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

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

:测定了 2 5℃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 硝基苯酚、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参数计算了吸附标准自由能变化ΔG0 .计算结果表明 ,ΔG0 具有加和性 ,即化合物的ΔG0 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ΔG0

The adsorption isotherms of benzene, phenol, aniline, p\|chloroaniline, benzoic acid, p\|hydroxybenzoic acid, p\|chlorophenol, 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 Δ G 0 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 Δ G 0 of a molecule. The relationship of the molecular weight, and the molecular connectivity index to the Δ G 0 was tested.