A Kinetic Investigation of a Carrier-Mediated Transport through a Bulk Liquid Membrane

Document Type : Research Article

Authors

1 Department of Chemistry, Faculty of Science, Zanjan University, P.O.Box 45195-313 Zanjan, I. R. IRAN

2 ECPM, Université Louis Pasteur, 25, Rue Bequrel, 67200 Strasbourg, FRANCE

Abstract

The kinetics of the potassium thiocyanate transport mediated by dicyclohexyl-18-crown-6 (L) through a bulk liquid membrane is studied experimentally and theoretically. The proposed model is based on the assumption of a pure diffusion of the complex salt [K·L]+SCN¯ through the liquid membrane stagnant films at the interfaces. It illustrates the connection between liquid-liquid extraction equilibrium data and transport rates. The evaluation of the transfer coefficient allows to evaluate the organic stagnant films thickness, the stationary state transport rate and the time lag.

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References

[1] Rosano, H. L., Schulman, J. H. and Weisbuch, J. B. Ann. N. Y. Acad. Sci., 92, 457 (1961).
[2] Boyadzhiev, L. and Lazarova, Z. In “Membrane Separations Technology, Principles and Applications”, Noble, R. D. and Stern, S. A. (Eds.), Elsevier Science, New York, Chapter 7 (1994).
[3] Lamb, J. D., Christiensen, J.J. and Izatt, R.M., J. Chem. Educ., 57, 227 (1980).
[4] Lamb, J. D., Christiensen, J. J., Izatt, S. R., Bedke, K., Astin, M.S. and Izatt, R.M., J. Am. Chem. Soc., 102, 3399 (1980)
[5] Izatt, R. M., Bradshaw,  J. S., Nielsen,  S. A.,  Lamb, J. D. and Christensen, J. J., Chem. Rev.,85, 271 (1985).
[6] Izatt, R. M., Haws, R. M., Lamb, J. D., Dearden, D. V., Brown, P. R., McBride, D. W. and Christensen, J.J., J. Membr. Sci., 20, 273 (1984).
[7] Arnaud-Neu, F., Fanni, S., Guerra, L., McGregor, W., Ziat, K., Schwing-Weill, M.J., Barrett, G., Mc Kervey, M. A.; Marrs, D. and Seward, E. M., J. Chem. Soc. Perkin Trans.,2, 113 (1995).
[8] Crank, J. “The Mathematics of Diffusion” Clarendon Press: Oxford, p 52 (1986).
[9] Hines, A. L. and Maddox, R. N., “Mass Transfer, Fundamentals and Applications”Prentice-Hall Publisher; New Jersey, p 29 (1985).
[10] Yaftian, M. R., Burgard, M., Matt, D., Wieser C., Dieleman, C., J. Incl. Phenom., 27, 127 (1997).
[11] Marcus, Y. and Asher, L. E., J. Phys. Chem., 82, 1246 (1978).

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