Lima Bárbara D, Martins Laercio L, Pereira Vinícius B, Franco Danielle M M, Dos Santos Ignes R, Santos Jandyson M, Vaz Boniek G, Azevedo Débora A, da Cruz Georgiana F
Laboratório de Engenharia e Exploração de Petróleo (LENEP), Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF), 27910-970 Macaé, RJ, Brazil.
Laboratório de Engenharia e Exploração de Petróleo (LENEP), Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF), 27910-970 Macaé, RJ, Brazil; Instituto de Ciências do Mar (LABOMAR), Universidade Federal do Ceará (UFC), Fortaleza, CE, Brazil.
Mar Pollut Bull. 2023 Apr;189:114744. doi: 10.1016/j.marpolbul.2023.114744. Epub 2023 Mar 3.
After the wide oil spill reached the northeast of Brazil, the resurgence of oil was recorded and to evaluate this oil in detail, two samples collected in the state of Pernambuco in 2019 and 2021 were submitted to multiple analytical techniques. For both, we have found similar saturated biomarkers and triaromatic steroid ratios, implying that they are from the same spilled source. The n-alkanes, isoprenoids, and cycloalkanes were almost completely degraded due to evaporation, photooxidation, and/or biodegradation processes. The preferential loss of less alkylated PAHs than the more alkylated ones suggests that biodegradation was the most active process. This hypothesis is reinforced by the formation of mono and dicarboxylic acids assessed by GC × GC-TOFMS and ESI(-) FT-ICR MS high-resolution techniques. Furthermore, based on the ESI(-) FT-ICR MS results, three new ratios were proposed to evaluate the progress of the biodegradation process over time: O/O, SO/SO, and SO/N.
大面积石油泄漏到达巴西东北部后，记录到了石油的复苏情况。为了详细评估这种石油，2019年和2021年在伯南布哥州采集的两个样本被采用了多种分析技术。对于这两个样本，我们发现了相似的饱和生物标志物和三芳甾烷比率，这意味着它们来自同一泄漏源。由于蒸发、光氧化和/或生物降解过程，正构烷烃、类异戊二烯和环烷烃几乎完全降解。与烷基化程度较高的多环芳烃相比，烷基化程度较低的多环芳烃优先损失，这表明生物降解是最活跃的过程。通过气相色谱-质谱联用仪（GC×GC-TOFMS）和电喷雾电离负离子傅里叶变换离子回旋共振质谱（ESI(-) FT-ICR MS）高分辨率技术评估的一元和二元羧酸的形成，进一步证实了这一假设。此外，基于ESI(-) FT-ICR MS结果，提出了三个新的比率来评估生物降解过程随时间的进展：O/O、SO/SO和SO/N。
