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Spartial and Seasonal Variations in Concentrations of Polycyclic Aromatic Hydrocarbons in Water and Sediment of Kisumu City Bay of Winam Gulf, Lake Victoria-Kenya

Abstract

Seasonal and offshore concentration variations for selected sixteen priority pollutant polycyclic aromatic hydrocarbons (PAHs) in surface sediments and water of Car Wash and Kisat areas of Winam Gulf, Lake Victoria, have been investigated. PAHs concentrations in sediments and water range from 0.4 to 31.95 μg/g dry weight and 3.32 to 55.8 μg/L, respectively. Statistical analysis of the PAHs concentrations showed that the most contaminated samples are found during rainy season (April, 2006), 5 m offshore for sediments and 10 m offshore for water. Dry season (October, 2005) generally recorded lower concentrations. The variations showed significant difference (p ≤ 0.05) with season and distance of sampling from the shore.

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Acknowledgments

This work was supported Department of Chemistry, Maseno University in Kenya. We acknowledge Department of Physical Sciences, Masinde Muliro University of Science and Technology-Kenya, for the help in laboratory analytical work and Prof. Dr. K. W. Schramm of Institute of Ecological Chemistry, Helmholtz Zentrum, Munich, Germany who donated the standards used in this work.

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Correspondence to Bowa O. Kwach or Joseph O. Lalah.

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Kwach, B.O., Lalah, J.O. & Shem, W.O. Spartial and Seasonal Variations in Concentrations of Polycyclic Aromatic Hydrocarbons in Water and Sediment of Kisumu City Bay of Winam Gulf, Lake Victoria-Kenya. Bull Environ Contam Toxicol 83, 734 (2009). https://doi.org/10.1007/s00128-009-9830-5

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Keywords

  • PAHs
  • Sediment
  • Pollution
  • Kisat
  • Car wash
  • Lake Victoria