物理化学新实验“累托石对亚甲基蓝吸附”的研究

Study on the adsorptive properties of rectorite to methylene blue

累托石对染料污染物亚甲基蓝有着良好的吸附作用,其吸附行为可用Langmuir吸附等温式描述;常温下累托石对亚甲基蓝吸附速率快,符合准二级吸附动力学模型;通过测定吸附平衡分配系数还可计算吸附过程热力学函数的变化。本实验验证了界面化学、动力学和热力学中的重要基础知识,是一个综合性、基础性和研究性兼具的物理化学新实验。

Rectorite can easily remove methylene blue dye from aqueous solution and the isotherm data followed the Langmuir model. The adsorption processes were rapid and the kinetic adsorption fitted the quasi-second order kinetic equation well. The Adsorption thermodynamic parameters can be calculated by the equilibrium solute partition coefficient. This experiment can help students to learn the basic the-ory in physical chemistry including surface chemistry, kinetic, and thermodynamic, which can be de-signed as a new comprehensive and feasible fundamental experiment for college students.