Abstract
Itaipu Lake, which includes the Itaipu hydroelectric power plant, is one of the largest dams in the world and has a strong relationship with its surroundings. The flooded area has multiple uses such as navigation, recreation, water abstraction for industrial, urban and agricultural irrigation. The lake is located at the frontier between Brazil, Argentina and Paraguay. In this study, superficial sediments collected from nine sampling sites were analysed for grain size, organic matter and 16 priority polycyclic aromatic hydrocarbons (PAHs) using high-performance liquid chromatography (HPLC) with fluorescence detector. The total concentration of PAHs in the dry sediment ranged from 35.21 to 685.37 µg kg−1. Diagnostic ratios showed that the possible source of PAHs in the Itaipu Lake could be pyrolitic and petrogenic. The potential toxicity of sediment of PAHs varied from not detected to 127.70 µg g−1, suggesting that some adverse ecological effects would arise due to PAHs in these sediments.
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The authors thank the financial support provided by FINEP, CAPES, CNPq and Fundação Araucária. Daiane Finger thanks the scholarship from CAPES for doctoral studies.
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Kalwa, M., Quináia, S.P., Pletsch, A.L. et al. Polycyclic aromatic hydrocarbons in surface sediments of Binacional Itaipu Lake, Brazil: characteristics, sources and toxicity evaluation. Environ Earth Sci 72, 4473–4481 (2014). https://doi.org/10.1007/s12665-014-3347-x
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DOI: https://doi.org/10.1007/s12665-014-3347-x