title: Organic co-solvent effect on the estimation of the equilibrium aqueous concentrations of oil residuals in Patagonian soil.
abstract: Determination of the equilibrium aqueous concentration and the distribution coefficients, K, in soil samples containing oil residuals of different age, was carried out using an organic co-solvent (methanol). It was found that the solvophobic theory could be applied for the interpretation of results. The behavior of the residuals turned out to be dependent on the co-solvent fraction and the age of the oil spill. The values of K vary between 900 (l kg(-1)) and 2,900 (l kg(-1)) showing a general and marked increase for residues of increasing age. The determined parameters are useful for the modeling of environmental impact on polluted soils.
mesh_terms: D000327:Adsorption; D001118:Argentina; D006838:Hydrocarbons / Q000737:chemistry*; D007700:Kinetics; D008962:Models, Theoretical; D010578:Petroleum; D012989:Soil Pollutants / Q000032:analysis*; D012995:Solubility; D012997:Solvents / Q000737:chemistry
chemical_list: D006838:Hydrocarbons; D010578:Petroleum; D012989:Soil Pollutants; D012997:Solvents