and contact time on the rate of reaction was studied. Adsorption of methylene blue dye follows pseudo-first-order kinetics. It was found that the dye degradation showed best results at a pH of 7, methylene blue dye concentration 50 ppm with 0.50 g of adsorbent. At 291 ?C temperature, the maximum removal of dye was achieved in 75 min by stirring.

    Keywords

    Adsorption, Green synthesis, XRD, FTIR, SEM, EDAX

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