离子交换纤维对低浓度二甲胺水溶液吸附性能研究

对离子交换纤维(IEF)吸附二甲胺(DMA)的特性进行了研究。等温吸附线研究表明,离子交换纤维对二甲胺的吸附符合Freundlich和Langmuir等温吸附方程。热力学研究表明,Freundlich模型可以很好地模拟二甲胺在离子交换纤维上的交换行为,交换反应的ΔG0,ΔH0,ΔS0,交换过程为自发的吸热过程。动力学研究表明,离子交换纤维对二甲胺的吸附以液膜扩散为主,其交换行为可采用Boyd液膜扩散方程描述。

Research on Adsorption Performance of Ion Exchange Fiber to Dimethylamine Aqueous Solution of Low Concentration

The adsorption performance of ion exchange fiber （IEF） to dimethylamine （DMA） was investigated. The isothermal adsorption curve studies show that the adsorption of IEF to DMA accords with Freundlich-type and Langmuir-type isothermal adsorption equations, The thermodynamic studies show that the Freundlich model can simulate well the exchange behavior of DMA on IEF. In the exchange reaction, △G 〈0, △H〉0 and△S〉0. The exchange process is spontaneous and endothermic. The kinetics studies show that the adsorption of the IEF to,DMA is mainly based on liquid film diffusion, its exchange behavior can be described by Boyd film diffusion equation.