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In Situ Burning for Oil Spill Response in the Arctic: Recovery and Quantification of Chemical Herding Agent OP-40 from Burned Oil Residues

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Abstract

In situ burning (ISB) aided by OP-40 is one of the best suited and effective oil spill response techniques for Arctic conditions. However, the fate of OP-40 in the environment after an ISB event is not fully understood, especially the amount of OP-40 remaining within the burned oil residues. Previous studies reported partial accumulation of OP-40 in water, and no OP-40 was measured in the air emissions following the burn. Accumulation of OP-40 in burned oil residues is not appropriately quantified as it is challenging to process and analyze burned oil samples in the laboratory, and there exists no standard method in the literature to measure and quantify OP-40 in burned residues. In this work, we report on the development of an analytical method for the quantification of OP-40 in burned oil residues using column chromatography, followed by gas chromatography–mass spectrometry analysis which was successfully employed to measure more than 90% of the applied OP-40 in the burned residues for controlled bench-scale burns. Additionally, the robustness of the developed method was further tested by measuring OP-40 in burn residues from ISBs conducted at different oil–water emulsion ratios (60–100% oil) and water temperatures (4–35 °C), wherein known amounts of OP-40 were added to the residues. Results indicate that the method is equally effective for different oil–water emulsions, but the OP-40 recoveries (89.2–115.6%) are significantly higher at warmer temperatures than the OP-40 recoveries (87.0–103.3%) at colder temperatures. Overall, the method developed in this work could assist in the understanding of the fate of OP-40 in a potentially important environmental matrix of burned oil residues that are left behind sometimes long (weeks to years) after an ISB event.

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Funding

Author S.A. acknowledges support from an early career research fellowship from the Gulf Research Program of the National Academies of Sciences, Engineering, and Medicine (NASEM). The content is solely the responsibility of the authors and does not necessarily represent the official views of the Gulf Research Program of the National Academies of Sciences, Engineering, and Medicine.

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Correspondence to Srijan Aggarwal.

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Hasan, M.I., Aggarwal, S. In Situ Burning for Oil Spill Response in the Arctic: Recovery and Quantification of Chemical Herding Agent OP-40 from Burned Oil Residues. Arch Environ Contam Toxicol 84, 153–163 (2023). https://doi.org/10.1007/s00244-022-00958-z

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  • DOI: https://doi.org/10.1007/s00244-022-00958-z

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