Palm shell charcoal (Elaeis guineensis Jacq.) has the potential to be used as an adsorbent to adsorb Escherichia coli (E. coli), however its adsorption efficiency is relatively small. Therefore, to increase its adsorption efficiency in this study palm shell charcoal will be activated with ZnCl2 to adsorb E. coli with the batch method. The aim of this study was to analyze the concentration of Zn…