Bio-based Metal Oxide Nanocomposite Synthesis and its Application in Removing Toxic Dyes from Water Wastes

By : Imtiyaz Rasool Parrey

Page No: 9-16

Abstract 
Iron oxide (Fe3 O4 ) nanoparticles with small size were synthesized by the chemical precipitation method in the presence of biopolymer chitosan. To achieve more discrete nanoparticles and the versatile applications of chitosan it is used for the preparation of chitosan iron oxide nanoparticles. Chitosan covalently bonded on the surface of Iron oxide nanoparticles via chemical activator. Both free chitosan and the chitosan nanocomposite were characterized by using FT-IR, powder XRD, SEM, TGA, and Uv- Vis spectroscopy. The equilibrium swelling studies provide support for the improved structural stability of chitosan incorporated with materials over the synthetic precursors. Scanning electron microscope studies reveal the enhanced surface area and adjustable morphology of the incorporated chitosan materials, along with equilibrium and kinetic uptake results with methylene blue dye in aqueous media, revealing greater uptake of chitosan over pristine chitosan composites. The monolayer uptake capacity (Qm; mg g–1) with methylene blue reveals three fold variation for Qm, where chitosan nanocomposite (445.6 mg g–1) > chitosan (289.9 mg/g). The kinetic uptake profiles of congo red follow a pseudo-second-order trend, where the chitosan shows more rapid uptake over chitosan composite. This study reveals that the sorption properties of chitosan are markedly improved upon the formation of a chitosan nanocomposite.

Author :
Imtiyaz Rasool Parrey : Department of Chemistry, Government Women College, Anantnag, Jammu and Kashmir.
 

DOI: https://doi.org/10.32381/JPSR.2021.37.01.2