10.18453/rosdok_id00004520 Geleta, Wondwosen Sime Wondwosen Sime Geleta http://d-nb.info/gnd/1315260956 https://orcid.org/0000-0002-2879-9622 Universität Rostock 2023 620 Engineering & allied operations 660 Chemical engineering 2023 en https://purl.uni-rostock.de/rosdok/id00004520 urn:nbn:de:gbv:28-rosdok_id00004520-9 This study addresses high fluoride levels (>1.5 mg/L) in drinking water using volcanic rock materials in column systems. Characterization techniques informed adsorption mechanisms. VPum removed110 mg/kg, VSco 22 mg/kg. Zirconium-coated adsorbents, Zr – Pu (225 mg/kg) and ZrOCSc (58 mg/kg), enhance fluoride adsorption. Models predicted upscaling without the need for more experiments. Volcanic rocks, natural or modified, can efficiently remove fluoride in fixed-bed adsorption columns. Research on competing ions and adsorbent regeneration is crucial for sustainable groundwater defluoridation.