National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing, 100083, China E-mail:
Water Sci Technol. 2014;69(9):1798-804. doi: 10.2166/wst.2014.039.
Na-montmorillonite (Na-Mont) and organic montmorillonite modified by cetyltrimethylammonium bromide (CTAB-Mont) and tetramethylammonium bromide (TMAB-Mont) were prepared as adsorbents to remove organic contaminants from 2,4,6-trinitrotoluene (TNT) red water. The characterizations of the samples were performed with X-ray diffraction and Fourier transform infrared spectroscopy. The adsorption capacity of CTAB-Mont (15.9 mg/g) was much larger than Na-Mont (0.26 mg/g) and TMAB-Mont (1.7 mg/g). Langmuir isotherm and the pseudo-second-order kinetic models fitted the experimental results well. The main factor in the adsorption promotion was the distribution phase in the interlayer of CTAB-Mont. The arrangement of molecules analyzed by molecular simulation corresponded to the experimental data and supported the adsorption mechanism.
钠蒙脱石（Na-Mont）和用十六烷基三甲基溴化铵（CTAB-Mont）和四甲基溴化铵（TMAB-Mont）改性的有机蒙脱石被制备为吸附剂，以从 2,4,6-三硝基甲苯（TNT）红色废水中去除有机污染物。用 X 射线衍射和傅里叶变换红外光谱对样品进行了表征。CTAB-Mont（15.9 mg/g）的吸附容量远大于 Na-Mont（0.26 mg/g）和 TMAB-Mont（1.7 mg/g）。Langmuir 等温线和拟二级动力学模型很好地拟合了实验结果。吸附促进的主要因素是 CTAB-Mont 层间的分配相。通过分子模拟分析的分子排列与实验数据相对应，并支持吸附机制。
