“THE EFFECT OF MASS AND PH ON DECREASING CHEMIXAL OXYGENT DEMAND (COD) ON PALM OIL MILL EFFLUENT (POME) BY CACAO SHELL ADSORBENT”. Stannum : Jurnal Sains dan Terapan Kimia 7, no. 2 (November 4, 2025): 54–59. Accessed November 7, 2025. https://journal.ubb.ac.id/index.php/stannum/article/view/3781.