Separation and concentration of gallium from acidic leach solutions containing various metal ions by emulsion type of liquid membranes using TOPO as mobile carrier

Selective extraction of chromium (VI) from multicomponent acidic solutions by emulsion liquid membranes using tributhylphosphate as carrier

“…The requirement is for a solvent which allows a reasonable concentration of the extractant at the interface whilst dissolving sufficient of the extracted complex. Interactions between diluent-extractant, diluent-surfactant, or any combinations may be significant and therefore it may be very difficult to draw a firm conclusion on this effect, as reported elsewhere [44,45].…”

Stability of the emulsion (W/O): Application to the extraction of a Dawson type heteropolyanion complex in aqueous solution

“…Moreover, by means of 31 PNMR and UV-vis, analysis has showed that a degradation of the structure of HPA (PZ(II)BrMo 11 O 39 ) 6− (Z(II): Mn 2+ , Co 2+ , Ni 2+ , Cu 2+ , Zn 2+ ), could take place to give peroxide species of type (PO 4 [MoO(O 2 ) 2 ] 4 ) 3− [2]. In the literature it was indicated that the HPA of Keggin [SiW 11 Mn III (H 2 O)O 39 ] 5− had a certain pronounced selectivity in the oxidation of the lignin. This robust HPA which remains stable under the conditions of bleaching with the oxygen of an eucalyptus pulp can be re-used continuously during treatments knowing that the reoxidation kinetics of the HPA by molecular oxygen is very slow [3].…”

“…Using the same emulsifier, extraction of uranium from aqueous solution, was carried out with TOPO (trioctylphosphine oxide) as extractant in presence of a paraffin composed of (60%) C 12 alkanes [10]. In addition, selective extraction of gallium from an acid solution containing other components (Fe, Co, Ni, Zn, Cd, Pb, Cu and Al), was carried out by ELM made up of the surfactant ECA4360J in kerosene, the extractant TOPO (trioctylphosphine oxide) and HCl as internal phase [11]. In biotechnology, extraction of penicillin G was optimized using an ELM made up of the emulsifying mixture Span80/ECA4360J in kerosene and Amberlite LA-2 as extractant [12,13].…”

Modeling of gadolinium recovery from nitrate medium with 8-hydroxyquinoline by emulsion liquid membrane

“…10 indicates that the plot of 1/K A against H I also gives straight lines in accordance with Eq. (7). The values of k A and k f were calculated from their intercept and slope, respectively.…”

“…Emulsion liquid membranes (ELMs) specifically are widely used in different applications [3]. It is reported that various metal ions [4][5][6][7][8][9][10][11][12][13][14][15][16] are successfully extracted by emulsion liquid membranes. Few papers [17][18][19][20][21][22][23] were presented on the extraction of lanthanides by ELM.…”