Journal of Surfactants and Detergents

, Volume 13, Issue 3, pp 305–311

Ethoxy Carboxylate Extended Surfactant: Micellar, Adsorption and Adsolubilization Properties

Authors

  • Noulkamol Arpornpong
    • National Center of Excellence for Environmental and Hazardous Waste ManagementChulalongkorn University
  • Ampira Charoensaeng
    • National Center of Excellence for Environmental and Hazardous Waste ManagementChulalongkorn University
  • David A. Sabatini
    • Schools of Civil Engineering and Environmental ScienceUniversity of Oklahoma
    • Department of Environmental EngineeringChulalongkorn University
Original Article

DOI: 10.1007/s11743-010-1179-6

Cite this article as:
Arpornpong, N., Charoensaeng, A., Sabatini, D.A. et al. J Surfact Deterg (2010) 13: 305. doi:10.1007/s11743-010-1179-6

Abstract

The micellar, adsorption, and adsolubilization properties of a novel ethoxy carboxylate extended surfactant are measured and compared to an extended sulfate surfactant. The critical micelle concentration (CMC) of the ethoxy carboxylate extended surfactant is measured to be 0.02 mM while it is 0.07 mM for the extended sulfate surfactant. Adsorption and adsolubilization studies are carried out on alumina oxide surfaces. The extended sulfate surfactant has a higher maximum adsorption capacity onto the aluminum than the ethoxy carboxylate extended surfactant (0.47 vs. 0.14 mmol/g, respectively). For adsolubilization, the extended sulfate surfactant shows a slightly higher phenanthrene adsolubilization compared to the ethoxy carboxylate extended surfactant (log Kadm of 6.15 vs. 5.71, respectively). In contrast, for solubilization, the ethoxy carboxylate extended surfactant exhibits higher phenanthrene solubilization capacities than the extended sulfate surfactant (log Kmic of 5.61 vs. 5.42, respectively). Relative to surfactant loss from the solid surface, the ethoxy carboxylate extended surfactant shows a higher desorption capacity as compared to the extended sulfate surfactant. From these measurements, the ethoxy carboxylate extended surfactant has better properties for micellar applications (lower CMC, higher Kmic), while the extended sulfate surfactant has better properties for admicellar applications (higher qmax and Kadm values, and less desorption).

Keywords

Ethoxy carboxylate extended surfactantAdmicelleAdsolubilizationAdsorptionDesorptionSolubilization

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© AOCS 2010