Separation of Metal Species by Supported Liquid Membranes

Heavy metal removal and recovery by contained liquid membrane permeator

“…However, SLMs suffer from instability resulting from loss of membrane by solubility, osmotic flow of water across the membrane, progressive wetting of the support pores, and the pressure differential across the membrane (Danesi, 1984(Danesi, , 1985Danesi et al, 1987). The other technique of emulsion liquid membrane (ELM) suffers from swelling instability of inner phase (Thien et al, 1986); further, it requires emulsification and demulsification, the latter step being especially problematic.…”

Kinetics study of selective removal of lead(II) in an aqueous solution containing lead(II), copper(II) and cadmium(II) across bulk liquid membrane

“…The transport of Pb(II) can be described by a first order kinetics in metal ion concentration changes. It is in accordance to the mathematical model proposed by Danesi [22]. The kinetic parameters for the transport of Pb(II) in the presence of Cu(II) and Cd(II) were calculated and summarized in Table 1 [8].…”

“…As shown earlier [18,22] the metal ion transfer efficiency from aqueous solution source phase into the organic phase not only depends on the cation type and properties of the ionophore but also may be influenced strongly by properties of the anion. For this reason, the influence of the concentration of perchlorate ion in the source phase on the lead ion transport was optimized.…”

Separation of Copper and Zinc Ions by Hollow Fiber Supported Liquid Membrane Containing LIX84 and PC-88A

“…The nondispersive solvent extraction has been the subject of many researchers due to its advantages as low extractant consumption, the simultaneous extraction and back-extraction in a single process, and simpler device etc. [7][8][9][10] Non-dispersive extraction is an extraction technique in which the metals are separated by the selective permeation while the dispersion between organic phase and aqueous phase is prevented using porous membrane. As means for contact between organic phase and aqueous phase, the membrane contactor, 11) the supported liquid membrane, 8,12) and the contained liquid membrane 13) were suggested.…”