Effects of solution and soil chemistry on the distribution of oil residual in patagonian soil
The distribution coefficient of oil residuals between water and the soil under equilibrium conditions is, in the case of Patagonian soils, strongly dependent on the clay contents and humidity of the soil. Other variables such as, the soil salinity and the environmental exposure conditions, also affe...
Guardado en:
| Autor principal: | |
|---|---|
| Otros Autores: | , |
| Formato: | Capítulo de libro |
| Lenguaje: | Inglés |
| Publicado: |
2004
|
| Acceso en línea: | Registro en Scopus Handle Registro en la Biblioteca Digital |
| Aporte de: | Registro referencial: Solicitar el recurso aquí |
| Sumario: | The distribution coefficient of oil residuals between water and the soil under equilibrium conditions is, in the case of Patagonian soils, strongly dependent on the clay contents and humidity of the soil. Other variables such as, the soil salinity and the environmental exposure conditions, also affect the interactions between the phases. The oil residuals are generally accompanied by water spills, that are extracted together with the oil and which, frequently, have high salinity. These salts stay on soils during long times and finally they became part of the soil. The resulting oil aqueous concentrations and the soil-water distribution ratio (IQ) may be strongly influenced by these factors. Based on experimental data of several parameters determined in different regional field samplings, a semi-empiric model was developed that allows prediction of the Kd dependence with the exposure time, the salinity of the equilibrium aqueous concentration and the clay contents of the soil. The Monte Carlo simulation was used in this work. Distribution values of soil conductivity, clays content, and assumed fixed values of the age of the oil spill were used in the model. A set of calculated values of Kd was obtained and the results show a distribution that was probabilistically analyzed. The Kd values increase with increasing age of spill and soil salinity and decrease when the salinity of the initial aqueous concentration is greater than the soil salinity. The determined parameters are useful for modeling of the environmental impact on polluted soils and for the design of remediation techniques. |
|---|---|
| Bibliografía: | Carmo, A.M., Hundal, L.S., Thompson, M.L., Sorption of hydrophobic organic compounds by soil materials: Application of unit equivalent freundlich coefficients (2000) Environ. Sci. Technol., 34, pp. 4363-4369 De Jonge, H., Freijer, J.I., Verstraten, J.M., Westerveld, J., Relation between bio availability and fuel oil hydrocarbon composition in contaminated soils (1997) Environ. Sci. Technol., 31, pp. 771-775 Dragun, J., (1998) The Soil Chemistry of Hazardous Materials, , Amherst Scientific Publishers, 2da Edition, Massachusetts Karimi-Lotfabad, S., Pickard, M.A., Gray, M.R., Reactions of polynuclear aromatic hydrocarbons on soil (1996) Environ. Sci. Technol., 30, pp. 1145-1151 Lane, W.F., Loehr, R.C., Estimating the equilibrium aqueous concentrations of polynuclear aromatic hydrocarbons in complex mixtures (1992) Environ. Sci. Technol., 26, pp. 983-990 Luthy, R.G., Aiken, G.R., Brusseau, M.L., Cunningham, S.D., Gschwend, P.M., Pignatello, J.J., Reinhard, M., Westall, J.C., Sequestration of hydrophobic organic contaminants by geosorbents (1998) Environ, Sci. Technol., 31, pp. 3341-3347 Manan, S.E., (1996) Environmental Chemistry, Lewis Publishers, 6th Edition, , Michigan Nudelman, N., Ríos, S.M., Katusich, O., Interactions between crude oil and patagonian soil as a function of the clay-water contents (2000) Environ. Technol., 21, pp. 437-446 Nudelman, N., Ríos, S.M., Katusich, O., Organic cosolvent effect on the estimation of the equilibrium aqueous concentrations of oil residuals in patagonian soil (2002) Environ. Technol., 23, pp. 961-969 Pignatello, J.J., Xing, B., Mechanisms of slow sorption of organic chemicals to natural particles (1996) Environ. Sci. Technol., 30, pp. 1-10 Rhykerd, R.L., Weaver, R.W., McInnes, K.J., Influence of salinity on bioremediation of oil in soil (1995) Environmental Pollution, 90, pp. 127-130 Schwarzenbach, R.P., Gschwend, P.M., Imboden, D.M., (1995) Environmental Organic Chemistry, , Wiley, NY Xia, G., Pignatello, J.J., Detailed sorption isotherms of polar and apolar compounds in a high-organic soil (2001) Environ. Sci. Technol., 35, pp. 84-94 Yong, R.N., Mohamed, A.M.O., Warkentin, B.P., (1992) Principles of Contaminant Transport in Soils, , Elsevier, Amsterdam |
| ISSN: | 03270793 |