Fluoride removal from aqueous media by electrogenerated Al(OH)3

The removal of fluoride from aqueous media was carried out by electrocoagulation with aluminium sacrificial anode. The electrogenerated Al(OH)3 has high fluoride adsorption capacity. The applied current density was of 10, 30 and 50 A/m2, respectively, the initial fluoride concentration was of 5 mg/L and 10 mg/L, respectively and pH of 7. The supporting electrolyte was 0,01 M NaCl. Concentrations of fluoride in the electrolysed solutions of about 0,20 mg/L were obtained.