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用十六烷基三甲基溴化铵(CTAB)为修饰剂,对活性白土进行修饰改性。将改性后的活性白土与壳聚糖复合,通过溶液插层技术制备了活性白土/壳聚糖复合物。通过红外光谱仪(FT-IR)、热重分析仪(TGA)、X射线衍射仪(XRD)和透射电子显微镜(TEM)对所制备的活性白土/壳聚糖复合物进行表征。以对甲基橙的吸附行为作为模拟吸附实验,研究了活性白土/壳聚糖复合物的吸附性能,探讨了温度、复合吸附剂用量、甲基橙溶液浓度、吸附时间等条件对吸附剂吸附效果的影响。结果显示:修饰剂和壳聚糖显著提高了活性白土的片层间距,从而有利于提高活性白土的吸附性能。在吸附时间为30min、温度为25℃、吸附剂用量为0.06g的条件下,吸附剂具有较为优异的吸附效果。
Cetyltrimethylammonium bromide (CTAB) was used as modifier to modify and modify the activated clay. The modified activated clay and chitosan were complexed and the activated clay / chitosan composite was prepared by solution intercalation. The prepared activated clay / chitosan complex was characterized by FT-IR, TGA, XRD and TEM. Adsorption behavior of methyl orange was used as a simulated adsorption experiment to study the adsorption properties of activated clay / chitosan complex. The effects of temperature, the amount of composite adsorbent, the concentration of methyl orange solution and the adsorption time on the adsorption of adsorbent Effect of effect. The results show that the modifier and chitosan can significantly increase the lamellar spacing of activated clay so as to improve the adsorption capacity of activated clay. Under the condition of adsorption time of 30min, temperature of 25 ℃ and amount of adsorbent of 0.06g, the adsorbent has more excellent adsorption effect.