Liquid membranes a moving film apparatus for measurement of mass transfer in emulsions, and its application to active transport of phosphate ions
✍ Scribed by Gérard Trouvé; Étienne Malher; Pierre Colinart; Henri Renon
- Publisher
- Elsevier Science
- Year
- 1982
- Tongue
- English
- Weight
- 677 KB
- Volume
- 37
- Category
- Article
- ISSN
- 0009-2509
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✦ Synopsis
A new apparatus to measure mass transfer in emulsion is described. It consists in a cylindrical rod of "Teflon" surrounded by a flowing film of a water-in-oil emulsion in s column filled with an aqueous solution, It allows easy and precise measurement of the interracial area between the solution and the emulsion. In the conditions of the experiments, mass transfer resistance can be assumed to be mainly in a diffusional layer of the organic phase of the emulsion.
Data of the rate of active transport of phosphate ions through the organic phase of a water-in-oil emulsion using Aliquat 336 as carrier and montanide 80 as sudactant are obtained.
A simple diffusion model, assuming fast exchange reaction at the interfaces and control of the kinetics by the diffusion through a very thin layer of the organic phase, gives a good representation of the kinetics of transfer and explains its dependence on carrier and surfactant concentrations in good agreement with experimental results.