Mechanistic study of active transport of silver(I) using sulfur containing novel carriers across a liquid membrane

Recovery of high-purity silver directly from dilute effluents by an emulsion liquid membrane-crystallization process

“…Identifying the appropriate carrier is of paramount importance for increasing the selectivity of a LM process, but is often time-consuming and costly. Studies have focused mainly on searching for a high-selectivity carrier(s) to improve the efficiency of separating silver from other metals [8][9][10][11][12][13][14][15]. Compared with SLM, the mass transfer velocity (mol/s) is higher in an ELM process because of the larger area of the interface.…”

Extraction du plomb (II) par des membranes polymères à inclusion en utilisant l’Aliquat 336 comme transporteur

“…Ces techniques, qui connaissent de nombreuses applications (EL AAMRANI et al, 1999;GUYON et al, 1999;ILIAS et al, 1999;KUMAR et al, 2000;KUMBASAR RESINA et al, 2008;RESINA et al, 2009;SASTRE et al, 2000;TOR et al, 2009;TUTKUN, 2008), présentent l'avantage de réaliser une extraction en une seule étape et d'être particulièrement économes en eau et en réactifs. Malgré les avantages qu'elles procurent, ces membranes ne sont pas encore utilisées à l'échelle industrielle à cause de leur durée de vie très limitée due à la perte de phase organique et à la formation d'émulsions à l'interface de la membrane.…”

Highly selective transport of silver ion through a supported liquid membrane using calix[4]pyrroles as suitable ion carriers

“…All over the world, several tons of silver are lost annually in the waste from photographic and galvanizing plants [2]. Since, in addition to being a precious metal it is also a toxic, the separation and recovery of silver from industrial effluents is of paramount importance [3][4][5][6][7].…”

“…In the present work, we report a new selective and efficient supported liquid membrane system containing calix [4]pyrrole derivatives dissolved in kerosene immobilized in a thin polypropylene film as specific carriers for transport of silver ion. The strip phase contains the S 2 O 3 2− anion, which was found to play an important role in the transport process.…”