Sembiring JB, Sylvia D, Pohan MSA. Development of a Peanut Shell-Derived Chitosan–Activated Carbon Composite as a Sustainable Adsorbent for Permanganate (MnO₄⁻) Removal from Aqueous Solution. HJKK [Internet]. 2026 Aug. 31 [cited 2026 Sep. 8];14(4). Available from: https://e-journal.undikma.ac.id/index.php/hydrogen/article/view/21354