Experimental and computational study of removal of methyl green and eosin yellow from aqueous solutions using novel sulfamic and sulfanilic acid grafted chitosan-epichlorohydrin -FeO nanocomposites.

Two novel chitosan-based adsorbents, sulfamic acid-chitosan-epichlorohydrin-FeO (HK-1) and sulfanilic acid-chitosan-epichlorohydrin-FeO (HK-2), were successfully synthesized and characterized by XRD, TGA, DSC, BET, and SEM techniques. The ability of the synthesized adsorbents for removing cationic Methyl Green (MG) and anionic Eosin Yellow (EY) from aqueous solutions was investigated at different solution pHs, adsorbent dosages, and contact times. The results showed a removal efficiency of 93.