Abstract: Adsorption behavior of a number of aromatic compounds on an activated carbon was investigated in static state system, and the adsorption data were fitted using Langmuir model. It is found that adsorption behavior of aromatics on activated carbon is approximately described by Langmuir model, solubility and/or polarity of the compounds have major influences on the adsorption, and π－π dispersion interaction plays little role in the adsorption.