TITLE:
Dynamic Behavior of Polycyclic Aromatic Hydrocarbons and Their Derivatives after Oils Spill in Water
AUTHORS:
Pranudda Pimsee, Caroline Sablayrolles, Mireille Montréjaud-Vignoles, Julien Guyomarch, Nicolas Lesage, Pascale de Caro
KEYWORDS:
Monitoring, Water Soluble Fraction, PAHs, Stir Bar Sorptive Extraction
JOURNAL NAME:
Journal of Environmental Protection,
Vol.5 No.8,
June
16,
2014
ABSTRACT: Within the framework of Migr’Hycar research
project, the fate of oil spill was studied with the aim to characterize their
physical-chemical behaviour. For this purpose, seven petroleum oils commercially
available were tested and the distributions of the water soluble components
were determined according to two experimental devices; laboratory conditions
and pilot conditions in Polludrome. In the dissolved fraction, 41 polycyclic
aromatic hydrocarbons and their derivates were quantified, among them are 16
EPA priority pollutants. A coupling of the stir bar sorptive extraction method
and high performance gas chromatography mass spectrometry were used. Analyses
showed that naphthalenes series constitute the major part of the water soluble
fraction from fresh oils. In fact, light and heavy molecules have different
contributions to solubilization kinetics. From the results, a linear
correlation was established between the density of oils and the times of
maximum solubilization. Moreover, the effect of 10% ethanol in gasoline was
observed on the profile of solubilized PAHs in water. Kinetic patterns obtained
with Polludrome showed the influence of surface water/oil ratio (WOR) on the
volatilization process. Compared to laboratory conditions, the dynamic
conditions of Polludrome led to an enhanced evaporation process, thus shifting
the solubility peak.