Fluoride Removal by Calcite: Evidence for Fluorite ...
Fluoride contamination of groundwater, both anthropogenic and natural, is a major problem worldwide. In this study, fluoride removal by crushed limestone (99% pure calcite) was investigated by batch studies and surfacesensitive techniques from solutions with fluoride concentra tions from 150 μmol/L (3 mg/L) to 110 mM (∼2100 mg/L).