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通过表面活性剂十六烷基三甲基溴化铵(CTAB)对活性白土进行化学改性,并与壳聚糖(CS)复合制备活性白土/CS复合物。利用红外光谱仪、热重分析仪、X-射线衍射仪和透射电子显微镜对活性白土/CS复合物的结构、热稳定性能和形貌进行表征。考察了活性白土/CS复合物对苯系污染物的吸附性能,结果表明:对苯酚、苯甲酸和苯酐的吸附率分别达到72.43%、83.41%和70.86%。优于单一吸附剂对苯系污染物的吸附性能,显示了活性白土/CS复合物良好的吸附行为。
The activated clay was chemically modified by the surfactant cetyltrimethylammonium bromide (CTAB) and the activated clay / CS composite was prepared by complexing with chitosan (CS). The structure, thermal stability and morphology of the activated clay / CS composite were characterized by infrared spectroscopy, thermogravimetry, X-ray diffraction and transmission electron microscopy. The adsorption properties of activated clay / CS composite on benzene-based pollutants were investigated. The results showed that the adsorption rates of phenol, benzoic acid and phthalic anhydride reached 72.43%, 83.41% and 70.86% respectively. Which is better than that of a single adsorbent on benzene-based pollutants, showing good adsorption behavior of the activated clay / CS composite.