“Activated Carbon from Sugarcane (Saccharum Officinarum L.) Bagasse for Removal Ca2+ and Mg2+ Ion from Well Water”. Stannum : Jurnal Sains dan Terapan Kimia 2, no. 2 (October 31, 2020): 57–67. Accessed April 25, 2026. https://www.journal.ubb.ac.id/index.php/stannum/article/view/1877.