The surface tension of aqueous solutions of salts and the effect of ions on the structure of water

Yashkichev, V. I.

doi:10.1007/bf00747712

Cited by 2 publications

(3 citation statements)

References 6 publications

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“…Brine and different gases (He) were employed in several studies. The effect of the brine concentration on γ is very small because 5 wt % NaCl solution (higher than the NaCl concentration in sea water) has a γ value that is <2% higher than that of pure water [ Yashkichev , ]. The difference in γ between He and air (N 2 ) is negligible [ Massoudi and King , ].…”

Section: Methodsmentioning

confidence: 99%

Permeability of porous media: Role of the critical pore size

2017

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The knowledge of the permeability of porous media is crucial to understand fluid flow in various natural and artificial materials. Due to the complex nature of pore structure, the pore characteristic (porosity and pore radius) determining the permeability has long been under discussion. Here we determined the critical pore radius, which is the radius of the largest sphere that can freely pass through a porous medium, using the water expulsion method, an experimental technique measuring the pressure at which gas passes through a water‐saturated porous medium. We demonstrate that the critical pore radius correlates well with the permeability for a variety of porous granular media and volcanic products with an extensive range of porosities (0.71%–50%) and permeabilities (10−20–10−10 m2). We also obtained a porosity‐critical pore radius‐permeability relationship that provides a better prediction of the permeability compared with predictions obtained by previous correlations.

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Section: Methodsmentioning

confidence: 99%

Permeability of porous media: Role of the critical pore size

2017

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“…It was chosen to carry out calibration experiments in Milli-Q water with 270 mg/L of CaCl 2 instead of 250 mg/L to simulate the salt release of clay when it is highly concentrated (100 g/L). Indeed, salinity is known to have a significant effect on surface tension, especially with divalent cations like Ca 2+ …”

Section: Methodsmentioning

confidence: 99%

“…Indeed, salinity is known to have a significant effect on surface tension, especially with divalent cations like Ca 2+ . 25 The Langmuir−Szyszkowski equation was used to interpret the calibration data:…”

Section: Methodsmentioning

confidence: 99%

Clay Flotation: Effect of TTAB Cationic Surfactant on Foaming and Stability of Illite Clay Microaggregates Foams

Chapelain

Faure

Beneventi

2016

Ind. Eng. Chem. Res.

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Particulate foams are of great interest in mineral processing, water treatment, and soil remediation. One of the first conditions allowing the capture of a particle by an air bubble is surface hydrophobicity. An alkylammonium bromide surfactant (TTAB) was used to perform in situ hydrophobication of negatively charged illite clay particles. This treatment causes the neutralization of clay surface charge and the irreversible aggregation of particles. At a fixed amount of TTAB in solution, foams generated from illite clay suspensions present a better foaming ability and stability than bare TTAB solutions. The relative quantity of TTAB necessary to reach the "ideal foaming ability" corresponding to the capture of all injected gas by the foam decreased when clay concentration increased. Capture and collision probability increase may explain this phenomenon. Moreover, selectivity for the smallest clay particle size fraction (3 μm) in foams was observed and is correlated with foam height and drainage time.

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The surface tension of aqueous solutions of salts and the effect of ions on the structure of water

Cited by 2 publications

References 6 publications

Permeability of porous media: Role of the critical pore size

Permeability of porous media: Role of the critical pore size

Clay Flotation: Effect of TTAB Cationic Surfactant on Foaming and Stability of Illite Clay Microaggregates Foams

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