M.Zharkikh's personal site logo
Mail to site
Print version
News (RSS)
Colloid science / Electrical double layer / Influence of the binding of counterions on the structure of an

Influence of the binding of counterions on the structure of an electric double layer
in a flat capillary

Zharkikh N. I., Dukhin S. S.

A system of equations describing the spatial structure of a diffuse double layer (DL) in a flat, slit-shaped pore has been supplemented by the boundary condition resulting, from the macrokinetic description of the influence of the binding of counterions on the surface charge value. Simple formulas have been derived expressing the connection of the surface charge with the surface potential for the limit cases of high and low charges, of the strong and weak overlapping of diffuse atmospheres in a pore, low and high values of the binding constant.

Neutralization of the charge of ionic groups on the pore surface by counterions depends, not only on the value of the binding constant, the charge surface density, and the electrolyte concentration, but also on the pore width.

Within a wide range of parameters, the degree of neutralization of ionic groups during binding of counterions remains invariable with an unlimited decrease in the electrolyte concentration. Therefore, the concentration dependence of the structure of a DL in the course of binding counterions may be the same as that in the permanent charge model which has come to a wide use-earlier.

Referencies

1. . ., . . . ., 1986, . 48, 5, . 891.

2. . . , 1979, . 15, 4, . 494.

3. . . , 1979, . 15, 6, . 611.

4. Martynov G. A., Salem R. R. Electrical Double-Layer at a Metal dilute Electrolyte Solution Interface. Berlin Heildelberg, N. Y.: Springer Verlag, 1983, Ch. IV, p. 112.

5. Healy T. W., Chan D., White L. R. Pure Appl. Chem., 1980, v. 52, p. 1207.

6. Stumm W., James J. Aquatic Chemistry. N. Y.: John Wiley, 1981, Ch. 10.

7. Davis J. A.. James R. O., Leckie J. O. J. Colloid Interface Sci., 1978. v. 63, 2, p. 480; Ibid., p. 489; 1980, v. 74, 1, p. 32.

8. Lyklema J. Croat. Chem. Acta, 1971, v. 43, 2, p. 249.

9. Stumm W Hohl H., Dalang E. Croat. Chem. Acta, 1976, v. 48, 4, p. 491.

10. Stumm W., Kummert R., Sigg L. Croat. Chem. Acta, 1980, v. 52, 2, p. 291.

11. Derjaguin B. V., Churaev N. V., Martynov G. A. J. Colloid Interface Sci., 1980, v. 75, 2, p. 419.

Colloid and water chemistry institite, Academy of sciences of Ukraine, Kyiv

Received 10 Dec 1985

Published : Colloid Journal (Moscow), 1986, vol. 48, 6, p. 1142 1150.

Full text in russian language.

Download free full text of the work ( 1.04 Mbytes)

Previous article | List of articles | Next article

Please this page? Help us to develop this site!

1978 2018 N.I.Zharkikh

Reprinting of articles from site are encouraged while
reference (hyperlink) to my site is provided

Site powered by

Load count : 1465

Modified : 25.08.2013

If you look up the type error
on this page, please select it
by mouse and press Ctrl+Enter.