在超高交联树脂上负载不同的胺基,制备了3种不同质量摩尔浓度的胺基修饰的吸附树脂,研究了水体系中苯酚和苯胺的静态吸附动力学性质,考察了温度和起始质量浓度对吸附的影响.结果表明:胺化超高交联吸附树脂对苯酚吸附时,物理吸附和化学吸附同时进行,而树脂对苯胺的吸附氢键作用较弱,主要依靠物理吸附;随着吸附树脂中胺基质量摩尔浓度的增大,树脂比表面积逐渐降低,树脂孔道内的胺基基团对吸附产生阻隘,吸附速率降低;Lagergren模型和Kannan-Sundaram模型都能较好地拟合吸附过程,相关系数均大于0.98,Kannan-Sundaram模型拟合吸附过程时,所有直线均不经过原点,表明颗粒内扩散和膜扩散均是速率控制步骤之一.
Three types of aminated-hypererosslinked polymeric adsorbents were successfully prepared. The static dynamics of adsorption for phenol and aniline onto adsorbents from aqueous solution were stu- died. Effects of temperature and initial concentration on the adsorption were also investigated. The results show that the adsorption of phenol is pushed by physical and chemical interaction, while the adsorption of aniline is mainly pushed by physical interaction. The specific surface area of adsorbent decreases with the increasing of amido content, leading to the block within the resin pore by amido and decreasing of diffusion rate constant. The correlation coefficient is over 0. 98, which shows that both of Lagergren and Kannan-Sundaram models can illuminate the adsorption process very well. All regressing curves by Kannan-Sundaram model are not through origin of coordinates, which indicates that the adsorption rate is affected by diffusion inside particulate and diffusion of membrane.