Authors : Prashant B Thorat; Laxman V Gavali; Prajakta S More

Volume/Issue : Volume 9 - 2024, Issue 1 - January

Google Scholar : http://tinyurl.com/mr5389zv

Scribd : http://tinyurl.com/fznj8d5b

DOI : https://doi.org/10.5281/zenodo.10559060

Abstract : Gallium separation had always appeared indeed as an analytical challenge in traditional hydrometallurgical processes because of alike chemical and physical features with the associated impurities. Electrodeposition, Fractional precipitation, ion exchange or solid phase extraction, liquid-liquid extraction are the key separation methods studied and appealed for the recovery of gallium. Electrodeposition method used for gallium separation including problem associated with hydrogen evolution reaction and mercury cathode toxicity have been discussed. Aluminium-Gallium separation by fractional precipitation using CO2 and lime method is appreciable but it generates several tons of spoiled solution containing 3CaO. Al2O3.6H2O during conventional hydrometallurgical process. Proper choice of sorbent grafted with functional group can separate gallium from the associated metal ions by ion exchange method. Basic methods used for preparation of columns consisting sorbent with various acidic, basic and neutral extractants had been discussed. Liquid-liquid extraction practice used for recovery of Gallium from variety of aqueous media have been discussed. Optimized parameters like concentration of aqueous phase, metal ion, extractant, temperature, kinetics, composition of the extracted species studied during liquid-liquid extraction of gallium from leach liquors or synthetic mixtures is discussed.

Keywords : Gallium separation, electro deposition, fractional precipitation, ion exchange, liquid-liquid extraction