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Evaluation of Aliphatic Hydrocarbons in Surface Sediments of Lagoa Mirim (RS, Brazil)

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Abstract

In this study, the hydrocarbons (HCs) levels in sediments from Lagoa Mirim, situated in the south of Brazil, were verified. The methodology brought together stages of pre-sonification, soxhlet extraction, and determination by gas chromatography coupled with mass spectrometry (GC/MS). Ten sample points were evaluated where ∑n-alkanes varied between 1.46 µg kg−1 ± 4.0% and 10.10 µg kg−1 ± 17.6%. Diagnostic indexes were calculated, being: Carbon Preferential Index (CPI), terrestrial/aquatic ratio (TAR), unresolved complex mixture (UCM), UCM/∑n-alkanes ratio, and n-alkane ratio with Low molecular weight hydrocarbon and High molecular weight hydrocarbons (HMW/LMW). In general, the results of this study indicate a low anthropogenic impact in the environment.

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Adapted from Lagoa Mirim Agency and Google maps (https://www.google.com.br/maps/@-32.2886769,-52.5632871,10z)

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Acknowledgements

The authors would like to acknowledge FAPERGS and PROPESP - IFSUL for their financial support.

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Correspondence to Pedro José Sanches Filho.

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Arduim, J., da Silva Amaral, M.A.F., Andrade, G.O. et al. Evaluation of Aliphatic Hydrocarbons in Surface Sediments of Lagoa Mirim (RS, Brazil). Bull Environ Contam Toxicol 107, 466–474 (2021). https://doi.org/10.1007/s00128-021-03343-z

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  • DOI: https://doi.org/10.1007/s00128-021-03343-z

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