[Objective] The aim of the study was to use GAC (Granular activated carbon) for adsorption treatment of wastewate containing 4-chlorophenol. [Method]The adsorption process of 4-chlorophenol in simulated wastewater by GAC was studied. [Result] Under 30 ℃and the 150r/min of shaker speed,the time of the granular activated carbon on 4-chlorophenol adsorption equilibrium was 6 hours. The experimental data was regressed by langemuir and freundlich isotherm models. The adsorption behavior of granular activated car...