the removal of Fluoride from ...
Published by Raymond Borg, Sustainable Ideas Pty Ltd - Managing Director
the removal of Fluoride from well water may be accomplished with the use of slaked lime (Calcium Oxide). The Fluoride should precipitate as Calcium Fluoride (CaF2) and settle or be filtered out. Without knowing the concentration of Fluoride in the well water i cannot estimate the stiociomtery for the amount of CaO required and not all of the Fluoride will be removed due to the solubility constant. CaF2 is soluble to 0.17 mg/L at near neutral pH, the lower the pH the more soluble the CaF2.