Phenanthrene aqueous solution data

Experimental results from screening tests to assess phase transfer witl C8PE95 and phenanthrene partitioning from aqueous surfactant solutioi to hexane support this conclusion. In such tests >90% of the micella 14C-phenanthrene transferred to a hexane phase in less than 1 day fron aqueous solution having surfactant concentration of 500 X CMC. In sue systems there is also the transfer of a fraction of the surfactant to the hexam phase. However, data of Harusawa et al. (60) suggested that for a test witl 500 X CMC only 5% of the surfactant would be transferred to the hexam phase. 

Figure 1.33 show the change in the solubility of naphthalene (a water-insoluble organic molecule) in SDS aqueous solutions. Similar data have been reported for many other water-insoluble organic compounds (such as anthracene, phenanthrene, azobenzene, etc.). 

Aquan-Yuen, M., Mackay, D., Shiu, W.Y. (1979) Solubility of hexane, phenanthrene, chlorobenzene, and p-dichlorobenzene in aqueous electrolyte solutions. J. Chem. Eng. Data 24, 30-34. 

Phenanthrene Solubilization. A model characterizing the distribution of HOC in systems of soil and micellar nonionic surfactant solution was described previously (7). In this model HOC is assumed to partition among three distinct compartments the soil, the micellar pseudophase, and the aqueous pseudophase. The solubilization model accounts for the partitioning of HOC between the micellar pseudophase and the aqueous pseudophase, the increase in apparent HOC solubility associated with nonionic surfactant monomers in the aqueous pseudophase, the sorption of surfactant onto soil, and the increase in fractional organic carbon content of a soil as a result of surfactant sorption. Evaluation of the model with experimental data was described by Edwards et al. (12). 

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