The adsorption capacity of cadmium by MT-CD@SiO2 is investigated by static adsorption equilibrium experiment. Different
ranges of cadmium solutions (pH 6.0) are adsorbed by MTCD@SiO2 under vigorous stir for 90 min to facilitate sorption
equilibrium. Cd2+ adsorption by MT-CD@SiO2 fits Langmuir model as expressed in the following equation (Fig. 5A).