Zhang Xiao, Li Aimin, Jiang Zhenmao, Zhang Quanxing
School of the Environment, and State Key Laboratory of Pollution Control and Resources Reuse, Nanjing University, Nanjing 210093, PR China.
J Hazard Mater. 2006 Sep 21;137(2):1115-22. doi: 10.1016/j.jhazmat.2006.03.061. Epub 2006 Apr 18.
Batch adsorption runs of two commercial reactive dyes (methylene blue and reactive orange X-GN) and phenol from water onto two resin adsorbents (Amberlite XAD-4, a macroreticular adsorbent and ZCH-101, a hyper-cross-linked adsorbent) were carried out in the present study. Effect of adsorbate size and pore structure of the resin adsorbents on adsorption was discussed and Langmuir and Freundlich models were tested for the relevant adsorption isotherms. In the kinetic section concentration-time profiles were obtained to further elucidate the effect of adsorbate size and porous structure on adsorption mechanism. A pseudo-second-order model was proved to give a satisfactory description of the related kinetic results. Two-stage kinetic curve of methylene blue onto ZCH-101 was observed at a specific experimental condition and modeled schematically according to its specific pore size distribution. Furthermore, other kinetic experiments were performed at different ambient temperature to validate the proposed schematic model.
本研究进行了两种商业活性染料（亚甲基蓝和活性橙X-GN）以及苯酚从水中吸附到两种树脂吸附剂（大孔吸附剂Amberlite XAD-4和超交联吸附剂ZCH-101）上的批次吸附实验。讨论了吸附质大小和树脂吸附剂孔结构对吸附的影响，并对相关吸附等温线测试了朗缪尔和弗伦德里希模型。在动力学部分，获得了浓度-时间曲线，以进一步阐明吸附质大小和多孔结构对吸附机理的影响。结果表明，准二级模型能够很好地描述相关动力学结果。在特定实验条件下，观察到亚甲基蓝在ZCH-101上的两段动力学曲线，并根据其特定的孔径分布进行了示意性建模。此外，在不同环境温度下进行了其他动力学实验，以验证所提出的示意性模型。
