Produção Nacional
Polycyclic aromatic hydrocarbons in suspended particulate matter of a region influenced by agricultural activities in northeast Brazil
2022; Elsevier BV; Volume: 57; Linguagem: Inglês
10.1016/j.rsma.2022.102683
ISSN2352-4855
AutoresEwerton Santos, Michel R.R. Souza, Antônio R.V., Laiane da Silva Soares, Morgana Frena, Marcelo R. Alexandre,
Tópico(s)Effects and risks of endocrine disrupting chemicals
ResumoSuspended particulate matter (SPM) samples were collected in rainy (2016) and dry (2017) seasons from the Japaratuba River in Northeast Brazil and analyzed the concentration of 16 priority polycyclic aromatic hydrocarbons (PAHs). The results were applied to measure the seasonal variations, spatial distributions, and source apportionment in the estuarine SPM systems. The seasonal variation in total PAHs was not statistically significant, although the highest levels were found in the rainy season, where the total PAHs concentrations in the Japaratuba River ranged from 71 to 1598 ng g−1, with a mean value of 453 ng g−1. In the dry season, the concentrations ranged from 65 to 459 ng g−1, with a mean value of 257 ng g−1. The composition profiles of PAHs at different sites were not significant. At most sampling sites, 5-ring and 6-ring compounds (indeno(1,2,3-cd)pyrene, dibenzo(a,h)anthracene, and benzo(g,h,i)perylene) were the most abundant components, followed by 2-ring and 3-ring compounds (naphthalene and phenanthrene). The use of diagnostic ratios (DR) and principal component analysis (PCA) showed that the PAHs mainly originated from pyrogenic sources. Ecological risk assessment indicated that the PAHs could cause moderate impacts on organisms, suggesting the need for preventive measures.
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