运用化学共沉淀法，以FeCl2·4H2O和FeCl3·6H2O为原料，

运用化学共沉淀法，以FeCl2·4H2O和FeCl3·6H2O为原料，在碱性条件下制得四氧化三铁纳米粒子，粒径为15纳米。以壳聚糖和一氯乙酸为原料，在碱性条件下制得N,O-羧甲基壳聚糖，然后以戊二醛作为交联剂，将制得的四氧化三铁纳米粒子分散在N，O-羧甲基壳聚糖水溶液中，形成磁流体，将磁流体分散到含司班80和吐温80的液体石蜡连续相中，得到N，O-磁性羧甲基壳聚糖微球。将上述制得的材料进行红外光谱、X射线衍射、扫描电镜、热重分析以及原子吸收光谱进行表征和吸附性能的测试。

运用化学共沉淀法，以FeCl2·4H2O和FeCl3·6H2O为原料，在碱性条件下制得四氧化三铁纳米粒子，粒径为15纳米。 以壳聚糖和一氯乙酸为原料，在碱性条件下制得N,O-羧甲基壳聚糖，然后以戊二醛作为交联剂，将制得的四氧化三铁纳米粒子分散在N，O-羧甲基壳聚糖水溶液中，形成磁流体，将磁流体分散到含司班80和吐温80的液体石蜡连续相中，得到N，O-磁性羧甲基壳聚糖微球。 将上述制得的材料进行红外光谱、X射线衍射、扫描电镜、热重分析以及原子吸收光谱进行表征和吸附性能的测试。

Fe3O4 nanoparticles with a diameter of 15 nm were prepared by chemical coprecipitation method with FeCl2 · 4H2O and FeCl3 · 6H2O as raw materials under alkaline conditions. N, O-carboxymethyl chitosan was prepared from chitosan and monochloroacetic acid in alkaline condition. Then, using glutaraldehyde as crosslinking agent, Fe3O4 nanoparticles were dispersed in N, O-carboxymethyl chitosan aqueous solution to form magnetic fluid. The magnetic fluid was dispersed into liquid paraffin continuous phase containing span 80 and Tween 80 to obtain n, o-magnetic carboxymethyl chitosan microspheres. The materials were characterized by IR, XRD, SEM, TGA and AAS.<br>