Fajar, Mutiara, Ruth Angreni Limbong, and Resarizki Utami. “TUDY N HE FFECTIVENESS F CTIVATED ARBON OR EDUCING ARDNESS ND RON (FE) ONTENT N ELL ATER”. Lingkar: Journal of Environmental Engineering 5, no. 1 (June 30, 2023): 1–9. ccessed November 23, 2024. https://journal33.ar-raniry.ac.id/lingkar/article/view/6006.