Specifics Of The Temperature Dependence Of The Diffusion Coefficient For A Cocl2 Aqueous Solution In Porous-Glass Membranes

Authors

V. N. Pak, St. Petersburg Pedagogical InstituteFollow
A. B. Nepomnyashchii, St. Petersburg Pedagogical Institute
T. M. Burkat, St. Petersburg Pedagogical Institute
Sh R. Coon, University of Northern IowaFollow

Document Type

Article

Journal/Book/Conference Title

Russian Journal of Physical Chemistry A

Volume

79

Issue

9

First Page

1411

Last Page

1414

Abstract

The diffusion transport of a 0.1 M CoCl2 aqueous solution in a number of porous-glass membranes with a prevailing pore radius of rp = 4.5-70 nm was studied over a temperature range of 25-70°C. In all cases, the diffusion coefficients were found to obey the D = D0exp(K s/rp) functional dependence, where D0 is the diffusion coefficient for the bulk solution and Ks is the characteristic-dimension parameter reflecting the degree of structurizing of the liquid layer near a silica surface. At 70°C, Ks is vanishing small, leading to D - D0, in agreement with the concept that temperature rise suppresses the effect of structurization of water near a silica surface. Copyright © 2005 by Pleiades Publishing, Inc.

Department

Department of Chemistry

Original Publication Date

9-1-2005

Recommended Citation

Pak, V. N.; Nepomnyashchii, A. B.; Burkat, T. M.; and Coon, Sh R., "Specifics Of The Temperature Dependence Of The Diffusion Coefficient For A Cocl2 Aqueous Solution In Porous-Glass Membranes" (2005). Faculty Publications. 2918.
https://scholarworks.uni.edu/facpub/2918