Abstract
Abstract:
Hydrogel nanocomposites were synthesized by solution polymerization of acrylic acid in the presence
of sodium alginate biopolymer and TiO2 nanoparticle. TiO2 nanoparticle and N,N-methylene-bis-
acrylamide was used as an inorganic and organic crosslinker, respectively. The structure and
morphology of the nanocomposites were investigated using X-Ray Diffraction (XRD), Fourier Transform
Infra-Red Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), Brunauer-Emmett- Teller (BET)
and thermogravimetric analysis techniques. The nanocomposites hydrogel was used for the adsorption
of methyl violet dye from water. The influence of TiO2 nanoparticle, sodium alginate content and
grafting on adsorption were studied. The results showed that a pseudo-second-order adsorption
kinetic was predominant in the adsorption of methyl violet onto the nanocomposite hydrogel. The
experimental equilibrated adsorption capacity of the nanocomposite hydrogel agrees with Langmuir
isotherm. Maximum adsorption capacity of 1156.61 mg g-1 and adsorption efficiency of
99.6% towards methyl violet were obtained for the hydrogel nanocomposite.