Analysis of liquid membrane extraction of binary Zn(II) and Cd(II) from chloride media with Aliquat 336 based on thermodynamic equilibrium models

Exploration of heavy metal ions transmembrane flux enhancement across a supported liquid membrane by appropriate carrier selection

“…The quaternary ammonium salts Aliquat 336, hydroxyquinoline Kelex 100 have been proven to be effective extractants for Cd(II) and -diketone LIX 54 is also a possible extraction candidate for Cd(II) (Wang et al, 2000;Mellah and Benachour, 2006;Kyuchoukov et al, 1998;Juang et al, 2004b). The quaternary ammonium salts Aliquat 336, hydroxyquinoline Kelex 100 and -diketone LIX 54 have different functional groups for complexation with Cd(II) (Wang et al, 2000;Mellah and Benachour, 2006;Kyuchoukov et al, 1998;Juang et al, 2004b), resulting different extraction mechanisms with Cd(II).…”

“…The quaternary ammonium salts Aliquat 336, hydroxyquinoline Kelex 100 and -diketone LIX 54 have different functional groups for complexation with Cd(II) (Wang et al, 2000;Mellah and Benachour, 2006;Kyuchoukov et al, 1998;Juang et al, 2004b), resulting different extraction mechanisms with Cd(II). Therefore, they have been specifically chosen as the carrier candidates for Cd(II) removal through the SLM system in this work.…”

Quaternary Ammonium and Phosphonium Ionic Liquids in Chemical and Environmental Engineering

“…Until now, predominantly Aliquat ® 336 has been evaluated as carrier for the extraction of different metal species (e.g. Au(III) (Argiropoulos et al, 1998a), Cd(II), Cu(II) (Wang et al, 2000), Co(II) (Blitz-Raith et al, 2007), Pd(II) , and Zn(II) (Juang et al, 2004) . The investigated IL exhibited high selectivity towards cadmium in the presence of naturally occurring alkali and earth alkali metals (K + , Na + , Ca 2+ , and Mg 2+ ).…”

Selective transport of Cadmium by PVC/Aliquat 336 polymer inclusion membranes (PIMs): the role of membrane composition and solution chemistry

“…Although there have been numerous dedicated investigations examining the interplay amongst these components, more research is required to elucidate the extraction mechanisms of metallic ions and small organic molecules by PIMs (Nghiem et al 2006). Liquid-liquid extraction of various base metals from solution containing high concentration of chloride using quaternary ammonium salts including Aliquat 336 has been widely studied by numerous researchers (see for examples: Juang et al 2004, Sato et al 1984, Grudpan and Taylor 1984. The extraction mechanism has been shown to involve negatively charge chloro metal complexes (Juang et al 2004).…”

“…Liquid-liquid extraction of various base metals from solution containing high concentration of chloride using quaternary ammonium salts including Aliquat 336 has been widely studied by numerous researchers (see for examples: Juang et al 2004, Sato et al 1984, Grudpan and Taylor 1984. The extraction mechanism has been shown to involve negatively charge chloro metal complexes (Juang et al 2004). The extraction mechanism of base metals such as cadmium to PVC/Aliquat PIMs is thought to be similar to that in a liquid-liquid extraction process, however to date, this premise has not been verified.…”