Durian peel (Durio zibethinus Murr.) has the potential to be used as a biosorbent in the form of activated charcoal because it contains 50-60% cellulose and its adsorption capacity can be increased by activation. The activation carried out in this study used NaOH with varying activator concentrations (0.1; 0.2; 0.3 and 0.4 M) so that it is hoped that the optimum activator concentration can expa…