Hidayat H, Haderiah H, Arif MI. Comparative Effectiveness of Coconut Shell Charcoal and Rice Husk Ash as Adsorbents in Filtration Systems for Iron (Fe) and Manganese (Mn) Removal from Groundwater. med [Internet]. 2026 Jun. 29 [cited 2026 Jun. 30];21(1):228-36. Available from: https://ojs3.poltekkes-mks.ac.id/index.php/medkes/article/view/2054