Liquid membrane processes for gallium recovery from alkaline solutions

Recovery of Ga(III) by Raw and Alkali Treated Citrus limetta Peels

“…The process feasibility was checked by adsorbing the Ga(III) ions from the simulated spent Bayer liquor on RCP and ACP. It was prepared in laboratory by adding the components which are generally present in spent Bayer liquor in their stoichiometric amount [ 30 ]. Thus, 25 g of Na 2 CO 3 were dissolved in hot water and cooled to room temperature.…”

Metal Ion Separations by Supported Liquid Membranes

“…In these models the dimerization constant is incorporated as a new equation to be satisfied in the resolution of the coupled equations during the numerical treatment. Polymerization of Eu-(III)-D2EHPA complexes has been observed in SLMs when the transport rate diminished due to the use of a thick support material or the presence of acetate anions at high Eu(III) concentration (Hung and Lee, 1990) Kiani et al (1984), Prasad et al (1986), Prasad and Sirkar (1987a,b), Zha et al (1995c) 1-8…”

“…Overall mass transfer coefficients and individual coefficient relations for these three different membrane types and for the flat and hollow fiber forms are proposed. More recently, Zha et al (1995c) phobic and hydrophilic membranes in the recovery of gallium from alkaline solutions. From mass transfer resistance relations, it can be deduced that in the most common situation, when m f > 1 and m s , 1 (where m f and m s are the solute distribution coefficient in feed and strip solution, respectively), the use of hydrophobic membranes as the support in membrane extraction processes gives rise to lower mass transfer resistance.…”