Journal
CHEMOSPHERE
Volume 292, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2021.133415
Keywords
Orbitrap; Oxidation; Hydrocarbons; Freshwater; Oil spill
Categories
Funding
- Government of Canada's Oceans Protection Plan
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Negative ion electrospray Orbitrap mass spectrometry was utilized to analyze the impact of conventional crude oil on freshwater samples. Findings revealed that while concentrations of polycyclic aromatic hydrocarbons decreased over time, levels of total organic carbon and oxidized species increased, with O2 and O3 species showing the highest abundance.
Negative ion electrospray Orbitrap mass spectrometry was used to analyze water samples taken from a pilot-scale spill tank test of conventional crude oil on freshwater. A 56-day spill test was performed, and water samples were taken at regular intervals throughout the test to determine what changes in water chemistry occur with time. Orbitrap mass spectrometry was used to measure oxidized species in water samples, and oxidized species are analyzed by carbon number, double bond equivalent and hydrocarbon class. Emphasis is placed on changes with time over the course of the spill test, to examine changes by weathering processes that could occur naturally in a field spill scenario. Results demonstrate that while the concentrations of polycyclic aromatic hydrocarbons decrease in the water phase over time, the concentrations of total organic carbon and oxidized species in the water increase with time, where quantities of O2 and O3 species have the highest abundance. Measurement of increasing concentrations and changing relative abundances of these oxidized compounds can be used to assess how oil behaves in a freshwater aquatic environment after a spill.
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