Huang Ruihua, Liu Qian, Zhang Lujie, Yang Bingchao
College of Science, Northwest A&F University, Yangling, Shaanxi 712100, China E-mail:
Xi'an Institute of Geology and Mineral Resource, Xi'an, Shaanxi 710054, China.
Water Sci Technol. 2015;71(2):174-82. doi: 10.2166/wst.2014.478.
A kind of biocomposite was prepared by the intercalation of chitosan in bentonite and the cross-linking reaction of chitosan with glutaraldehyde, which was referred to as cross-linked chitosan/bentonite (CCS/BT) composite. Adsorptive removal of methyl orange (MO) from aqueous solutions was investigated by batch method. The adsorption of MO onto CCS/BT composite was affected by the ratio of chitosan to BT and contact time. pH value had only a minor impact on MO adsorption in a wide pH range. Adsorption kinetics was mainly controlled by the pseudo-second-order kinetic model. The adsorption of MO onto CCS/BT composite followed the Langmuir isotherm model, and the maximum adsorption capacity of CCS/BT composite calculated by the Langmuir model was 224.8 mg/g. Experimental results indicated that this adsorbent had a potential for the removal of MO from aqueous solutions.
通过壳聚糖插层到膨润土中以及壳聚糖与戊二醛的交联反应制备了一种生物复合材料，称为交联壳聚糖/膨润土（CCS/BT）复合材料。采用分批法研究了从水溶液中吸附去除甲基橙（MO）的情况。MO在CCS/BT复合材料上的吸附受壳聚糖与膨润土的比例以及接触时间的影响。在较宽的pH范围内，pH值对MO吸附的影响较小。吸附动力学主要由准二级动力学模型控制。MO在CCS/BT复合材料上的吸附遵循Langmuir等温线模型，通过Langmuir模型计算得到的CCS/BT复合材料的最大吸附容量为224.8 mg/g。实验结果表明，这种吸附剂具有从水溶液中去除MO的潜力。
