刚果红在壳聚糖/蒙脱石纳米复合材料上的吸附特性
Adsorption characteristics of Congo Red onto the chitosan/montmorillonite nanocomposite.
作者信息
Wang Li, Wang Aiqin
机构信息
Center of Eco-material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China.
出版信息
J Hazard Mater. 2007 Aug 25;147(3):979-85. doi: 10.1016/j.jhazmat.2007.01.145. Epub 2007 Feb 9.
A series of biopolymer chitosan/montmorillonite (CTS/MMT) nanocomposites were prepared by controlling the molar ratio of chitosan (CTS) and montmorillonite (MMT). The nanocomposites were characterized by FTIR and XRD. The effects of different molar ratios of CTS and MMT, initial pH value of the dye solution and temperature on adsorption capacities of samples for Congo Red (CR) dye have been investigated. The adsorption capacities of CTS, MMT and CTS/MMT nanocomposite with CTS to MMT molar ratio of 5:1 for CR were compared. The results indicated that the adsorption capacity of CTS/MMT nanocomposite was higher than the mean values of those of CTS and MMT. The adsorption kinetics and isotherms were also studied. It was shown that all the sorption processes were better fitted by pseudo-second-order equation and the Langmuir equation.
通过控制壳聚糖（CTS）和蒙脱石（MMT）的摩尔比，制备了一系列生物聚合物壳聚糖/蒙脱石（CTS/MMT）纳米复合材料。采用傅里叶变换红外光谱（FTIR）和X射线衍射（XRD）对纳米复合材料进行了表征。研究了CTS与MMT的不同摩尔比、染料溶液的初始pH值和温度对样品对刚果红（CR）染料吸附容量的影响。比较了CTS、MMT以及CTS与MMT摩尔比为5:1的CTS/MMT纳米复合材料对CR的吸附容量。结果表明，CTS/MMT纳米复合材料的吸附容量高于CTS和MMT吸附容量的平均值。还研究了吸附动力学和等温线。结果表明，所有吸附过程均能更好地用准二级方程和朗缪尔方程拟合。
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