Distribution of polycyclic aromatic hydrocarbons in marine sediments and their potential toxic effects
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The presence of polycyclic aromatic hydrocarbons (PAHs) in samples of marine sediments from Paranagua Bay on the southern coast of Brazil was investigated. Paranagua Bay is the location of a major port, one of the busiest in Brazil. The region has a great potential for tourism and port-related industries and activities. Due to its characteristics as a venue for tourism, two major campaigns were planned: one 3 months before the summer (between December and February) and a second after the vacation season. Total concentration of PAHs in sediments ranged from 26.33 to 406.76 ng/g (in both campaigns). The highest values were found in sediments with higher organic carbon content. We found no substantial differences between the two campaigns, and the values are quite similar. Ternary diagrams show that points P5 and P6 were considered polluted, while others were classified as non-polluted. Molecular ratios indicate that the main sources of PAHs are petrogenic and the burning of fossil fuels. Sediment toxicity was assessed by the presence of PAHs in terms of benzo(a)pyrene (BaP) concentration. The toxicity of PAHs mixtures can be characterized more accurately by developing and establishing toxic equivalency factors (TEFs) for PAHs. Considering TEFs, the BaPeq concentrations vary between 0.264 and 5.922 ng/g (considering both campaigns). Thus, two points are above the maximum level recommended (3 ng/g) by the Netherlands sediment quality guidelines. In fact, sites P5 and P6 apparently are exposed to a greater number of pollution sources, thus reflecting the higher concentration of PAHs compounds in sediments.
KeywordsMarine sediments Toxic equivalency factors Polycyclic aromatic hydrocarbons Estuary
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- Baird, W. M., Courter, L. A., Jeknic, T. M., Fischer, K., Bildfell, R., Giovanni, J., et al. (2007). Urban dust particulate matter alters PAH-induced carcinogenesis by inhibition by CYP1A1 and CYP1B1. Toxicological Sciences, 95(1), 63–73.Google Scholar
- Canadian Ministry of Environment—Sediment Guidelines (2008). http://www.ene.gov.on.ca/en/. Accessed Jan 2008.
- Dorn, P. B., Saterbak, A., Toy, R. J., McMain, B. J., & Williams, P. (2000). Ecotoxicological and analytical assessment of effects of bioremediation on hydrocarbon-containing soils. Environmental Toxicology and Chemistry, 19(11), 2643–2652. doi: 10.1897/1551-5028(2000)019<2643:EAAAOE>2.0.CO;2.CrossRefGoogle Scholar
- Froehner, S., Zeni, J., Da Luz, E. C., & Maceno, M. (2009). Characterization of granulometric and chemical composition of sediments of Barigüi river samples and their capacity to retain polycyclic aromatic hydrocarbons. Water Air Soil Pollution (in press). doi: 10.1007/s11270-009-0020-1.Google Scholar
- IARC (1991). Monographs on the evaluation of carcinogenic risk of chemicals to humans (Vol. 53, 440 pp.). Lyon, France: International Agency for Research on Cancer.Google Scholar
- Lana, P. C., Marone, E., Lopes, R. M., & Machado, E. C. (2000). The subtropical estuarine complex of Paranagua Bay, Brazil. In Ecological studies, coastal marine ecosystems of Latin America (Vol. 144, pp. 131–145). Berlin: Springer Verlag.Google Scholar
- Lichtfouse, E., Bardoux, G., Mariotti, A., Balesdent, J., Ballentine, D. C., & Macko, A. (1997). Molecular, 13C and 14C evidence for the allochthonous and ancient origin of C16–C18 n-alkanes in modern soils. Geochimica et Cosmochimica Acta, 61(9), 1891–1898. doi: 10.1016/S0016-7037(97)00021-5.CrossRefGoogle Scholar
- Lichtfouse, E., & Budzinski, H. (1995). 13C analysis of molecular organic substances, a novel breakthrough in analytical sciences. Analysis, 23(3), 364–369.Google Scholar
- Long, E. R., & Morgan, L. G. (1990). The potential for biological effects of sediment-sorbed contaminants tested in the National Status and Trends Program: Seattle, Wash., National Oceanic and Atmospheric Administration. NOAA Technical Memorandum NOS OMA, 62, 175.Google Scholar
- Sirece, M. A., Marty, J. C., Saliot, A., Aparicio, X., Grimalt, J., & Albaiges, J. (1987). Aliphatic and aromatic hydrocarbons in different sized aerosols over the Mediterranean Sea: Occurrence and origin. Atmospheric Environment, 21(10), 2247–2259. doi: 10.1016/0004-6981(87)90356-8.CrossRefGoogle Scholar
- van der Gaag, M. A., Stortelder, P. B. M., van der Kooij, L. A., & Bruggeman, W. A. (1991). Setting environmental quality criteria for water and sediment in the Netherlands. A pragmatic ecotoxicological approach. European Water Management, 1(3), 13–20.Google Scholar