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