Solubilization of selected polycyclic aromatic compounds by nonionic surfactants

Mar Mar Swe, Liya E. Yu, Kun Chih Hung, Bing Hung Chen

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


Solubilization of selected polycyclic aromatic compounds (PAC) by biodegradable nonionic surfactants, Tergitol 15-S-X (X = 7 or 9) and Neodol 25-7, was investigated and correlated with micellar properties of these surfactants. These PAC include dibenzofuran, phenanthrene, acenaphthene, fluoranthene, and 9-chloroanthracene. Tergitol surfactants are mixtures of secondary ethoxylated alcohols, and Neodol 25-7 is a mixture of similar species but has the alcohol group in the primary position. These surfactants have the same chain length of hydrophobic tails and similar numbers of ethylene oxides. The results show that the Neodol surfactant yields micelles having larger hydrophobic core volume and renders a higher solubilization capacity for the PAC solubilizates in comparison with Tergitol surfactants. In general, aggregation numbers and micellar sizes both increase at ele-vated temperatures still below the cloud point. The micellewater partition coefficients of these PAC by the nonionic surfactants were well correlated to their octanol-water partition coefficients. Moreover, an estimated log KOW value of 9-chloanthracene is 4.78. COPYRIGHT

Original languageEnglish
Pages (from-to)237-244
Number of pages8
JournalJournal of Surfactants and Detergents
Issue number3
Publication statusPublished - 2006 Sep

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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