Solubilization of polycyclic aromatic hydrocarbons in micellar nonionic surfactant solutions
- Carnegie Mellon Univ., Pittsburgh, PA (USA)
Experimental data are presented on the enhanced apparent solubilities of naphthalene, phenanthrene, and pyrene resulting from solubilization in aqueous solutions of four commercial, nonionic surfactants: an alkyl polyoxyethylene (POE) type, two octylphenol POE types, and a nonylphenol POE type. Apparent solubilities of the polycyclic aromatic hydrocarbon (PAH) compounds in surfactant solutions were determined by radiolabeled techniques. Solubilization of each PAH compound commenced at the surfactant critical micelle concentration and was proportional to the concentration of surfactant in micelle form. The partitioning of organic compounds between surfactant micelles and aqueous solution is characterized by a mole fraction micelle-phase/aqueous-phase partition coefficient, K{sub m}. Values of log K{sub m} for PAH compounds in surfactant solutions of this study range from 4.57 to 6.53. Log K{sub m} appears to be a linear function of log K{sub ow} for a given surfactant solution. A knowledge of partitioning in aqueous surfactant systems is a prerequisite to understanding mechanisms affecting the behavior of hydrophobic organic compounds in soil-water systems in which surfactants play a role in contaminant remediation or facilitated transport.
- OSTI ID:
- 6103358
- Journal Information:
- Environmental Science and Technology; (USA), Vol. 25:1; ISSN 0013-936X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
NAPHTHALENE
SOLUBILITY
PHENANTHRENE
PYRENE
AQUEOUS SOLUTIONS
EXPERIMENTAL DATA
MEASURING METHODS
MICELLAR SYSTEMS
SURFACTANTS
AROMATICS
CONDENSED AROMATICS
DATA
DISPERSIONS
HYDROCARBONS
INFORMATION
MIXTURES
NUMERICAL DATA
ORGANIC COMPOUNDS
SOLUTIONS
540220* - Environment
Terrestrial- Chemicals Monitoring & Transport- (1990-)
540320 - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)