Investigation of gallium extraction from Bayer solution using Strongly Basic Anionic Exchange Resins

In the present study, the extraction of gallium from Bayer solution containing 164.90 g/l of Na2O, 86.70 g/l of Al2O3 and 105 ppm of gallium was investigated using strongly basic anionic exchange resins such as Dowex 21k XLT, Varian AP and Amberlite IRA-410 in a continuous process under conditions of ambient temperature, 2g resin in 100ml of Bayer solution and contact time of 130 min. The amounts of gallium adsorbed on Dowex 21k, Varian AP and Amberlite IRA-410 resins were 98(93.33%), 90(85.7%) and 65(61.9%) ppm, respectively. It has been concluded that the gallium adsorption capacity and its kinetics by Dowex 21k were higher than that of two other resins. The adsorption capacity of Dowex 21k resin for gallium was obtained 30.5 mg per gram of resin which is roughly equal to that of chelating resins(31 mg gallium per gram of resin).

کلیدواژه ها:

Gallium ، Bayer solution ، Anionic exchange resins