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采用X射线衍射谱和红外吸收光谱分析膨润土对于葡萄糖分子的吸附特性,研究了膨润土的吸附等温线。同时,探究了膨润土与葡萄糖溶液的接触时间及溶液的初始pH值等对于膨润土吸附作用的影响。以Freundlich模型为基础对等温线数据进行拟合和分析。结果表明:在水溶液条件下,膨润土中的主要成分为蒙脱石,在其层间能够吸附葡萄糖分子;随着初始溶液pH值的增加,膨润土对于葡萄糖分子的吸附能力逐渐增强,吸附效率逐渐提高。
Adsorption characteristics of bentonite to glucose molecules were analyzed by X-ray diffraction and infrared absorption spectroscopy. The adsorption isotherms of bentonite were studied. At the same time, the effect of the contact time between bentonite and glucose solution and the initial pH of the solution on the sorption of bentonite was investigated. The isotherm data were fit and analyzed on the Freundlich model. The results showed that under the condition of aqueous solution, the main component of bentonite is montmorillonite, and glucose molecules can be adsorbed between the layers. With the initial solution pH increasing, the adsorption capacity of bentonite to glucose molecules gradually increases, and the adsorption efficiency gradually increases .