Comparative study of polymer containing β-cyclodextrin and -COOH for adsorption toward aniline, 1-naphthylamine and methylene blue

Abstract Three different polymers P1, P2 and P3 (P1 containing both β-CD and –COOH, P2 containing β-CD and P3 containing –COOH) were synthesized and applied to adsorption toward aniline, 1-naphthylamine and methylene blue. The concentrations ( C ) before and after adsorption were determined and the adsorption capacities ( q ) of P1, P2 and P3 were calculated. The maximum adsorption capacities ( q max ) toward aniline: q max (P1) = 104 μmol g −1 , q max (P2) = 14.9 μmol g −1 and q max (P3) = 53.1 μmol g −1 ; toward 1-naphthylamine: q max (P1) = 184 μmol g −1 , q max (P2) = 53.8 μmol g −1 and q max (P3) = 125 μmol g −1 ; toward methylene blue: q max (P1) = 200 μmol g −1 , q max (P2) = 12.7 μmol g −1 and q max (P3) = 215 μmol g −1 . P1 exhibited remarkable adsorption toward all the three adsorbates. P2 was almost equal to P1 in adsorption toward methylene blue, but was less efficient than P1 in adsorption toward aniline and 1-naphthylamine. P3 also exhibited considerable adsorption toward aniline and 1-naphthylamine, but was inefficient toward methylene blue. P1 was obtained from nontoxic materials and through environment friendly procedures, so it was potentially an efficient and green adsorbent for water purification.