Laser interferometric investigation of solute transport through membrane-concentration boundary layer system |
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Authors: | Sławomir Wąsik Arkadiusz Bryll Marcin Drabik Kazimierz Dworecki Andrzej Ślęzak |
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Institution: | Institute of Physics, Jan Kochanowski University, Świętokrzyska 15, 25406 Kielce, Poland ;Department of Biophysics, Częstochowa University of Technology, 36B Armia Krajowa Al., 42200 Częstochowa, Poland |
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Abstract: | We investigate diffusive transport in a membrane system with a horizontally mounted membrane under concentration polarization conditions performed by a laser interferometry method. The data obtained from two different theoretical models are compared to the experimental results of the substance flux. In the first model, the membrane is considered as infinitely thin, while in the second one as a wall of finite thickness. The theoretical calculations show sufficient correspondence with the experimental results. On the basis of interferometric measurements, the relative permeability coefficient (ζs) for the system, consisting of the membrane and concentration boundary layers, was also obtained. This coefficient reflects the concentration polarization of the membrane system. The obtained results indicate that the coefficient ζs of the membrane-concentration boundary layer system decreases in time and seems to be independent of the initial concentration of the solute. |
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Keywords: | Membrane transport Solute permeability coefficient Concentration boundary layers Concentration polarization Laser interferometry |
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