Chitosan biopolymer based nanocomposite hydrogels for removal of methylene blue dye
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Date
2020-05
Journal Title
Journal ISSN
Volume Title
Type
Article
Publisher
Springer Nature
Series Info
SN Applied Sciences;(2020) 2:968
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Abstract
Nanocomposite hydrogels were synthesized by γ-radiation-induced copolymerization and crosslinking of Chitosan
biopolymer (CS), acrylic acid (AAc) and TiO2 nanoparticles (CS-PAAc/TiO2). The structure, morphology, and properties of
the nanocomposites were investigated using Fourier-transform infrared spectroscopy, X-Ray Difraction, Scanning elec-
tron microscopy, Transmission electron microscopy, and thermogravimetric analysis techniques. The nanocomposites
hydrogel was used for the removal of methylene blue dye (MB) from wastewater. It was found that the presence of TiO2
in the copolymeric matrix enhances the adsorption by increasing the physical interaction between the dye molecules
and the adsorbent surface. The removal percentage increases with the increase in pH of the medium of all investigated
samples and the maximum value is obtained at the solution pH is 10. The maximum adsorbent dosage for CS-PAAc/
TiO2 nanocomposites is 0.20 g and for CS-PAAc hydrogel is 0.15 g per liter of the adsorbate. This study revealed that the
loading of TiO2 nanoparticles into the polymeric matrix of CS-PAAc does a remarkable increase in the removal parentage
of MB dye from its aqueous solution.
Description
Researchgate
Keywords
Gamma radiation , Nanocomposite, Chitosan, TiO2, Dye removal
Citation
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