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Nanocomposite hydrogels were produced by free radical polymer­ization of acrylic acid and N -vinylpyrrolidone in the presence of SiO2 nano­par­ticles. The chemical and morphological structures of the hydrogels were deter­mined using Fourier transform infra-red spectroscopy (FT-IR) and field emis­sion scanning electron microscopy (FESEM). The nanocomposite hydrogels were used for the adsorption and desorption of Methylene Blue dye from wastewater. Wastewater was referred to distilled water that contained Methyl­ene Blue dye under laboratory conditions. The carbon, hydrogen and nitrogen contents of the dye, hydrogels and dye-adsorbed hydrogels were determined by elemental analysis. The influences of SiO2 nanoparticles and copolymerization on the adsorption capacity were studied. The maximum dye removal of 98.3 % was obtained with AA- co -VP (3:1) copolymeric hydrogel. The synthesized hydrogels could be evaluated as adsorbents in wastewater treatment, effectively.

journal of the serbian chemical society

Synthesis, characterization and adsorption studies of nano-composite hydrogels and the effect of SiO2 on the capacity for the removal of Methylene Blue dye