Abstract:A novel crosslinked polymer containing β-cyclodextrin (β-CD) and polyamidoamine (PAMAM) was synthesized. The polymer was characterized by element analysis, scanning electron microscope and Fourier transform infrared spectroscopy. Five possible complex mechanisms were mentioned. The adsorption kinetics and isotherms were studied. The results showed that the equilibrium time was 300min, the optimal pH value was 5~6.5, and adsorption capacity was 0.78mmol/g. Adsorption kinetics followed the pseudo 2nd order model. Rate limiting step in the process of adsorption was particle diffusion. Equilibrium isotherm data were satisfactorily fitted by the Freundlich equation. At 288, 298, 303 and 308K, the ΔG value equaled to -2.139, -2.417, -2.188 and -2.218kJ/mol, respectively, thus the adsorption process was spontaneous.