Hidayat, H., Haderiah, H., & Arif, M. I. (2026). 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 , 21(1), 228–236. https://doi.org/10.32382/medkes.v21i1.2054