Sari, Rahmaida, Muhammad Yerizam, and Robert Junaidi. “Pemanfaatan Fly Ash Batubara Dalam Penurunan Kadar Besi Dan Mangan Limbah Air Asam Tambang PT Bukit Asam”. Innovative: Journal Of Social Science Research 4, no. 5 (September 1, 2024): 688–701. Accessed August 25, 2026. https://j-innovative.org/index.php/Innovative/article/view/13362.