研究了不同温度下,大孔吸附树脂DA201-CⅡ对水溶液中纯组分的苯酚、苯胺、对氯苯酚、对氯苯胺,混合组分的苯酚-苯胺、对氯苯酚-对氯苯胺的静态吸附行为.结果表明,在考察温度与浓度范围内,纯组分的吸附等温线符合Freundlich方程,吸附量顺序为苯酚〈苯胺〈对氯苯酚〈对氯苯胺;混合体系中各组分的吸附数据也可以用Freundlich模型很好地拟合.与相同平衡浓度的纯组分吸附相比,苯酚-苯胺混合溶液中两种分子共存会增加该体系的总吸附量;而对氯苯酚-对氯苯胺体系的总吸附量降低,小于纯组分对氯苯胺的量.同时,分析了吸附热力学函数和各吸附现象的原因.
The static equilibrium adsorption of phenol,aniline,p-chlorophenol,p-chloroaniline in the pure component system,and phenol—aniline,p-chlorophenol—p-chloroaniline in the two-component system on DA201-CⅡwere investigated at different temperatures.The results show that all the adsorption isotherms of pure component system are correlated with Freundlich equation within the studied range of temperature and concentration,and that the adsorption capacity follows the order phenolanilinep-chlorophenolp- chloroaniline.The adsorption data of each component in the two-component systems also fit Freundlich model.In comparison with the adsorption of the pure component system at the same equilibrium concentration,the coexistence of phenol and aniline molecules in aqueous solution will heighten the total adsorbed amounts of this binary solutes system,while the total uptakes from p-chlorophenol—p- chloroaniline system decrease,lower than those from single p-chloroaniline.Moreover,the adsorption thermodynamics of aromatic compounds and reasons for every adsorption phenomenon were analyzed.