Efektivitas Penurunan Kadar Besi pada Air Sumur Menggunakan Arang Aktif Tulang Kambing. SEMDI-UNAYA [Internet]. 2021 Oct. 31 [cited 2026 Oct. 17];4(1):196-203. Available from: https://jurnal.abulyatama.ac.id/index.php/semdiunaya/article/view/2515