Water Washing of Polycylic Aromatic Hydrocarbons from Soils.
Abstract:
Dissolution studies were carried out using batch operations with soils that were prepared in the laboratory. The soil used was Jordan sand fraction organic carbon foc 0.0001. The sand was coated with varying concentrations of phenanthrene and pyrene, both of which are polycyclic aromatic hydrocarbons PAHs. Hexane was used to dissolve the chemical and then coat the sand. Double distilled water with a pH of about 5 was used to wash the various coated sands over a series of days. They were given four days to equilibrate before the water was analyzed and replaced with new water. It was found that lower solubilities were obtained for phenanthrene at lower soil concentrations. Strong linear correlations were observed over short ranges of about 0.1 mgg or less. However there was evidence that a nonlinear function would be necessary to describe this relationship over a broad range of soil concentrations about 0 to 0.4 mgg due to decreasing slopes with increasing soil concentrations.