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Combined effect of natural organic matter and surfactants on the apparent solubility of polycyclic aromatic hydrocarbons

Title
Combined effect of natural organic matter and surfactants on the apparent solubility of polycyclic aromatic hydrocarbons
Authors
Cho H.-H.Choi J.Goltz M.N.Park J.-W.
Ewha Authors
박재우
Issue Date
2002
Journal Title
Journal of Environmental Quality
ISSN
0047-2425JCR Link
Citation
vol. 31, no. 1, pp. 275 - 280
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Both natural organic matter (NOM) and surfactants are known to enhance the apparent aqueous solubility of hydrophobic organic contaminants (HOCs) in aqueous systems. In this study, the combined effect of NOM and surfactants on enhancing the solubility of HOCs was investigated, since both may occur and affect the fate and transport of HOCs in natural aqueous environments. Experimental results indicated that the apparent solubility of naphthalene, phenanthrene, and pyrene in NOM and anionic surfactant solution was lower than their solubility in NOM solution alone. However, the apparent solubility of an HOC in NOM and nonionic surfactant solution is almost the same as the sum of the HOC's solubility in NOM solution plus its solubility in nonionic surfactant solution. The observation that apparent aqueous solubility of HOCs in NOM and anionic surfactant solution is decreased is probably due to the fact that the cations that are released when the anionic surfactant dissociates may form ion pairs with acidic or phenolic groups associated with the NOM. This serves to increase the size of hydration of these groups, thereby decreasing the effective size of the nonpolar moieties associated with the NOM, and thus decreasing hydrophobic partitioning of the HOCs into the NOM. The results presented here will help us to understand the effect of NOM and surfactants on the fate and transport of HOCs in aquatic systems.
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엘텍공과대학 > 환경공학전공 > Journal papers
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