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, [S. l.], v. 6, n. 2, p. 71–78, 2024. DOI: 10.33019/jstk.v6i2.4301. Disponível em: https://journal.ubb.ac.id/index.php/stannum/article/view/4301. Acesso em: 25 oct. 2025.