Different behaviours in the solubilization of polycyclic aromatic hydrocarbons in water induced by mixed surfactant solutions

PABLO SEBASTIÁN SALES; RITA H. DE ROSSI; MARIANA ADELA FERNÁNDEZ

PERGAMON-ELSEVIER SCIENCE LTD

Año: 2011 vol. 84 p. 1700 - 1700

p class="MsoNormal" style="text-align: justify; line-height: 200%; text-indent: 35.4pt; margin: 0cm 0cm 0pt;">Water solubility of polycyclic aromatic hydrocarbons (PAHs), viz, naphthalene and phenanthrene, in micellar solutions at 25 °C was investigated, using two series of different binary mixtures of anionic and nonionic surfactants. Tween 80 and Brij-35 were used as nonionic surfactants whereas fatty acids or amphiphilic cyclodextrins (Mod-b-CD) synthesized in our laboratory were used as anionic ones. Solubilization capacity has been quantified in terms of the molar solubilization ratio and the micelle-water partition coefficient, using UV-visible spectrophotometry. Anionic surfactants exhibited less s