Weathering impacts on petroleum biomarker, aromatic, and polar compounds in the spilled oil at the northeast coast of Brazil over time.
Mar Pollut Bull
; 189: 114744, 2023 Apr.
Article
en En
| MEDLINE
| ID: mdl-36870139
ABSTRACT
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 Ox>2/O, SOx/SO, and SOx/N.
Palabras clave
Texto completo:
1
Base de datos:
MEDLINE
Asunto principal:
Hidrocarburos Policíclicos Aromáticos
/
Contaminantes Químicos del Agua
/
Petróleo
/
Contaminación por Petróleo
País/Región como asunto:
America do sul
/
Brasil
Idioma:
En
Revista:
Mar Pollut Bull
Año:
2023
Tipo del documento:
Article