Geochemical Investigation of Tar Balls Collected in a Brazilian Beach Using Biomarkers, Ni/V, δ13C Ratios and Ultra-High Resolution FT‑ICR Mass Spectrometry

Autor:	Lívia Carvalho Santos, Bárbara D. Lima, Heliara D. Lopes Nascimento, Laercio Lopes Martins, Eliane Soares de Souza, Marcos A. Pudenzi, Georgiana Feitosa da Cruz, Marcos N. Eberlin
Rok vydání:	2020
Předmět:	δ13C Stable isotope ratio Chemistry Electrospray ionization Analytical chemistry FT-ICR MS Tar chemistry.chemical_element General Chemistry tar ball Mass spectrometry Fourier transform ion cyclotron resonance oil spill geochemical analysis weathering process Gas chromatography Carbon
Zdroj:	Journal of the Brazilian Chemical Society, Volume: 31, Issue: 4, Pages: 673-682, Published: 23 MAR 2020 Journal of the Brazilian Chemical Society v.31 n.4 2020 Journal of the Brazilian Chemical Society Sociedade Brasileira de Química (SBQ) instacron:SBQ
ISSN:	0103-5053
DOI:	10.21577/0103-5053.20190231
Popis:	Representative tar balls collected in two distinct years (2012 and 2014) in a beach along the State of Bahia, northeastern Brazil, were geochemically characterized in order to identify correlations between them and investigate potential sources. Terpanes and steranes biomarkers (detected by gas chromatography coupled to mass spectrometry, GC-MS), carbon stable isotope ratio (δ13C), Ni and V ratios and polar compounds by Fourier transform ion cyclotron resonance mass spectrometry using electrospray ionization in negative mode (ESI(-) FT-ICR MS) were evaluated. Three Brazilian oil samples from distinct sources were assessed as possible spill sources, comparing their results with the tar ball samples. Using chemometric techniques, it was verified correlation between the two set of tar ball samples, suggesting same source. However, no correlation with the oil samples was observed, with different geochemical profile among them. The heteroatom class distribution displayed severe degradation levels for tar balls and its seems that photo-oxidation and biodegradation processes were further relevant. Tar ball samples show multiple classes, most oxygenated, and with one sample showing considerable relative abundance of N1 class, suggesting it is from a more recent oil spill. In brief, our results suggest that the region, with very sensitive ecosystem, is possibly subjected to frequent spills from the same source.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8a8a3c5485dac5e0346d68ab0e91305b https://doi.org/10.21577/0103-5053.20190231 Zobrazit plný text záznamu