中文摘要：

以甲醛、苯甲醛为交联剂,制备交联壳聚糖树脂,再与锆（Ⅳ）离子反应制备锆负载交联壳聚糖吸附剂。采用静态吸附法考察了该吸附剂对水中硫酸根离子（SO24-）的吸附性能。实验发现,吸附时间2 h,SO24-溶液初始浓度500 mg/L,pH值3.0,溶液温度35℃为较优的吸附条件;吸附过程符合Langmuir等温吸附模型,属于优惠吸附型,吸附容量可达78.65 mg/g;吸附过程较好地符合拟二级动力学模型;锆负载前后交联壳聚糖对硫酸根的吸附量提高了约4.5倍;该吸附剂具有良好的耐酸性和再生性能。

英文摘要：

A novel absorbent was prepared by cross-linking chitosan with formaldehyde and benzaldehyde followed by loaded with Zirconium. This chitosan-based material was employed as an absorbent to remove sulfate ion from aqueous solution, and its performance was investigated through batch experiments. The experimental re- suits show that the optimum conditions of adsorption are as follows ： adsorption time of 2 h, initial sulfate ion con- centration of 500 mg/L, temperature of 35℃ and pH of 3.0. The equilibrium sorption process follows Langmuir isotherms well, and indicates a favorable adsorption towards SO4 2- with adsorption capacity of 78.65 mg/g. In addition, the adsorption process could be simulated by the second-order kinetic model. It is also showed that the adsorption capacity of Zr-loaded chitosan is 4.5 times more than that of non-loaded one, the absorbent has good acid resistance and can be reused.