A facile two-step approach to the functionalized PVA-based hydrogel nanocomposite used as an effective adsorbent toward methylene blue

In this study, a PVA-based hydrogel nanocomposite has been synthetized and used as the adsorbent for the removal of a cationic dye, methylene blue (MB), from aqueous solution by the adsorption technique under different conditions of initial dye concentration, dosage, contact time and solution pH. The effective hydrogel nanocomposite was prepared through two common reactions, which included the esterification of PVA with excess maleic anhydride in the presence of pyridine and the cross-linking reaction of the obtained macromonomer with acrylic acid in the presence of graphene oxide (GO) via radical polymerization. It was found that the sorption process agreed very well with the Langmuir model and the adsorption rates could be described by pseudo-second-order kinetics, indicating chemical sorption as the rate determining step

کلیدواژه ها:

Adsorption-Hydrogel-Nanocomposite-Graphene Oxide-Poly(vinyl alcohol)