The Effect of Pre-Treatment Process on the Separation of Iron (Fe) and Manganese (Mn) Metals in Well Water in Lampoh DayaBanda Aceh City. IJEE [Internet]. 2026 Jan. 1 [cited 2026 Feb. 4];1(1):228-35. Available from: https://e-journal.scholar-publishing.org/index.php/ijee/article/view/205