Effect of salt on the mechanism of adsorption of aromatics on activated carbon
Effect of salt on the mechanism of adsorption of aromatics on activated carbon
复制标题
DOI：
10.1021/la9813331
复制
发表时间：
1999-08-31
期刊：
影响因子：
3.9
通讯作者：
Pinto, NG
中科院分区：
文献类型：
--
作者：
Arafat, HA;Franz, M;Pinto, NG
考察了氯化钾对苯酚、甲苯和苯在不同表面氧化程度的活性碳上吸附的影响。每种化合物的盐效应变化趋势不同。观察到的KCl效应是基于碳表面和吸附分子上的电荷中和、水吸附和“盐析”效应来解释的。特别是，水的吸附被发现是降低活性碳吸附能力的关键。水吸附的影响在含氧基团含量较高的炭表面更为明显。用流动微量热法进行的测量进一步证实了这一点。
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.