Pan Bingcai, Chen Xinqing, Pan Bingjun, Zhang Weiming, Zhang Xiao, Zhang Quanxing
State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210093, PR China.
J Hazard Mater. 2006 Sep 21;137(2):1236-40. doi: 10.1016/j.jhazmat.2006.04.016. Epub 2006 Apr 25.
A chloromethylated styrene-divinylbenzene copolymer was post-cross-linked through Friedel-Crafts reaction to get a macroreticular resin adsorbent NA-01, and then chemically modified by dimethylamine to obtain an aminated adsorbent NA-01A. Batch adsorption runs of p-nitrophenol from aqueous solution onto adsorbent NA-01A were conducted to evaluate the effect of amino group on adsorption. The adsorption capacity of p-nitrophenol on NA-01A increased noticeably by comparison with the mother adsorbent. A linear relationship was observed between the adsorption capacity of NA-01A caused by amination and the equilibrium concentration of p-nitrophenol in aqueous solution, which can be reasonably elucidated by a modified isotherm equation based on the Freundlich model. The breakthrough curves on both adsorbents were experimentally determined and also predicted by the mathematic model based on the non-linear wave propagation theory and the corresponding isotherm model. The model based on the Freundlich model gave a good prediction of the breakthrough curve on NA-01, but a deviation occurred for NA-01A when C/C0 less than 0.3. However, another model based on the modified isotherm equation provided a better prediction for the breakthrough curves on NA-01A.
通过傅克反应对氯甲基化苯乙烯 - 二乙烯基苯共聚物进行后交联，得到大孔网状树脂吸附剂NA - 01，然后用二甲胺进行化学改性，得到胺化吸附剂NA - 01A。进行了从水溶液中对吸附剂NA - 01A进行对硝基苯酚的间歇吸附实验，以评估氨基对吸附的影响。与母体吸附剂相比，对硝基苯酚在NA - 01A上的吸附容量显著增加。观察到胺化导致的NA - 01A吸附容量与水溶液中对硝基苯酚的平衡浓度之间存在线性关系，基于弗罗因德利希模型的修正等温方程可以合理地解释这种关系。通过实验测定了两种吸附剂上的穿透曲线，并基于非线性波传播理论和相应的等温模型用数学模型进行了预测。基于弗罗因德利希模型的模型对NA - 01上的穿透曲线预测良好，但当C/C0小于0.3时，NA - 01A出现偏差。然而，基于修正等温方程的另一个模型对NA - 01A上的穿透曲线提供了更好的预测。
