TY - JOUR
T1 - Solubilization of selected polycyclic aromatic compounds by nonionic surfactants
AU - Swe, Mar Mar
AU - Yu, Liya E.
AU - Hung, Kun Chih
AU - Chen, Bing Hung
N1 - Funding Information:
The authors would like to thank the National University of Singapore and the National Science Council of Taiwan for their financial support.
PY - 2006/9
Y1 - 2006/9
N2 - 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
AB - 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
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U2 - 10.1007/s11743-006-5003-2
DO - 10.1007/s11743-006-5003-2
M3 - Article
AN - SCOPUS:33749485293
SN - 1097-3958
VL - 9
SP - 237
EP - 244
JO - Journal of Surfactants and Detergents
JF - Journal of Surfactants and Detergents
IS - 3
ER -