Abstract
This chapter describes the concept and potential of carrier-mediated transport, in which a specific carrier species is added to the membrane phase to selectively bind specific solutes present in the bathing solutions. The carrier provides an additional mechanism of transport through the membrane and, in so doing, generally accelerates the transport of specific permeants. Several modes are discussed—accelerated diffusion, coupled transport, and exchange transport—to illustrate how carrier-mediated transport membranes can be operated to achieve very high separations and purifications. Important factors to be considered in membrane design, such as reaction kinetics and diffusion rates, are reviewed. The creation of asymmetric transport properties by means of imposed spatial variations in membrane structure is demonstrated. The chapter concludes with an overview of a number of approaches that couple external energy sources (electrical and light) to these membranes and thereby allow modulation of transport rates.
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© 1986 D. Reidel Publishing Company
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Schultz, J.S. (1986). Carrier-Mediated Transport. In: Bungay, P.M., Lonsdale, H.K., de Pinho, M.N. (eds) Synthetic Membranes: Science, Engineering and Applications. NATO ASI Series, vol 181. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-4712-2_18
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DOI: https://doi.org/10.1007/978-94-009-4712-2_18
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