采用溶液插层法制备了壳聚糖/蒙脱土插层复合物,以此复合物为活性红染料RR136的吸附剂,考察了复合物中壳聚糖与蒙脱土的摩尔比、染料溶液pH和浓度、温度及吸附剂用量等因素对吸附动力学行为的影响.运用红外光谱和扫描电镜对吸附RR136前后的吸附剂进行了表征,探讨了染料分子与吸附剂之间的相互作用,研究了吸附剂的再生性能.结果表明,壳聚糖/蒙脱土插层复合物对RR136的吸附更符合拟二级动力学方程,RR136在该复合物上的吸附速率受颗粒外扩散过程的控制.连续进行15次吸附/再生循环后,吸附剂的吸附容量和再生率分别为266.27 mg·g-1和60.5%,表明插层复合物吸附剂具有较好的再生重复使用潜力.
The chitosan/montmorillonite (CTS/MMT) intercalation composites were prepared by polymer solution intercalation. The effects of molar ratio of CTS to MMT, initial pH, concentration of the dye solution ,temperature and mass of adsorbent on the adsorption kinetics for Reactive Red 136 (RR136) dye have been investigated in detail. The structures of intercalation composites before and after adsorption of RR 136 were characterized by SEM and FI'IR. The regeneration performance of the adsorbent was studied. The results showed that all the adsorption processes were better fitted by the pseudo-second-order equation, indicating that the rate of adsorption is determined mainly by external particle diffusion process. After 15 times consecutive adsorption/regeneration, adsorption capacity and regeneration efficiency was 266.27 mg·g^-1 and 60.5 % , respectively, which indicated that the intercalation compound adsorbent has good regeneration and reuse potential.