Artículos de revistas
Source apportionment in oil spill remediation
Registro en:
Journal of Environmental Monitoring 14
1464-0325
Autor
Muñoz, Jorge
Mudge, Stephen
Loyola, Rodrigo
Muñoz, Gonzalo
Bravo, Claudio
Resumen
Artículo de publicación ISI A pipe rupture during unloading led to a spillage of 350–700 tonnes of Caño Limon, a light sweet crudeoil, into San Vicente Bay in 2007. Initial clean-up methods removed the majority of the oil from thesandy beaches although some oil remained on the rocky shores. It was necessary for the responsibleparty to clean the spilled oil even though at this location there were already crude oil hydrocarbonsfrom previous industrial activity. A biosolvent based on vegetable oil derivatives was used to solubilisethe remaining oil and a statistical approach to source apportionment was used to determine the efficacyof the cleaning. Sediment and contaminated rock samples were taken prior to cleaning and again at thesame locations two days after application of the biosolvent. The oil was extracted using a modifiedUSEPA Method 3550B. The alkanes were quantified together with oil biomarkers on a GC-MS. Thecontribution that Ca~no Limon made to the total oil hydrocarbons was calculated from a Partial LeastSquares (PLS) analysis using Caño Limon crude oil as the source. By the time the biosolvent wasapplied, there had already been some attenuation of the oil with all alkanes <C16removed. Aftertreatment, more of the mid-chain length compounds had been removed leading a skew towards thelonger chain length compounds in the samples. The steranes provided a good indication of the source ofthe oil in this case and the contribution that Caño Limon made to the total oil ranged from 0% to 74%.The total hydrocarbon concentrations were lower after cleaning indicating an efficacy of 90% althoughthe reduction in Caño Limon oil was smaller. This was sufficient to make further remediation unnecessary.