Adsorption properties of β-cyclodextrin cracking products for Cd2+

B-cyclodextrin can react with metals through hydroxyl groups, which has a certain contribution to the removal of heavy metals. However, the application of beta-cyclodextrin in heavy metal adsorption is limited because of its slow adsorption speed and low adsorption capacity. In this paper, beta-cyclodextrin was pyrolyzed under oxygen limitation to prepare beta-cyclodextrin pyrolysis product, and its adsorption performance of Cd2+ in water was studied. The adsorption of Cd2+ by the beta-cyclodextrin cracked product conforms to the quasi-first-order kinetic model, and the Langmuir fitting effect is better. The maximum adsorption capacity of Cd2+ by beta-cyclodextrin cracking products prepared at 300 degrees C, 500 degrees C and 700 degrees C is 1029.04mg/g, 1237.42mg/g and 829.06mg/g, respectively.