ABSTRACT
Oil spill in the Central Patagonian zone was studied to evaluate if any relationship exists between the parameters used to characterize weathering spilled oil and soil toxicity for two plant species and to evaluate if the phytotoxicity to local species would be a good index for the soil contamination. Nuclear magnetic resonance (NMR) structural indexes and column chromatography compositional indexes were determined to characterize the oil spill in the soil samples. Bioassays were also carried out using Lactuca sativa L (reference) and Atriplex lampa (native species) as test organisms. Measurements of the total petroleum hydrocarbon (TPH) and the electrical conductivity (EC) of the soil were carried out to evaluate the effect on the bioassays. The principal components analysis of the parameters determined by NMR, compositional indexes, EC, TPH, and toxicology data shows that the first three principal components accounted for the 78% of the total variance (40%, 25%, and 13% for the first, second, and third PC, respectively). A good agreement was found between information obtained by compositional indexes and NMR structural indexes. Soil toxicity increases with the increase of EC and TPH. Other factors, such as, the presence of branched and aromatic hydrocarbons is also significant. The statistical evaluation showed that the Euclidean distances (3D) between the background and each one of the samples might be a better indicator of the soil contamination, compared with chemical criterion of TPH.
Subject(s)
Hydrocarbons/chemistry , Magnetic Resonance Spectroscopy/methods , Petroleum Pollution/analysis , Petroleum/analysis , Petroleum/toxicity , Argentina , Germination/drug effects , Hydrocarbons/analysis , Hydrocarbons/toxicity , Soil/chemistryABSTRACT
Se estudio la incidencia de petroleo en suelo sobre la etapa de germinacion de la especie vegetal Grindella chiloensis, comun en la Patagonia argentina, ante dos situacione distintas: caso de contaminacion directa con germinacion en suelos con diferentes contenidos de petroleo, y contaminacion indirecta con germinacion en suelos regados con agua que contiene la fraccion soluble del petroleo
Subject(s)
Argentina , Environmental Pollution , Flora , Hydrocarbons , Petroleum , SoilABSTRACT
Se estudio la incidencia de petroleo en suelo sobre la etapa de germinacion de la especie vegetal Grindella chiloensis, comun en la Patagonia argentina, ante dos situacione distintas: caso de contaminacion directa con germinacion en suelos con diferentes contenidos de petroleo, y contaminacion indirecta con germinacion en suelos regados con agua que contiene la fraccion soluble del petroleo
Subject(s)
Argentina , Flora , Hydrocarbons , Petroleum , Environmental Pollution , SoilABSTRACT
Define y clasifica los modelos ambientales, y señala las características fisicoquímicas que consideran. Explica los modelos ambientales estocásticos, e indica su aplicación a derrames de petróleo en ecosistemas terrestres. Sugiere su uso en los estudios de factibilidad de los proyectos de ingeniería
Subject(s)
Environment , Environmental Models , Environmental Pollution , Oil and Gas Industry , Environment DesignABSTRACT
Define y clasifica los modelos ambientales, y señala las características fisicoquímicas que consideran. Explica los modelos ambientales estocásticos, e indica su aplicación a derrames de petróleo en ecosistemas terrestres. Sugiere su uso en los estudios de factibilidad de los proyectos de ingeniería
