Effect of salt on the mechanism of adsorption of aromatics on activated carbon

被引：112

作者：

Arafat, HA ^{[1
]}

Franz, M ^{[1
]}

Pinto, NG ^{[1
]}

机构：

[1] Univ Cincinnati, Dept Chem Engn, Cincinnati, OH 45219 USA

来源：

LANGMUIR | 1999年 / 15卷 / 18期

关键词：

D O I：

10.1021/la9813331

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The effect of KCl on the adsorption of phenol, toluene, and benzene on activated carbon, with different degrees of surface oxygenation, was investigated. Different trends of salt effect were observed for each compound. The observed KCl effects were interpreted on the basis of electrical charge neutralization on the carbon surface and the adsorbate molecules, water adsorption, and the "salt out" effect. In particular, water adsorption was found to be crucial in reducing the adsorption capacity of the activated carbon. The influence of water adsorption was more pronounced on carbon surfaces with higher amounts of oxygen-containing groups. This was additionally confirmed by measurements using flow microcalorimetry.

引用

页码：5997 / 6003

页数：7

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