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A Tale of Two Recent Spills — Comparison of 2014 Galveston Bay and 2010 Deepwater Horizon Oil Spill Residues

View Article: PubMed Central - PubMed

ABSTRACT

Managing oil spill residues washing onto sandy beaches is a common worldwide environmental problem. In this study, we have analyzed the first-arrival oil spill residues collected from two Gulf of Mexico (GOM) beach systems following two recent oil spills: the 2014 Galveston Bay (GB) oil spill, and the 2010 Deepwater Horizon (DWH) oil spill. This is the first study to provide field observations and chemical characterization data for the 2014 GB oil spill. Here we compare the physical and chemical characteristics of GB oil spill samples with DWH oil spill samples and present their similarities and differences. Our field observations indicate that both oil spills had similar shoreline deposition patterns; however, their physical and chemical characteristics differed considerably. We highlight these differences, discuss their implications, and interpret GB data in light of lessons learned from previously published DWH oil spill studies. These analyses are further used to assess the long-term fate of GB oil spill residues and their potential environmental impacts.

No MeSH data available.


Concentration levels of various n-alkanes (ranging from C13 to C30) measured in Galveston Bay and Deepwater Horizon oil spill residues.
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pone.0118098.g005: Concentration levels of various n-alkanes (ranging from C13 to C30) measured in Galveston Bay and Deepwater Horizon oil spill residues.

Mentions: We also quantified n-alkane concentrations by integrating all major peaks for m/z 57, and the concentration levels for various n-alkanes ranging from C13 to C30 are presented in Fig. 5. Using the data shown in Fig. 5, the total amount (values reported as mean ± SD) of n-alkanes in GB and DWH samples are estimated to be 9 ± 1 and 37 ± 2 mg/g of oil, respectively. The total concentration of n-alkanes in GB residues is low since it is a highly refined fuel oil. The ratios of pristane/phytane, C17/pristane, and C18/phytane are often used for source identification [14]. Based on peak responses, the ratios of pristane/phytane, C17/pristane and C18/phytane were calculated as: 1.48 ± 0.04, 2.13 ± 0.04, and 3.21 ± 0.08 for GB sample, and 0.91 ± 0.01, 1.73 ± 0.01, and 2.84 ± 0.02 for DWH sample. These ratios are indicative of the differences in chemical characteristics of these two oils.


A Tale of Two Recent Spills — Comparison of 2014 Galveston Bay and 2010 Deepwater Horizon Oil Spill Residues
Concentration levels of various n-alkanes (ranging from C13 to C30) measured in Galveston Bay and Deepwater Horizon oil spill residues.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4340883&req=5

pone.0118098.g005: Concentration levels of various n-alkanes (ranging from C13 to C30) measured in Galveston Bay and Deepwater Horizon oil spill residues.
Mentions: We also quantified n-alkane concentrations by integrating all major peaks for m/z 57, and the concentration levels for various n-alkanes ranging from C13 to C30 are presented in Fig. 5. Using the data shown in Fig. 5, the total amount (values reported as mean ± SD) of n-alkanes in GB and DWH samples are estimated to be 9 ± 1 and 37 ± 2 mg/g of oil, respectively. The total concentration of n-alkanes in GB residues is low since it is a highly refined fuel oil. The ratios of pristane/phytane, C17/pristane, and C18/phytane are often used for source identification [14]. Based on peak responses, the ratios of pristane/phytane, C17/pristane and C18/phytane were calculated as: 1.48 ± 0.04, 2.13 ± 0.04, and 3.21 ± 0.08 for GB sample, and 0.91 ± 0.01, 1.73 ± 0.01, and 2.84 ± 0.02 for DWH sample. These ratios are indicative of the differences in chemical characteristics of these two oils.

View Article: PubMed Central - PubMed

ABSTRACT

Managing oil spill residues washing onto sandy beaches is a common worldwide environmental problem. In this study, we have analyzed the first-arrival oil spill residues collected from two Gulf of Mexico (GOM) beach systems following two recent oil spills: the 2014 Galveston Bay (GB) oil spill, and the 2010 Deepwater Horizon (DWH) oil spill. This is the first study to provide field observations and chemical characterization data for the 2014 GB oil spill. Here we compare the physical and chemical characteristics of GB oil spill samples with DWH oil spill samples and present their similarities and differences. Our field observations indicate that both oil spills had similar shoreline deposition patterns; however, their physical and chemical characteristics differed considerably. We highlight these differences, discuss their implications, and interpret GB data in light of lessons learned from previously published DWH oil spill studies. These analyses are further used to assess the long-term fate of GB oil spill residues and their potential environmental impacts.

No MeSH data available.