HIDAYAT, Hidayat; HADERIAH, Haderiah; ARIF, Muh. Ikbal. Comparative Effectiveness of Coconut Shell Charcoal and Rice Husk Ash as Adsorbents in Filtration Systems for Iron (Fe) and Manganese (Mn) Removal from Groundwater. Media Kesehatan Politeknik Kesehatan Makassar , [S. l.], v. 21, n. 1, p. 228–236, 2026. DOI: 10.32382/medkes.v21i1.2054. Disponível em: https://ojs3.poltekkes-mks.ac.id/index.php/medkes/article/view/2054. Acesso em: 30 jun. 2026.