【摘要】 文章以壳聚糖为功能单体，以硫酸根为印迹离子，制备了壳聚糖基硫酸根印迹吸附材料，并对其进行表征，采用静态吸附法考察其对水中硫酸根的吸附性能。试验发现：在壳聚糖基硫酸根印迹吸附材料中，铜离子首先与壳聚糖的氨基N原子及仲羟基的O原子发生配位，然后以铜离子为“媒介”，硫酸根以离子对的形式与铜离子发生复合，交联之后可脱除硫酸根形成与硫酸根离子相匹配的空间结构。交联反应和印迹反应大大降低了壳聚糖的结晶度，形成了其无定形的结构；壳聚糖基硫酸根印迹吸附材料吸附硫酸根离子的吸附平衡时间为60 min，准二级动力学模型拟合结果显示对硫酸根的平衡吸附容量为63.21 mg/g。印迹技术形成与目标硫酸根离子相匹配的空间结构，大大提高了壳聚糖基硫酸根印迹吸附材料对硫酸根离子的吸附抗干扰能力。更多还原

【Abstract】 A kind of chitosan-based sulfate imprinted adsorption materials was prepared at laboratory scale by use of chitosan as the functional monomer and sulfate radicals as the imprinted ions, thereby the materials were characterized and then the static adsorption experiment was conducted for investigating the performance of adsorption of sulfate ions in water onto the materials. It was found that the copper ions within the materials were at first combined with both chitosan amino N atoms and para hydroxy O atoms, and the copper ions as a“medium”, with which sulfate ions were recombined in the form of ion-pair.After the crosslinking sulfate radicals were removed and a spatial structure which matched sulfate ions formed; crosslinking and imprinting reactions greatly reduced the degree of crystallinity of chitosan and a kind of amorphous structure took shape.The adsorption equilibrium time for the adsorption of sulfate ions was 60 min; and the fitting results with the psedo-secondorder dynamic model revealed the adsorption volume amounted to 63.21 mg/g. In conclusion, the printing technology and the spatial structure of matched sulfate ions considerably increased the anti-interference capability of sulfate ions adsorption onto the chitosan-based sulfate imprinted adsorption materials.更多还原