中文摘要：

将壳聚糖与自制的纳米四氧化三铁反应，加入一定量的铜盐使其与壳聚糖络合，再用环氧氯丙烷交联，用酸洗脱铜离子，得到表面印迹的纳米磁性壳聚糖。考察了阴离子、交联剂浓度对铜印迹效果的影响。用振动磁力仪及透射电镜对样品的性质进行表征。研究了表面印迹的纳米磁性壳聚糖对Cu^2＋的吸附性能。研究结果显示，用硝酸铜印迹制备的表面印迹纳米磁性壳聚糖吸附剂平均粒径为25nm，饱和磁化强度为98．56emu／g，壳聚糖含量为18．7％。吸附剂吸附容量大，吸附速度快。在Cu^2＋初始浓度为3．91mmol／L，pH为5时，15min即达到吸附平衡，以壳聚糖计Cu^2＋的饱和吸附量为4．07mmol／g，比纯壳聚糖粉高2倍。在含Zn^2＋或Cd^2＋、Pb^2＋的二元体系溶液中，离子印迹吸附剂对Cu^2＋具有明显的选择吸附性，而未印迹的纯壳聚糖粉几乎没有选择性。吸附剂易回收，重复使用性好，重复使用4次后，吸附量约保留最初饱和吸附量的98％。

英文摘要：

Surface ion imprinting magnetic chitosan nanoparficles （MGC） were prepared by binding chitosan on the surface of magnetic nanoparticles （Fe3O4）, the chitosan was imprinted with Cu（Ⅱ） ions and cross-linked with epichlorohydrin. The influences of anions and concentration of epichlorohydrin on effects of imprinting were investigated. Structure of MGC was characterized with transmission electron microscopy （TEM） and vibrating specimen magnetometer （VSM）. The research results showed that： the mean diameter of the particles was about 25nm, saturation magnetization of MGC was 98.56emu/g, and the amount of chitosan on the MGC was 18.7%. When the initial concentration of Cu（Ⅱ） ion was 3.91mmol/L, adsorption equilibrium can be reached in 15min at pH 5, the maximum adsorption capacity for Cu（Ⅱ） ion was 4.07mmol/g based on the weight of chitosan, which is over 2 times of pure chitosan powder. In binary system solution containing Cd（II）, Zn（II） or Pb（II） ions, the sorbent has obvious choice adsorption of Cu（Ⅱ） ion compared with pure chitosan powder which almost has no selectivity. Sorbent was stable and easy recovery, the adsorption capacity was about 98% of the initial saturation adsorption capacity after being used four times.