Organic Co-Solvent Effect on the estimation of the equilibrium aqueous concentrations of oil residuals in Patagonian soil

摘要

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(1kg~-1) and 2900(1 kg~-1) showing a general and marked increased for residues of increasing age. The determined parameters are useful for the modeling of environmental impact on polluted soils.