Time evolution of near membrane layers |
| |
Authors: | K Dworecki T Kosztolowicz St Mrówczynski S Wasik |
| |
Institution: | (1) Institute of Physics, Pedagogical University, ul. Konopnickiej 15, PL 25-406 Kielce, Poland, PL;(2) Soltan Institute for Nuclear Studies, ul. Hoza 69, PL 00-681 Warsaw, Poland, PL |
| |
Abstract: | The near membrane layer is a region where the concentration of the substance transported across the membrane is significantly
decreased. Its thickness is defined as a length over which the concentration drops k times with k being an arbitrary large number. The time evolution of such a layer is studied experimentally by means of the laser interferometric
method. It is shown that within the experimental errors the thickness of the near membrane layer grows in time for any k as with the coefficient a being independent of the initial concentration and the membrane permeability. Time evolution of the near membrane layers
is also analyzed theoretically. The regularities found experimentally are naturally described within the model which has been
earlier developed by one of us. In particular, a scales as .
Received 12 November 1999 and Received in final form 3 July 2000 |
| |
Keywords: | PACS 66 10 Cb Diffusion and thermal diffusion - 82 65 Fr Film and membrane processes: ion exchange dialysis osmosis electroosmosis |
本文献已被 SpringerLink 等数据库收录! |
|