Removal of fluoride from fluoride contaminated industrial waste water by electrolysis
Joshi, V.A.; Nanoti, M.V.
Annali di Chimica 93(9-10): 753-760
2003
ISSN/ISBN: 0003-4592 PMID: 14672366 Document Number: 556695
Wastewater containing fluoride are generally treated with lime or calcium salt supplemented with aluminium salts. Wastewater generated from different industries does not always behave in the same way due to the presence of interfering contaminants. A number of techniques have been developed and studied for the removal of excessive fluoride. Most of these are based on use of aluminium salt. In alum coagulation the sorption properties of product of hydrolysis of aluminium salts and capacity of fluoride for complex formation plays a very important role. These hydrolysis products of aluminium can be produced by passing direct current through aluminium electrode. The text presented in the paper deals with the various aspect of removal of fluoride by electrolysis using aluminium electrode from fluoride chemical based industrial wastewater.