Mathematical modeling of the extraction of uranium(VI) into a polymer inclusion membrane composed of PVC and di-(2-ethylhexyl) phosphoric acid

Determination of the initial flux of polymer inclusion membranes

“…Another possible reason for this unexpected result for Runs 1-3 (Table 1) maybe due to error compensation and further examination of the reliability of this approach presented below supports this suggestion. It can be expected that the initial flux should be independent of the membrane thickness which will start affecting the flux after U(VI) has diffused well into the membrane interior [26]. The flux results (Fig.…”

“…The U(VI) extraction experiments, discussed in this study, were conducted in a 2-compartment cell where the membrane was sandwiched between the 2 compartments, each containing 100 mL of the same mechanically stirred U(VI) solution [26]. The experimental conditions of the extraction experiments are summarized in Table 1 [26]:…”

“…This article provides a comparison of various approaches for determining the initial flux in PIM-based extraction and a critical analysis of their efficacy and reliability. The experimental data used in the current study are those obtained previously by us in the extraction of U(VI) involving a PIM composed of PVC as the base polymer and di(2-ethylhexyl)phosphoric acid (D2EHPA) as the extractant/carrier [11,26].…”

Extending the Life Time of Polymer Inclusion Membrane Containing Copoly(eugenol-Dvb) as Carrier for Phenol Transport

“…The increase in stirring speed can increase turbulence in the solution. In addition, the increase in stirring speed increases physical disorders such as friction between the interfacial phases of sourcemembrane and membrane-stripping [6,18]. The percentage of ML loss is an indicator of how much the lost components of the membrane and can be used as a parameter of how durable and stable the PIM membrane from physical disorders due to the effect of stirring.…”

“…Recently facilitated transport of metal ions through polymeric inclusion membrane (PIM) carrier membranes resulted good selectivity in ion separations with real improvement of the membrane stability as compared to liquid membrane [6][7]. Polymer inclusion membranes (PIMs) are becoming of great interest for the separation of chemical species [8][9][10][11][12][13][14][15].…”