Self-association and reverse hemimicelle formation at solid–water interfaces in dilute surfactant solutions

Fuerstenau, D.W.; Čolić, Miroslav

doi:10.1016/s0927-7757(98)00795-x

Cited by 57 publications

(51 citation statements)

References 23 publications

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“…[10][11][12][13][14] Shorter molecules such as xanthates exhibiting usually 3 to 5 carbons are also used in flotation, but have been predominantly applied for the separation of electrically conductive sulfide ores [15] and are usually inefficient in the recovery of oxide particles. [16] It should also be emphasized that the flotation process relies on the phase separation (creaming) of bubbles in order to purify the mineral ore, as opposed to our approach where no creaming effect is desired.…”

Section: Stabilization Mechanismmentioning

confidence: 99%

Ultrastable Particle‐Stabilized Foams

et al. 2006

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Pump up the volume: Wet foams prepared with surfactants are thermodynamically unstable systems that undergo rapid disproportionation, drainage, and coalescence. Ultrastable foams have now been prepared using colloidal particles as stabilizers (left picture). The stabilization results from the irreversible adsorption at the air–water interface of particles surface‐modified with short‐chain amphiphiles (right picture).

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Section: Stabilization Mechanismmentioning

confidence: 99%

Ultrastable Particle‐Stabilized Foams

et al. 2006

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“…Thus, their adsorption on charged mineral surfaces could be considered as adsorption of ionic surfactants. It is well known that the shape of isotherms describing surfactant adsorption process strongly depends on its critical hemimicelle concentration and critical micelle concentration (CMC) which mark the onsets of distinct isotherm regions [31,[54][55][56][57][58]. However, phenomenon of adsorption of natural, not exactly defined surfactant adsorption on not well determined adsorbents-soilsfrom non-polar and weakly polar non-aqueous solutions is largely unexplored.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of asphaltenes from toluene on typical soils of Lublin region

Szymula

Marczewski

2002

Applied Surface Science

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Adsorption of asphaltenes on soils is one of the important problems, though largely underestimated, in environment protection of Lublin region. Asphaltene adsorption properties affect the way the contamination spreads in soil. Analysis of this phenomenon may help in localisation and elimination of oil spills. The asphaltenes studied were obtained from local drills (Ś widnik near Lublin, Poland). In our previous paper, we investigated adsorption of asphaltenes from toluene on rock components (quartz, dolomite, calcite, kaolin as well as pure iron and titanium oxides). In order to simulate the natural oil spill conditions, we used toluene as solvent and typical soils from Lublin region as adsorbents (black earth, peat soil, lessive soil, brown soil, sandy podsolised soil, pararendzina soil). Main physicochemical properties of these soils were reported. Moreover, basic adsorption properties (nitrogen adsorption, adsorption of surfactants from water solutions, acidity, etc.) of several soil fraction were studied. We decided to use only certain mineral fractions with highest adsorption capacity, as other fractions have limited impact on total adsorption. Adsorption on soil fraction gives also some insight into relative importance of various soil components on summary soil properties. The results of adsorption measurements are described in terms of physical adsorption on heterogeneous solids. # 2002 Published by Elsevier Science B.V.

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“…Fuerstenau and Colic 26) investigated the wettability of 100-nm particles of anatase and hematite using this technique. First, the oxide particles are equilibrated with the surfactant at the desired pH in water, then 5 ml of hexane is added to the aqueous dispersion, and the vials agitated for one hour.…”

Section: Liquid-liquid Extraction Of Nano-particlesmentioning

confidence: 99%

“…12 The effect of sodium dodecylsulfate on the wettability of hematite particles at pH 3 and 0.001 M sodium nitrate, expressed in terms of the percentage of hematite particles transferred into hexane from the aqueous phase. Also plotted is the electrophoretic mobility of the particles as a function of the surfactant concentration under the same conditions, showing maximum hydrophobicity when the mobility is zero (adapted from Fuerstenau and Colic [26]). …”

Section: Liquid-liquid Extraction Of Nano-particlesmentioning

confidence: 99%