High resolution Orbitrap mass spectrometry analysis of oxidized hydrocarbons found in freshwater following a simulated spill of crude oil

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...

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Bibliographic Details
Published in:Chemosphere (Oxford) 2022-04, Vol.292, p.133415-133415, Article 133415
Main Authors: Heshka, Nicole E., Peru, Kerry M., Xin, Qin, Dettman, Heather D., Headley, John V.
Format: Article
Language:English
Subjects:
Fresh Water
Freshwater
Hydrocarbons
Mass Spectrometry
Oil spill
Orbitrap
Oxidation
Petroleum
Petroleum Pollution - analysis
Polycyclic Aromatic Hydrocarbons - analysis
Water Pollutants, Chemical - analysis
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Summary: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. [Display omitted] •Conventional crude oil spilled on freshwater in a pilot-scale tank.•Orbitrap MS used to analyze water samples taken for 56 days following the spill.•Data is focused on oxidized organic compounds.•Oxidized compounds increase with time after the initial spill.
ISSN:0045-6535
1879-1298
DOI:10.1016/j.chemosphere.2021.133415