离子交换纤维对偏二甲肼的吸附性能

以火箭推进剂主要成分偏二甲肼为研究对象，通过配制模拟水样，采用强酸阳离子交换纤维对其中的偏二甲肼进行吸附，研究了偏二甲肼在离子交换纤维上的等温吸附线、吸附动力学和动态吸附，并将其动态吸附效果与732强酸阳离子交换树脂进行了对比. 结果表明，强酸阳离子交换纤维对偏二甲肼的吸附以液膜扩散为主，符合Boyd液膜扩散方程. 在291 K和研究的浓度范围内，离子交换纤维对偏二甲肼的吸附符合Freundlich等温吸附方程. 动态吸附结果表明，离子交换纤维对偏二甲肼的交换吸附速率大于离子交换树脂. 离子交换纤维柱的利用率高，相同条件下的处理量是树脂的3.86倍.

Adsorption Properties of Cation Ion-exchange Fiber for UDMH

Unsymmetrical dimethyl hydrazine (UDMH) and other liquid propellants are widely used in many countries, it causes environmental pollutions and is proved to be toxic to mankind. A kind of strong acid cation ion exchange fiber (IEF) was used to adsorb UDMH in this work. Adsorption behaviors were studied by using static and dynamic adsorption methods. Experimental results show that the kinetics of adsorption behavior of the fiber is mainly controlled by film diffusion process. It obeys the Boyd's film diffusion equation. Adsorption reaction rate increases with the increase of temperature. Equilibrium data for the adsorption of UDMH are correlated by Freundlich isotherm equation. Dynamic adsorption results show that the adsorption rate of IEF to UDMH is greater than that of resin, and the former adsorption capacity is 3.86 times larger than that of the latter. This kind of IEF can be used to treat wastewater of UDMH in higher flow velocity condition.