The electrokinetic potential of glasses in aqueous electrolyte solutions

Jednačak, J; Pravdić, Velimir; Haller, Wolfgang

doi:10.1016/0021-9797(74)90293-8

Cited by 56 publications

(18 citation statements)

References 9 publications

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“…They are dou'n to pH 3, in fair agreement with the results of Jedna~ak et al (2) and Wiese el al. (1) in solutions acidified with HNO3 at a constant background of 10 -3 M KNO3.…”

Section: Discussionsupporting

confidence: 82%

Electroosmotic zeta potential measurements on single crystals

Smit

Stein

1977

Journal of Colloid and Interface Science

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A technique by which the ~ potential of rodlike materials can be measured is described. The electroosmosis of the system consisting of a rod placed in a cylindrical hole drilled in a piece of PTFE is measured. The method was tested with vitreous silica. The isoelectric point of a synthetic sapphire, grown by the Tyco EFG process, was situated at pH 3.3. The ~ potential of PTFE, required in the calculation, was measured similarly on a rod of PTFE. The method can be applied to any material in which a cylindrical hole can be drilled and from which an appropriate rod can be formed; the method can be applied also to materials from which only rodlike pieces are available.

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“…They are dou'n to pH 3, in fair agreement with the results of Jedna~ak et al (2) and Wiese el al. (1) in solutions acidified with HNO3 at a constant background of 10 -3 M KNO3.…”

Section: Discussionsupporting

confidence: 82%

Electroosmotic zeta potential measurements on single crystals

Smit

Stein

1977

Journal of Colloid and Interface Science

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“…For the glass-aqueous solution interface, the value of z varies from 250 to 2150 mV at pH 7 (dependent on ionic strength) but decreases to 0 at pH around 2.5. 35 The magnitude of the electric ®eld applied in micro reactors (typically some hundreds of V cm…”

Section: Determination Of the 3d Dimensions Of The Channel Networkmentioning

confidence: 99%

Micro reactors: principles and applications in organic synthesis

et al. 2002

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“…The use of glass beads provides us with a chemically uniform and inert solid-liquid interface. It also enables us to check our experimental method easily, because the interface between glass and water has been well studied (Jednačak et al, 1974). Glass beads of various sizes are manufactured for industrial use.…”

Section: Experiments 21 Sample Assemblymentioning

confidence: 99%

“…The relative permittivity and the viscosity of the fluid are assumed to be 80 and 1×10 −3 Pa·s. The zeta potential of high silica glass (Vycor) is −163 mV and that of bolosilicate glass (Pyrex) is −159 mV (Jednačak et al, 1974). These were measured in a 10 −4 mol/l NaCl solution.…”

Section: Streaming Potentialmentioning

confidence: 99%

Deviation of linear relation between streaming potential and pore fluid pressure difference in granular material at relatively high Reynolds numbers

Watanabe

Katagishi

2006

Earth Planet Sp

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We conducted streaming potential measurements on the packing of glass beads, and investigated the deviation of streaming potential from the Helmholtz-Smoluchowski (H-S) equation. The H-S equation was originally derived on the assumption of laminar flows. Studies using a capillary have shown that the H-S equation is valid for turbulent flows in so far as the viscous sublayer is thicker than the electrical double layer and the entrance effect is negligible. Although the streaming potential in porous media has been reported to deviate from the H-S equation for turbulent flows, its mechanism is still poorly understood. We measured the fluid flux and the streaming potential as a function of the pore fluid pressure difference. The fluid flux begins to deviate from Darcy's law at Reynolds number >3, and the streaming potential begins to deviate from the linear relation at larger Reynolds numbers. When the flow is fast, the fluid inertia separates the boundary layer from the solid surface and induces the counter flows. The fluid in the counter-flow region is separated from the circulating fluid, and ions there cannot contribute to the convection current. We think that this results in a lower streaming potential than expected from the H-S equation.

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The electrokinetic potential of glasses in aqueous electrolyte solutions

Cited by 56 publications

References 9 publications

Electroosmotic zeta potential measurements on single crystals

Electroosmotic zeta potential measurements on single crystals

Micro reactors: principles and applications in organic synthesis

Deviation of linear relation between streaming potential and pore fluid pressure difference in granular material at relatively high Reynolds numbers

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