Liquid membrane emulsion process for recovering the copper content of a mine drainage

Cr(VI) sorption behavior from aqueous solutions onto polymeric microcapsules containing a long-chain quaternary ammonium salt: Kinetics and thermodynamics analysis

“…Other available conventional extraction technologies for heavy metals are the use of ionic exchange solid resins (IX) [3], solvent extraction with liquid extractants (SX) [4,5], solid-supported liquid membranes [6], surfactant liquid membranes [7,8], and biological methods [9]. However, most of them present limitations that prevent their use in many cases.…”

Emulsion liquid membrane for heavy metal removal: An overview on emulsion stabilization and destabilization

“…Emulsion becomes swell rapidly due to an increase in the rate of water transport into the emulsion [17,40]. Valenzuela et al [57,76] also mentioned that an excessive stirring speed produced coalescence and finally breakdown emulsion globules, making the primary emulsion unstable and favoring the undesired transport of strip liquor towards the external continuous aqueous phase. The shear induced breakage of fragile emulsion droplet near tip of the impeller or impact on the wall of a contactor imposes upper limit on the stirring speed [28].…”

Experimental and Theoretical Investigation of Distribution Equilibria and Kinetics of Copper(II) Extraction with LIX 84 I and TFA

“…Here the extraction system means the choice of a chelating component, a solvent, its concentration, temperature and pH of solution. Separation of metals by solvent extraction is mainly based on the affinity of metal ions with the extractant and insolubility of the extractant in an aqueous phase (7)(8)(9)(10). Numerous studies have been reported in literature on the experimental and theoretical analyses of copper and other heavy metals with acid extractants (11)(12)(13)(14)(15).…”