一种新型可降解β-环糊精基水凝胶对重金属离子的去除作用研究

novel biodegradable β-cyclodextrin-based gel (CAM) was prepared and applied in the removal of Cd2+, Pb2+ and Cu2+ ions from aqueous solutions. CAM hydrogel exhibited a typical three-dimensional network structure and an excellent performance for heavy metal removal. The effects of different experimental parameters, such as initial pH, adsorbent dosage and initial metal ion concentration were investigated. The adsorption isotherm data was fitted well to the Freundlich model. The adsorption capacity order was Pb2+＞Cu2+＞Cd2+ under the same conditions. The maximum adsorption capacities in terms of mg/g dry gel were 210.6 for Pb2+, 116.41 for Cu2+, and 98.88 for Cd2+ respectively. The biodegradation efficiency of the resin reached 79.4 % in Gloeophyllum trabeum. The high adsorption capacity and kinetics results indicated that CAM can be used as an alternative adsorbent to remove the heavy metal.