Photochemical changes in water accommodated fractions of MC252 and surrogate oil created during solar exposure as determined by FT-ICR MS

Pamela P. Vaughan; Tashiema Wilson; Rebecca Kamerman; Melissa E. Hagy; Amy McKenna; Huan Chen; Wade H. Jeffrey

doi:10.1016/j.marpolbul.2016.01.012

Photochemical changes in water accommodated fractions of MC252 and surrogate oil created during solar exposure as determined by FT-ICR MS

Pamela P. Vaughan, Tashiema Wilson, Rebecca Kamerman, Melissa E. Hagy, Amy McKenna, Huan Chen, Wade H. Jeffrey

Research output: Contribution to journal › Article › peer-review

36 Scopus citations

Abstract

To determine effects of photochemical weathering of petroleum, surrogate and Macondo (MC252) crude oils were exposed to solar radiation during the formation of Water Accommodated Fractions (WAFs) in sterile seawater. Samples were incubated in either unfiltered sunlight, with ultraviolet radiation blocked (Photosynthetically Active Radiation [PAR] only), or in darkness. WAFs were collected at two time points over the course of a week. Fourier Transform Ion Cyclotron Resonance Mass Spectrometry (FT-ICR MS) analyses of water soluble species formed during exposure to sunlight were compared for the different treatments. Photochemical alterations resulted in differences in compound class distributions. In general, surrogate oil was photo-oxidized across a wider carbon number range compared to MC252. While photochemical differences were observed between MC252 and surrogate oils, microbial production in seawater responded similarly to both WAFs from both types of oils with the majority of the inhibition resulting from oil exposure to visible light.

Original language	English
Pages (from-to)	262-268
Number of pages	7
Journal	Marine Pollution Bulletin
Volume	104
Issue number	1-2
DOIs	https://doi.org/10.1016/j.marpolbul.2016.01.012
State	Published - Mar 15 2016
Externally published	Yes

Funding

This research was made possible in part by a grant from The Gulf of Mexico Research Initiative as part of the DEEP-C and C-IMAGE consortia. Data are publicly available through the Gulf of Mexico Research Initiative Information & Data Cooperative (GRIIDC) at https://data.gulfresearchinitiative.org . This research was also supported by NSF DMR 11-54790 State of Florida grant. The authors thank Dr. Ryan P. Rodgers (NHMFL) for his helpful discussions.

Funders	Funder number
National Science Foundation	DMR 11-54790
Gulf of Mexico Research Initiative

Keywords

FT-ICR MS
Oil spill
Petroleum
Photochemistry
Toxicity
Weathering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.marpolbul.2016.01.012

Cite this

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title = "Photochemical changes in water accommodated fractions of MC252 and surrogate oil created during solar exposure as determined by FT-ICR MS",

abstract = "To determine effects of photochemical weathering of petroleum, surrogate and Macondo (MC252) crude oils were exposed to solar radiation during the formation of Water Accommodated Fractions (WAFs) in sterile seawater. Samples were incubated in either unfiltered sunlight, with ultraviolet radiation blocked (Photosynthetically Active Radiation [PAR] only), or in darkness. WAFs were collected at two time points over the course of a week. Fourier Transform Ion Cyclotron Resonance Mass Spectrometry (FT-ICR MS) analyses of water soluble species formed during exposure to sunlight were compared for the different treatments. Photochemical alterations resulted in differences in compound class distributions. In general, surrogate oil was photo-oxidized across a wider carbon number range compared to MC252. While photochemical differences were observed between MC252 and surrogate oils, microbial production in seawater responded similarly to both WAFs from both types of oils with the majority of the inhibition resulting from oil exposure to visible light.",

keywords = "FT-ICR MS, Oil spill, Petroleum, Photochemistry, Toxicity, Weathering",

author = "Vaughan, {Pamela P.} and Tashiema Wilson and Rebecca Kamerman and Hagy, {Melissa E.} and Amy McKenna and Huan Chen and Jeffrey, {Wade H.}",

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doi = "10.1016/j.marpolbul.2016.01.012",

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AU - Vaughan, Pamela P.

AU - Wilson, Tashiema

AU - Kamerman, Rebecca

AU - Hagy, Melissa E.

AU - McKenna, Amy

AU - Chen, Huan

AU - Jeffrey, Wade H.

PY - 2016/3/15

Y1 - 2016/3/15

N2 - To determine effects of photochemical weathering of petroleum, surrogate and Macondo (MC252) crude oils were exposed to solar radiation during the formation of Water Accommodated Fractions (WAFs) in sterile seawater. Samples were incubated in either unfiltered sunlight, with ultraviolet radiation blocked (Photosynthetically Active Radiation [PAR] only), or in darkness. WAFs were collected at two time points over the course of a week. Fourier Transform Ion Cyclotron Resonance Mass Spectrometry (FT-ICR MS) analyses of water soluble species formed during exposure to sunlight were compared for the different treatments. Photochemical alterations resulted in differences in compound class distributions. In general, surrogate oil was photo-oxidized across a wider carbon number range compared to MC252. While photochemical differences were observed between MC252 and surrogate oils, microbial production in seawater responded similarly to both WAFs from both types of oils with the majority of the inhibition resulting from oil exposure to visible light.

AB - To determine effects of photochemical weathering of petroleum, surrogate and Macondo (MC252) crude oils were exposed to solar radiation during the formation of Water Accommodated Fractions (WAFs) in sterile seawater. Samples were incubated in either unfiltered sunlight, with ultraviolet radiation blocked (Photosynthetically Active Radiation [PAR] only), or in darkness. WAFs were collected at two time points over the course of a week. Fourier Transform Ion Cyclotron Resonance Mass Spectrometry (FT-ICR MS) analyses of water soluble species formed during exposure to sunlight were compared for the different treatments. Photochemical alterations resulted in differences in compound class distributions. In general, surrogate oil was photo-oxidized across a wider carbon number range compared to MC252. While photochemical differences were observed between MC252 and surrogate oils, microbial production in seawater responded similarly to both WAFs from both types of oils with the majority of the inhibition resulting from oil exposure to visible light.

KW - FT-ICR MS

KW - Oil spill

KW - Petroleum

KW - Photochemistry

KW - Toxicity

KW - Weathering

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Photochemical changes in water accommodated fractions of MC252 and surrogate oil created during solar exposure as determined by FT-ICR MS

Abstract

Funding

Keywords

UN SDGs

Access to Document

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