Transport of chromium (VI) through a Cyanex 923–xylene flat-sheet supported liquid membrane

Processing of steel rinse waters through coextraction and selective stripping

“…Previous experiments had shown that neither chromium(III) (Alguacil et al, 2000) nor nickel(II) are extracted by Cyanex-923; thus, synthetic solutions containing only Fe 3ϩ , HNO 3 , and HF in different concentrations were prepared.…”

The extraction of lactic acid by emulsion type of liquid membranes using alamine 336 in escaid 100

“…This could be attributable to a permeation process controlled by the diffusion in the stagnant film of the aqueous feed phase, as argued by Alguacil et al (2000); and Schöller et al (1993).…”

Transport of chromium(VI) through a Cyanex 921‐supported liquid membrane from HCl solutions

“…assuming a value of D aq = 10 −5 cm s −1 , 19 and P lim equal to 8.7 × 10 −3 cm s −1 , the value of d aq is 1.1 × 10 −3 cm, this value being the minimum thickness of the stagnant aqueous diffusion layer within the present experimental conditions. Using the equation…”