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以Fe3O4为磁核,环氧氯丙烷为交联剂,制备了磁性交联壳聚糖微球(MCB),采用FT-IR和VSM对MCB进行表征,结果表明,Fe3O4被壳聚糖包埋,制备的MCB的饱和磁化强度为12.8emu/g。其交联度、溶胀度和含水量分别为85.2%、6.94%和80.1%。同时研究了MCB对Cu2+的吸附性能,研究表明:MCB对Cu2+的吸附的最佳pH值为5,MCB对Cu2+的吸附符合Langmuir方程,为单分子层吸附,最大吸附容量为64.6mg/g;动力学研究表明,MCB对Cu2+的吸附过程符合准二级动力学方程。MCB再生-重复使用8次,其吸附容量没有明显的降低。
Magnetic cross-linked chitosan microspheres (MCB) were prepared by using Fe3O4 as magnetic core and epichlorohydrin as crosslinking agent. MCB was characterized by FT-IR and VSM. The results showed that Fe3O4 was embedded in chitosan , The prepared MCB had a saturation magnetization of 12.8 emu / g. The degree of crosslinking, swelling degree and water content were 85.2%, 6.94% and 80.1% respectively. The adsorption of Cu2 + by MCB was also studied. The results showed that the optimal adsorption of Cu2 + by MCB was 5 and the adsorption of Cu2 + by MCB was Langmuir equation. The maximum adsorption capacity was 64.6mg / g for monolayer adsorption. Kinetic studies show that the adsorption of Cu2 + by MCB conforms to quasi-second order kinetic equation. MCB regeneration - repeated use 8 times, its adsorption capacity did not significantly reduce.