苯的衍生物在活性炭/水界面上的吸附标准自由能及与其分子结构的关系

测定了25℃时活性炭自水中吸附苯、苯酚、苯胺、对－氯苯酚、苯甲酸、对－羟基苯甲酸、对－氯苯胺、硝基苯、对－氨基苯甲酸、对－硝式苯酚、对－硝基苯胺、对硝基苯甲酸的等温线，它们的等温线均为Langmuir型的，利用Langmuir参数计算了吸吸标准自由能变化△G^0，计算结果表明，△G^0具有加和性，即化合物的△G^0是组成该化合物各基团贡献之总和，化合物的分子量及分子连接性指数与△G^0有近似的线性关系。

The relationship between changes of standard free energy in adsorption and molecular structure of benzene derivates

The adsorption isotherms of benzene, phenol, aniline, p-chloroaniline, benzoic acid, p-hydroxybonzoic acid, p-chlorophe-nol, nitrobenzene, p-aminobenzoic acid, p-nitrophenol, p-nitroaniline, p-nitrobenzoic acid from water onto active carbon were determined at 25℃. The isotherms can be represented by the Langmuir equation. The change of standard free energy △G0 in adsorption process was calculated from Langmuir parameters. The calculated results showed that each functional group can be assumed to make its own contribution to △G0 of a molecule. The relationship of the molecular weight, and the molecular connectivity index to the △G0 was tested.