To improve the performance of wet oxidation for the regeneration of GAC, a microwave assisted wet peroxide oxidation process has been applied for the regeneration of 4-chlorophenol exhausted GAC. The effects of various factors including reaction temperature, H2O2 dosage, reaction time, and addition of catalyst have been studied. The regeneration improves with the increase in reaction temperature, H2O2 dosage, and reaction time. The addition of Cu2+ further promotes the regeneration process. Under the conditions of temperature 150 degrees C, H2O2 dosage 15mmol, reaction time 20min, Cu2+ concentration 20mg/L, the regenerated GAC recovers 93.5% of its adsorption capacity. A nearly complete degradation of 4-chlorophenol in the aqueous phase is observed based on UV-vis and high-performance liquid chromatography spectra studies.