Groundwater defluoridation: fixed-bed column systems packed with rock materials Geleta, Wondwosen Sime , 1983- (VerfasserIn) Lennartz, Bernd , 1958- (AkademischeR BetreuerIn) Tränckner, Jens , 1968- (AkademischeR BetreuerIn) Tekeste, Esayas Alemayehu , 1973- (AkademischeR BetreuerIn) Kebede, Shimelis (AkademischeR BetreuerIn) Universität Rostock (Grad-verleihende Institution) Universität Rostock Agrar- und Umweltwissenschaftliche Fakultät (Grad-verleihende Institution) Text theses Text Hochschulschrift 2023 2023 eng ger electronic resourceremoteComputermedienOnline-Ressourceapplication/pdf1 Online-Ressource (xvii, 127 Seiten) Illustrationen, Diagramme, Karten 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.<eng> Open Access Namensnennung - Weitergabe unter gleichen Bedingungen 4.0 International vorgelegt von Wondwosen Sime Geleta Enhält Zeitschriftenartikel Articles included:: Chapter 2: Geleta, W. S.; Alemayehu, E.; Lennartz, B., 2021. Volcanic Rock Materials for Defluoridation of Water in Fixed-Bed Column Systems. Molecules 26, 977. doi:10.3390/molecules26040977; Chapter 3: Geleta, W. S.; Alemayehu, E.; Lennartz, B., 2021. Enhanced Defluoridation of Water Using Zirconium-Coated Pumice in Fixed-Bed Adsorption Columns. Materials 14, 6145. doi.org/10.3390/ma14206145; Chapter 4: Geleta, W.S.; Alemayehu, E.; Lennartz, B., 2022. Fixed-Bed Adsorption: Comparisons of Virgin and Zirconium Oxide-Coated Scoria for the Removal of Fluoride from Water. Molecules 27, 2527. doi:10.3390/molecules27082527 GutachterInnen: Bernd Lennartz (University of Rostock, Germany) ; Jens Tränckner (University of Rostock, Germany) ; Esayas Alemayehu (Jimma University, Jimma Institute of Technology, Ethiopia) ; Shimelis Kebede (Addis Ababa University, Addis Ababa Institute of Technology, Ethiopia) Dissertation Universität Rostock 2023 Kumulative Dissertation 620 660 660.2842 660 AR 22140 38.86 43.12 https://purl.uni-rostock.de/rosdok/id00004520 https://doi.org/10.18453/rosdok_id00004520 https://nbn-resolving.org/urn:nbn:de:gbv:28-rosdok_id00004520-9 https://d-nb.info/1316860795/34 Groundwater defluoridation--(DE-627)1877388831 urn:nbn:de:gbv:28-rosdok_id00004520-9 doi: 10.18453/rosdok_id00004520 oclc: 1416766005 ppn: (DE-627)1877388734