Biosorption of Methylene Blue on Sodium Hydroxide-Treated Oil Palm Trunk: Characterisation, Isotherm, and Kinetic Studies. JOMALISC [Internet]. 2023 Nov. 25 [cited 2026 Jul. 15];2(2):154-6. Available from: https://jomalisc.utm.my/index.php/jomalisc/article/view/44