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The transport study of anionic dyes through polytetrafluoroethylene hydrophobic microporous film supported liquid membrane based on tributylphosphate, as carrier, was carried out. The fundamental parameters influencing the transport of dyes have been determined, which include pH of the feed, sodium hydroxide concentration in the strip solution, tributylphosphate concentration in the membrane phase, initial dye concentration in the feed phase and rate of stirring. The mechanism actually consists of a diffusion process that occurs through the feed aqueous diffusion layer after which a fast interfacial chemical reaction occurs, followed again by diffusion through the membrane. Permeation was calculated for various carrier concentrations. Finally, an ageing test was carried out to check the stability of membrane, and the permeability was evaluated as a function of time. Under the optimum conditions, real textile dyeing effluent was tested for removal of dyes, and the results were found to be satisfactory.
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Muthuraman et al. (2006) studied this question.
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