White jabon fruit powder (Anthochepalus cadamba Miq.) combined with humic acid from peat water has the potential to be used as a biosorbent in absorbing Crystal Violet dye. Jabon puith fruit is used as a biosorbent because of the cellulose content contained in the jabon fruit itself. The combination with humic acid aims to increase the active sites of the biosorbent in absorbing Crystal Violet …