Zirconium-based adsorbent and hydroxy-lapatite for the removal of fluoride from drinking water, Jagalur, Davangere, Karnataka, India

Abstract: Drinking fluoridated water is a big health concern in various nations. The current study focuses on fluoride removal by a) zirconium-impregnated hybrid anion exchange (HAIX-Zr) resin, b) synthetic hydroxyapatite (HAP), and c) co-precipitation with calcium and phosphate. Fluoride absorption by HAIX-Zr resin was fairly quick, with 60% elimination achieved in 30 minutes. Fluoride absorption by HAIX-Zr resin followed the pseudo-second order kinetic model, and adsorption data best suited the Freundlich isotherm. Fluoride removal ability of the resin reduced as pH and bicarbonate concentration increased. Continuous flow packed-bed studies with genuine groundwater were also carried out.

Keywords: Groundwater, fluoride removal using Zirconium Synthetic hydroxy lapatite calcium and phosphate