The Effect of Calcination Temperature Variation In Pineapple Leaf Adsorbent Preparation On Methylene Blue Adsorption Using NaCl Activator. sinafi [Internet]. 2026 Feb. 23 [cited 2026 Apr. 16];4(1):39-54. Available from: https://proceedings.fisikaupi.id/index.php/sinafi/article/view/6