Removal of lead ions from aqueous solution using hydrogel nanocomposite based on chitosan/ graphene : The effect of functionalization

Water pollution due to the indiscriminate disposal of metal ions and organic contaminants has been a rising worldwide environmental concern. The nanocomposite based on chitosan / functionalized graphene was used to remove of lead ions from aqueous media. The hydrogel was produced by solvent and the freeze dry method.The oxidized graphene was produced using acid treatment. The triethylenetetramine (TETA) was grafted on the surface of the graphene after acylation reaction. The results of thermal gravimetric analysis (TGA) and fourier transform infra-red analysis (FTIR) showed that the functionalization reaction was successfully accomplished. The adsorption analysis was done via batch method and evaluated using flame atomic adsorption spectroscopy (FAAS). The results indicated that the functionalized graphene-chitosan nanocomposite hydrogels can be a good candidate for effective adsorption of lead ion

کلیدواژه ها:

lead-chitosan-graphene- functionalization- adsorption