“Effectiveness of the Combination of Alum (Al₂(SO₄)₃) and Calcium Hydroxide (Ca(OH)₂) Coagulants in the Removal of Manganese (Mn) Using the Coagulation-Flocculation Process: Efektivitas Kombinasi Koagulan Alum (Al2(SO4)3) Dan Kalsium Hidroksida (Ca(OH)2) Pada Penghilangan Logam Mangan (Mn) Menggunakan Proses Koagulasi-Flokulasi”. Stannum : Jurnal Sains dan Terapan Kimia 6, no. 2 (October 31, 2024): 71–78. Accessed October 25, 2025. https://journal.ubb.ac.id/index.php/stannum/article/view/4301.