“…Currently, the main technologies that remove fluorides, include reverse osmosis, 8,9 nanofiltration, 10–12 precipitation-coagulation, 13,14 electrocoagulation, 15–17 adsorption 5,18,19 and ion-exchange. 20,21 The first three methods are rarely used for fluoride removal because of unmet discharge requirements, membrane pollution, and cumbersome treatment.…”