Colloidal flocculation of micellar solutions of anionic surfactants
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Micellar solutions of anionic surfactants usually precipitate in the presence of cations, following a mechanism by which initially cations bind themselves to the micellar surface until saturation is achieved. At higher cation concentrations, unbound cations precipitate with surfactant monomers. In a few cases cations, and especially Al3+, cause surfactant micelles to flocculate. These flocs have properties as adsorbents of acidic organic compounds, which might be used in water treatment processes. Both α-olefinsulfonates C14−C16, and laurylsulfate micellar solutions are fast flocculation colloidal systems in the presence of Al3+.
Key WordsAluminum AOS flocculation laurylsulfate light scattering micellar z-potential
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- 1.Talens, F.I., Measurement of the z-Potential on Anionic Surfactant Micelles, in Proceedings of the XXVII Jorn. Com. Esp. Deterg., Barcelona, 1997, pp. 501–508.Google Scholar
- 6.Porras, M., and F.I. Talens, Estimation of the Adsorption Capacity of Al3+/Anionic Surfactant Flocculates, in Proceedings of the 4th World CESIO Conference, Barcelona 1996, pp. 133–138.Google Scholar
- 7.Brant, L.L., K.L. Stellner, and J.F. Scamehorn, Recovery of Surfactant from Surfactant-Based Separations Using a Precipitation Process, in Surfactant Based Sevaration Processes, edited by J.F. Scamehorn and J.H. Harwell, Marcel Dekker, New York, 1989, pp. 323 ff.Google Scholar
- 8.Porter, M.R., Handbook of Surfactants, 2nd edn., Chapman & Hall, Bury St. Edmunds, 1994, p. 42.Google Scholar
- 9.Porras, M., and F.I. Talens, Time Invariance in the Adsorbing Capacity in Anionic Surfactant Flocculates, in Proceedings of the IXth European Colloid and Interface Society Conference, Barcelona, 1995, PII-43.Google Scholar
- 11.Talens, F.I., P. Patón, and S. Gaya, Influence of pH in the Flocculation of Sodium Laurylsulphate in the Presence of Al(III) in Aqueous Solutions, in Proceeding of the XXVIth Jorn. Com. Esp. Deteg., Barcelona, 1995, pp. 259–266.Google Scholar
- 12.Patón, P., Aplicación de los Sistemas Tensioactivo Aniónico/Aluminio(iii) a la Depuración de Aguas Residuales: Fundamento Fisicoauímico, Ph.D. Thesis, University of Barcelona, 1998.Google Scholar
- 13.Rodriguez, C.H., and J.F. Scamehorn, Kinetics of Surfactant Precipitation, in Proceedings of the 4th World Surfactant Conference, Barcelona, 1996, pp. 188–200.Google Scholar