Streaming Potential and Electroosmosis Measurements to Characterize Porous Materials

Luong, D.T.; Sprik, R.

doi:10.1155/2013/496352

Cited by 27 publications

(21 citation statements)

References 23 publications

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“…Porosity and permeability are measured in the similar way as described in Luong and Sprik (). The solid density

ρ_{s}

is determined from

ρ_{s} = \frac{m_{d r y}}{(1 - φ) A L},

where

m_{d r y}

is the weight of the dry sample before saturation, and A and L are the cross‐sectional area and the physical length of the porous sample, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…They defined the formation factor F as:

F = \frac{α_{\infty}}{φ} = \frac{σ_{f}}{σ_{r}},

where

α_{\infty}

is the tortuosity,

σ_{r}

is the electrical conductivity of the saturated sample,

σ_{f}

is the electrical conductivity of the fluid, and ϕ is the porosity of the sample. The experimental setup and the way to measure the tortuosity are similar as described in Luong and Sprik () for unconsolidated samples. A cylindrical porous sample is jacketed in a tight (nonconducting) silicon sleeve.…”

Section: Methodsmentioning

confidence: 99%

“…Porosity and permeability are measured in the similar way as described in Luong and Sprik (2013). The solid density ρ s is determined from…”

Section: Porosity Solid Density Permeability and Formation Factor mentioning

confidence: 99%

“…The way used to collect the SPC is similar to that described in Jouniaux and Pozzi (1995b); Lorne et al (1999); Luong and Sprik (2013), for example, where Ag/AgCl electrodes are used to avoid polarization. In our measurements, Ag/AgCl wire electrodes are bought from a manufacturer of A-M systems.…”

Section: Streaming Potentialmentioning

confidence: 99%

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Permeability dependence of streaming potential coefficient in porous media

Thanh

Sprik

2015

Geophysical Prospecting

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A B S T R A C TIn theory, the streaming potential coefficient depends not only on the zeta potential but also on the permeability of the rocks that partially determines the surface conductivity of the rocks. However, in practice, it is hard to show the permeability dependence of streaming potential coefficients because of the variation of zeta potential from sample to sample. To study permeability dependence of streaming potential, including the effects of the variation of the zeta potential and surface conductance due to the difference in mineral compositions between samples, we perform measurements on 12 consolidated samples, including natural and artificial samples saturated with 7 different NaCl solutions to determine the streaming potential coefficients. The results have shown that the streaming potential coefficients strongly depend on the permeability of the samples for low fluid conductivity. When the fluid conductivity is larger than than 0.50 S/m for the natural samples or 0.25 S/m for the artificial ceramic samples, the streaming potential coefficient is independent of permeability. This behavior is quantitatively explained by a theoretical model.

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“…Porosity and permeability are measured in the similar way as described in Luong and Sprik (). The solid density

ρ_{s}

is determined from

ρ_{s} = \frac{m_{d r y}}{(1 - φ) A L},

where

m_{d r y}

is the weight of the dry sample before saturation, and A and L are the cross‐sectional area and the physical length of the porous sample, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…They defined the formation factor F as:

F = \frac{α_{\infty}}{φ} = \frac{σ_{f}}{σ_{r}},

where

α_{\infty}

is the tortuosity,

σ_{r}

is the electrical conductivity of the saturated sample,

σ_{f}

Section: Methodsmentioning

confidence: 99%

“…Porosity and permeability are measured in the similar way as described in Luong and Sprik (2013). The solid density ρ s is determined from…”

Section: Porosity Solid Density Permeability and Formation Factor mentioning

confidence: 99%

Section: Streaming Potentialmentioning

confidence: 99%

See 2 more Smart Citations

Permeability dependence of streaming potential coefficient in porous media

Thanh

Sprik

2015

Geophysical Prospecting

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show abstract

“…). If not fed to an external circuit, streaming current is counterbalanced by the conduction current .…”

Section: Electrokinetic Phenomena: Electroosmosis Streaming Currentmentioning

confidence: 99%

Fluid manipulation on the micro‐scale: Basics of fluid behavior in microfluidics

Novotný

Foret

2016

J of Separation Science

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Fluid manipulation on the micro-scale (microfluidics) is bringing new potential applications in a number of fields, including chemistry, biology and medicine. At sub-millimeter channel scale, some phenomena, unimportant at the macroscale, become an important force to consider when designing a microfluidics system. For example, the decrease in fluid mass causes the effects of viscosity to overcome the influence of inertia. Turbulent flow cannot be achieved at any realistic fluid velocity, making mixing a challenging task. The only phenomenon capable of blending liquids at microscale is diffusion and liquid streams can be flowed side-by-side for tens of minutes before they completely fuse together. The decrease in the channel size also leads to an increased surface-to-volume ratio, which increases the importance of surface effects, including adsorption, capillary action and surface wetting and/or electric double layer formation with related electrokinetic phenomena. While rivers cannot flow uphill, a stream of liquid can easily flow up against gravity inside a capillary. Similarly, the formation of electric double layer near the charged surface of a micro-channel or capillary can be applied for electrokinetic actuating. This review summarizes selected physical phenomena related to liquid-based (water solutions) microfluidics as described recently.

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Temperature dependence of the zeta potential in intact natural carbonates

Mahrouqi

Vinogradov

Jackson

2016

Geophysical Research Letters

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The zeta potential is a measure of the electrical charge on mineral surfaces and is an important control on subsurface geophysical monitoring, adsorption of polar species in aquifers, and rock wettability. We report the first measurements of zeta potential in intact, water‐saturated, natural carbonate samples at temperatures up to 120°C. The zeta potential is negative and decreases in magnitude with increasing temperature at low ionic strength (0.01 M NaCl, comparable to potable water) but is independent of temperature at high ionic strength (0.5 M NaCl, comparable to seawater). The equilibrium calcium concentration resulting from carbonate dissolution also increases with increasing temperature at low ionic strength but is independent of temperature at high ionic strength. The temperature dependence of the zeta potential is correlated with the temperature dependence of the equilibrium calcium concentration and shows a Nernstian linear relationship. Our findings are applicable to many subsurface carbonate rocks at elevated temperature.

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Streaming Potential and Electroosmosis Measurements to Characterize Porous Materials

Cited by 27 publications

References 23 publications

Permeability dependence of streaming potential coefficient in porous media

Permeability dependence of streaming potential coefficient in porous media

Fluid manipulation on the micro‐scale: Basics of fluid behavior in microfluidics

Temperature dependence of the zeta potential in intact natural carbonates

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