等离子体接枝法制备PET-g-AM纤维的铜离子吸附性能研究

Research of Cu2+ adsorption by PET-g-AM prepared by plasma grafting

考察了丙烯酰胺接枝改性聚酯纤维(PET-g-AM)的吸附性能,研究了改性纤维作为吸附剂对水溶液中Cu2+的吸附过程,探讨了溶液pH、吸附温度、吸附时间、Cu2+初始质量浓度对吸附量的影响。采用Freundlich、Langmuir等温吸附方程和准一级动力学、准二级动力学模型进行模拟,结果表明,改性后的聚酯纤维对Cu2+具有良好的吸附效果,吸附过程符合Freundlich方程和准二级动力学模型。

The adsorption of graft modified polyester fibers with acrylamide (PET-g-AM) were studied. The adsorption process of Cu^2+ in aqueous solution by modified fibers as adsorbents was studied. The effects of solution pH, adsorption temperature and time, initial mass concentration of Cu^2+ on adsorption capacity were discussed. Freundlich, Langmuir isothermal adsorption equation, quasi first-order kinetics and quasi-second-order kinetics model were used for simulation. The results showed that the modified polyester fibers had good adsorption effect to Cu^2+ and the adsorption equilibrium process conformed to Freundlich model and quasi-sec ond-order kinetics model.