This research uses palm oil shells as raw material for making active carbon. Activated carbon was activated using 10% H3PO4 and modified using Co(OH)2. The obtained pHPZC value is at pH 7, so the adsorption in this study was conducted at pH 8. In this research, adsorption was determined from adsorption kinetics and adsorption isotherms. Based on the results of XRD, FTIR electron microscope and …