Critical solution surface tension for oil agglomeration

Measurements of the surface tension of the aqueous solution of SDDS mixture with fluorocarbon surfactants (FC) were carried out and considered in light of the surface tension of aqueous solutions of individual surfactants. Similar analyses were made for many other aqueous solutions of binary and ternary mixtures, taking into account the literature data of the surface tension of aqueous solutions of TX100, TX114, TX165, SDDS, SDS, CTAB, CPyB and FC. The possibility of predicting the surface tension of the aqueous solution of many surfactant mixtures from that of the mixture components using both the Szyszkowski, Fainerman and Miller and Joos concepts was analyzed. The surface tension of the aqueous solutions of surfactant mixtures was also considered based on the particular mixture component contribution to the water surface tension reduction. As a result, the composition of the mixed surface layer at the solution–air interface was discussed and compared to that which was determined using the Hua and Rosen concept. As follows from considerations, the surface tension of the aqueous solution of binary and ternary surfactant mixtures can be described and/or predicted.

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The effect of solution surface tension on aroma compound release from aqueous xanthan solutions

Flavour and Fragrance Journal ◽

10.1002/ffj.1695 ◽

2005 ◽

Vol 21 (1) ◽

pp. 8-12 ◽

Cited By ~ 2

Author(s):

Sébastien Secouard ◽

Catherine Malhiac ◽

Michel Grisel

Keyword(s):

Surface Tension ◽

Aroma Compound ◽

Solution Surface

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Shereshefsky's equation and binary-solution surface tension

The Journal of Physical Chemistry ◽

10.1021/j100721a045 ◽

1969 ◽

Vol 73 (1) ◽

pp. 270-273 ◽

Cited By ~ 1

Author(s):

Donald J. Cotton

Keyword(s):

Surface Tension ◽

Binary Solution ◽

Solution Surface

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Role of hydrophobicity and surface tension on shear flocculation and oil agglomeration of magnesite

Separation and Purification Technology ◽

10.1016/j.seppur.2009.12.011 ◽

2010 ◽

Vol 72 (1) ◽

pp. 7-12 ◽

Cited By ~ 23

Author(s):

Selma Duzyol ◽

Alper Ozkan

Keyword(s):

Surface Tension ◽

Oil Agglomeration

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A simplified treatment of surfactant effects on cloud drop activation

Geoscientific Model Development ◽

10.5194/gmd-4-107-2011 ◽

2011 ◽

Vol 4 (1) ◽

pp. 107-116 ◽

Cited By ~ 22

Author(s):

T. Raatikainen ◽

A. Laaksonen

Keyword(s):

Surface Tension ◽

Analytical Solutions ◽

Linear Equations ◽

Computing Time ◽

Cloud Droplets ◽

Cloud Models ◽

Non Linear ◽

Solution Surface ◽

Surfactant Effects ◽

Non Linear Equations

Abstract. Dissolved surface active species, or surfactants, have a tendency to partition to solution surface and thereby decrease solution surface tension. Activating cloud droplets have large surface-to-volume ratios, and the amount of surfactant molecules in them is limited. Therefore, unlike with macroscopic solutions, partitioning to the surface can effectively deplete the droplet interior of surfactant molecules. Surfactant partitioning equilibrium for activating cloud droplets has so far been solved numerically from a group of non-linear equations containing the Gibbs adsorption equation coupled with a surface tension model and an optional activity coefficient model. This can be a problem when surfactant effects are examined by using large-scale cloud models. Namely, computing time increases significantly due to the partitioning calculations done in the lowest levels of nested iterations. Our purpose is to reduce the group of non-linear equations to simple polynomial equations with well known analytical solutions. In order to do that, we describe surface tension lowering using the Szyskowski equation, and ignore all droplet solution non-idealities. It is assumed that there is only one surfactant exhibiting bulk-surface partitioning, but the number of non-surfactant solutes is unlimited. It is shown that the simplifications cause only minor errors to predicted bulk solution concentrations and cloud droplet activation. In addition, computing time is decreased at least by an order of magnitude when using the analytical solutions.

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