Abstract
The solubility in water and the partition coefficients, K, in soils samples of residues of petroleum of different ages were determined using an organic cosolvent (methanol), and the solvophobic theory was applied for the interpretation of results. The behavior of the residuals turned out to be dependent of the cosolvent fraction. The values of K’s vary among 900 (Lkg-1) and 2,900 (Lkg-1) showing a general and marked increase for residues of increasing age. The determined parameters are useful for the modeling of environmental impact in polluted soils.
Highlights
In the field of Environmental Chemistry is of interest to know the behavior of the pollutants in water since the transport and most of the degradation processes take place in water phase
The oil residuals are hydrophobic but their solubility can be increased by means of the use of an organic cosolvent, as the alcohols
This study intent to investigate on one hand, if the variations observed in the solubility and K of the oil residuals, in the presence of different cosolvent fractions can be interpreted by the solvophobic theory and if, based on it, the solubility in water and the K’s in complex mixtures can be estimated
Summary
In the field of Environmental Chemistry is of interest to know the behavior of the pollutants in water since the transport and most of the degradation processes take place in water phase. The studied system is complex; the solubility of each component should necessarily be affected by the presence of the other ones.
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