哌嗪修饰XDA-200大孔树脂对诺氟沙星的吸附研究

Adsorption of norfloxacin on macroporous adsorption resins XDA-200 modified with piperazine groups

摘要:

通过对XDA-200大孔聚苯乙烯树脂进行哌嗪修饰制备了一种亲水性的NDA-201树脂，采用静态吸附的方法系统地研究了NDA-201对水溶液中诺氟沙星的静态吸附和脱附特征。结果表明，NDA-201树脂对诺氟沙星具有良好的吸附性能，在研究的浓度范围内， Langmuir和Freundlich等温吸附方程均能很好地拟合吸附平衡数据，吸附为放热的物理过程，吸附动力学符合Lagergren准二级速率方程，吸附速率受颗粒内扩散和液膜扩散双重作用。

Abstract:

By post-crosslinking reaction with piperazine , New poly(styreneiviny benzene) hypercrosslinked adsorption resins of NDA-201 were successfully prepared by chemical modification of macroporous resin of XDA-200. The static adsorption and desorption characteristics for norfloxacinin aqueous solution onto above adsorption resins were studied. A batch sorption experiments showed that NDA-201 resin had high adsorption capacities for norfloxacinin．Equilibrium adsorption data fitted to both Langmuir and Freundlich isotherms in the studied concentration range．Adsorption was exothermic arid basically of physical character．Kinetic analysis showed that the adsorption reaction could be approximated by a Lagergren pseudo-second-order-rate equation for which intraparticle diffusion was the essential rate-controlling step．