Avaliação Da Extensão Da Biodegradação De Petróleos Brasileiros Com Ênfase Nos N-Alquilciclohexanos

Martins, Larissa Castelo Guedes; Cruz, Georgiana Feitosa da; Santos, Lívia Carvalho; Pudenzi, Marcos A.; Eberlin, Marcos N.

doi:10.21577/0100-4042.20170328

Cited by 1 publication

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“…Accordingly, the 2022 samples were classified as levels 0–2 (none/very slight/slight), while the 2019 samples were placed in level 3 (moderate), indicating an initial chemical modification in n -alkylcyclohexanes (as depicted in Figure S3 of the Supporting Information). This observation aligns with findings reported by Martins et al Consequently, we have concluded that the 2019 samples exhibit a higher degree of biodegradation compared to the 2022 samples.…”

Section: Resultssupporting

confidence: 93%

Geochemical Assessment of Tar Balls That Arrived in 2022 along the Northeast Coast of Brazil and Their Relationship with the 2019 Oil Spill Disaster

Pereira,

Santos,

Lima

et al. 2023

Energy Fuels

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In August 2019, Brazil experienced the country’s greatest environmental disaster involving an oil spill appearing on the beaches. After 3 years, high volumes of tar balls appeared, raising questions regarding their possible relationship with the oil spill of 2019. Herein, an organic geochemistry investigation was performed using gas chromatography–mass spectrometry (GC–MS) and electrospray ionization coupled with Fourier transform mass spectrometry (ESI FT–MS), with the aim of characterizing the chemical components of spilled oils collected in 2019 and comparing them to tar balls from 2022. The contents of n-alkanes, isoprenoids, alkyl cyclohexanes, steranes, terpanes, and phenanthrenes/anthracenes, together with biomarker ratios, suggested that the tar balls originated from a virgin/unprocessed oil with the profile of paraffinic deposits in oil storage tanks, unlike the oils from 2019, which had the characteristics of a processed oil. An interesting difference in polar compound distribution was identified by ESI FT–MS analysis, with lower molecular weight polar components found in the samples from 2022.

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Section: Resultssupporting

confidence: 93%