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Article

Marine Snow Aggregates are Enriched in Polycyclic Aromatic Hydrocarbons (PAHs) in Oil Contaminated Waters: Insights from a Mesocosm Study

1
Department of Marine Biology, Texas A&M University at Galveston, Galveston, TX 77553, USA
2
Department of Marine and Coastal Environmental Science, Texas A&M University at Galveston, Galveston, TX 77553, USA
3
Department of Biological Sciences, College of Science and Mathematics, Mindanao State University-Iligan Institute of Technology, Iligan, Lanao del Norte 9200, Philippines
4
Geochemical and Environmental Research Group, Texas A&M University, College Station, TX 77845, USA
5
Department of Oceanography, Texas A&M University, College Station, TX 77843, USA
*
Author to whom correspondence should be addressed.
J. Mar. Sci. Eng. 2020, 8(10), 781; https://doi.org/10.3390/jmse8100781
Received: 11 August 2020 / Revised: 1 October 2020 / Accepted: 2 October 2020 / Published: 7 October 2020
(This article belongs to the Special Issue Degradation of Marine Oil Pollution)
Marine snow was implicated in the transport of oil to the seafloor during the Deepwater Horizon oil spill, but the exact processes remain controversial. In this study, we investigated the concentrations and distributions of the 16 USEPA priority polycyclic aromatic hydrocarbons (PAHs) in marine snow aggregates collected during a mesocosm experiment. Seawater only, oil in a water accommodated fraction (WAF), and Corexit-enhanced WAF (DCEWAF) were incubated for 16 d. Both WAF and DCEWAF aggregates were enriched in heavy molecular weight PAHs but depleted in naphthalene. DCEWAF aggregates had 2.6 times more total 16 PAHs than the WAF (20.5 vs. 7.8 µg/g). Aggregates in the WAF and DCEWAF incorporated 4.4% and 19.3%, respectively of the total PAHs in the mesocosm tanks. Our results revealed that marine snow sorbed and scavenged heavy molecular weight PAHs in the water column and the application of Corexit enhanced the incorporation of PAHs into the sinking aggregates. View Full-Text
Keywords: polycyclic aromatic hydrocarbons (PAHs), marine snow; oil spill; mesocosm; Gulf of Mexico; water accommodated fraction (WAF) polycyclic aromatic hydrocarbons (PAHs), marine snow; oil spill; mesocosm; Gulf of Mexico; water accommodated fraction (WAF)
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MDPI and ACS Style

Bacosa, H.P.; Kamalanathan, M.; Cullen, J.; Shi, D.; Xu, C.; Schwehr, K.A.; Hala, D.; Wade, T.L.; Knap, A.H.; Santschi, P.H.; Quigg, A. Marine Snow Aggregates are Enriched in Polycyclic Aromatic Hydrocarbons (PAHs) in Oil Contaminated Waters: Insights from a Mesocosm Study. J. Mar. Sci. Eng. 2020, 8, 781. https://doi.org/10.3390/jmse8100781

AMA Style

Bacosa HP, Kamalanathan M, Cullen J, Shi D, Xu C, Schwehr KA, Hala D, Wade TL, Knap AH, Santschi PH, Quigg A. Marine Snow Aggregates are Enriched in Polycyclic Aromatic Hydrocarbons (PAHs) in Oil Contaminated Waters: Insights from a Mesocosm Study. Journal of Marine Science and Engineering. 2020; 8(10):781. https://doi.org/10.3390/jmse8100781

Chicago/Turabian Style

Bacosa, Hernando P., Manoj Kamalanathan, Joshua Cullen, Dawei Shi, Chen Xu, Kathleen A. Schwehr, David Hala, Terry L. Wade, Anthony H. Knap, Peter H. Santschi, and Antonietta Quigg. 2020. "Marine Snow Aggregates are Enriched in Polycyclic Aromatic Hydrocarbons (PAHs) in Oil Contaminated Waters: Insights from a Mesocosm Study" Journal of Marine Science and Engineering 8, no. 10: 781. https://doi.org/10.3390/jmse8100781

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