Abstract
Acoustophoresis consists of applying an ultrasonic wave to a charged solution and measuring the induced electric field, originating from the local separation of charges. This effect, predicted by Debye in 1933, has been studied for electrolytes (Ionic Vibration Potential, IVP) and for colloids (Colloidal Vibration Potential, CVP).
In the first part of this work, we analyze the effect of interionic forces on IVP within the Mean Spherical Approximation, at the same level of description as for conductance of electrolytes. This analysis is required by the fairly high concentrations used in IVP experiments. Experimental data found in the literature are used to find the “acoustophoretic mass” of cations, which involves solvation water. The values obtained for alkali and alkali-earth cations are in good agreement with other cation solvation numbers.
In the second part, a method for the calculation of equilibrium sedimentation profiles of charged colloids, in the presence of added salt, is presented. It is found that the concentration of the colloidal particles obeys a non-linear equation, which can be solved by a numerical method. The main assumptions used are that the electrical neutrality condition is verified locally and that the colloids interact through a hard-sphere potential. The results are compared with recent experimental data. It is found that the agreement is excellent in the case of high screening (excess of salt), but becomes poorer when the salt concentration is decreased. The salt-free case is also approached.
We finally present our projects that describe acoustophoresis applied to colloidal suspensions where the two previous studies are used.
Preview
Unable to display preview. Download preview PDF.
References
Debye P (1933) J Chem Phys 1:13
Zana R, Yeager E (1982) Mod Aspects Electrochem 14:1
Millner R (1961) Z Elektrochem 65:639; Millner R, Müller H-D (1966) Ann Phys (Leipzig) 17:160
Marlow BJ, Fairhurst D, Pendse HP (1988) Langmuir 4:611
Bugosh J, Yeger E, aHovorka F (1947) J Chem Phys 15:592–597
Bernard O, Kunz W, Turq P, Blum L (1992) J Phys Chem 96:3833
Bernard O, Kunz W, Turq P, Blum L (1992) J Phys Chem 96:398
Hinton JF, Amis ES (1971) Chemical Reviews 71 num 6:627
Stokes RH, Robinson RA (1948) J Amer Chem Soc 70:1870
Principles of electrochemistry, edited by MacInnes DA (Reinhold, New York, NY, 1939, Chapter 4).
Salmon PS, Lond PB (1992) PHysica B 182:421–430
Okubo TJ (1994) Phys Chem 98:1472–1474
Piazza R, Bellini T, Degiorgio V (1993) Phys Rev Lett 71:4267–70
Biben T, Hansen JP, Barrat JL (1993) J Chem Phys 98:7330–44
Biben T, Hansen JPJ Phys Condens Matter 6:A345–A349
Carnahan NF, Starling KE (1969) J Chem Phys 51:635
Robinson RA, Stokes RH (1959) Electrolyte Solutions 2nd ed.; Butterworths; London
Turq P, Orcil L, Chemla M, Mills RJ (1982) Phys Chem 86:4062. Simonin JP, Turq P, Soualhia E, Michard G, Gaillard JF (1989) Chem Geol 78:343
Mills R, Perera A, Simonin JP, Orcil L, Turq P (1985) J Phys Chem 89:2722–25
Simonin JP, Gaillard JF, Turq P, Soualhia E (1988) J Phys Chem 92:1696–1700
Author information
Authors and Affiliations
Editor information
Rights and permissions
Copyright information
© 1995 Dr. Dietrich Steinkopff Verlag GmbH & Co. KG
About this paper
Cite this paper
Vidal, S.D., Simonin, J.P., Turq, P., Bernard, O. (1995). Acoustophoresis of electrolyte solutions and sedimentation profiles of screened charged colloids. In: Appell, J., Porte, G. (eds) Trends in Colloid and Interface Science IX. Progress in Colloid & Polymer Science, vol 98. Steinkopff. https://doi.org/10.1007/BFb0115234
Download citation
DOI: https://doi.org/10.1007/BFb0115234
Published:
Publisher Name: Steinkopff
Print ISBN: 978-3-7985-1031-9
Online ISBN: 978-3-7985-1667-0
eBook Packages: Springer Book Archive