The study aims to prepare the activated carbon from coconut shells for trichloroethylene adsorption in synthetic wastewater The effects of temperature, time of carbonization phosphoric acid concentration and time of activation to the properties of activated carbon such as density, moisture content, ash and iodine numbers were studied. It was found that the optimum conditions of carbonization was 500 ๐C for 60 minutes The carbon was activated by phosphoric acid (H3PO4) in the ratio was 1:3 of carbon to activator at concentration of phosphoric acid of 60 percent by volume for 120 minutes This the highest condition obtained iodine number of 737.77 mg/g From the using of activated carbon for trichloroethylene adsorption in synthetic wastewater with the initial concentration of trichloroethylene 2476.20 ppm it was found that the carbon content of 30 g absorbed for 45 minutes showed the highest efficiency of adsorption at 57.24 percent