Abstract:
In the condition of alkalescence, the Si doped TiO2 cross-linked chitosan was prepared by mixing glutaraldehyde, silicon doped titanium dioxide and cross-linking chitosan. Infared spectra of chitosan before and after modification shows that silicon doped titanium dioxide is mingled successfully into chitosan. The effect of pH value, initial concentration of Cu2+ and the amount of adsorbent on the absorption efficiency were studied. The absorption isotherm was described by the models of both Langmuir and Freundilich equations. The results indicated that the removal rate of Cu2+ is 96.5% in initial concentration of 50mg/L when pH value is equal to 5 at the temperature of 30˚C. The adsorption isotherms were well fitted by the models of Langmuir and Freundilich equations and the maximum adsorption capacity is 119.05 mg/g.