Permeation of Chromium(VI) and Rhenium(VII) Oxyanions through Liquid Organic Membranes Facilitated by Quaternary Ammonium Chlorides

Extraction of chromium (VI) from multicomponent acidic solutions by emulsion liquid membranes using TOPO as extractant

“…After reaching a maximum value the extraction decrease with the decrease in pH. Similar results were also observed by Strzelbicki et al [15] during extraction of Cr (VI) from sulfuric acid solutions with Aliquat 336.…”

Selective extraction and concentration of chromium(VI) from acidic solutions containing various metal ions through emulsion liquid membranes using Amberlite LA-2

“…On the other hand, the decrease in the extraction with the decrease in proton concentration can be explained by the fact that the concentration of cationic species of R 3 NH + decrease due to the less availability of protons for the reaction [32]. Similar results were observed by Strzelbıcki et al [33], Bhowal and Datta [31] using aliquat 336 as extractant.…”

Emulsion Liquid Membrane Pertraction of Zinc and Copper: Analysis of Emulsion Formation using Computational Fluid Dynamics

“…Emulsion liquid membranes (ELM) on the other hand, exhibit greater potential, particularly in processing dilute feed streams for the separation and removal or recovery of metal ions [6]. ELM has proved to be an effective and inexpensive method in a variety of fields, such as the recovery of various metal ions [7][8][9][10][11], removal of acetic acid [12], removal of phenolic compounds and lactic acid [13,14], and recovery of pharmaceutical substances [15]. In this method, the diffusion of the metal ion is facilitated by the presence of an oil soluble carrier.…”