Polycyclic aromatic hydrocarbons in sediments and fish species from the White Nile, East Africa: Bioaccumulation potential, source apportionment, ecological and health risk assessment

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dc.contributor.authorAbayi, Juma John Moses
dc.contributor.authorTombe Gore, Christopher
dc.contributor.authorNagawa, Christine
dc.contributor.authorBandowe, Benjamin A.Musa
dc.contributor.authorMatovu, Henry
dc.contributor.authorMubiru, Edward
dc.contributor.authorChelangat Ngeno, Emily
dc.contributor.authorOdongo, Silver
dc.contributor.authorSillanpaa, Mika
dc.contributor.authorSsebugere, Patrick
dc.date.accessioned2023-04-29T17:24:44Z
dc.date.available2023-04-29T17:24:44Z
dc.date.issued2021
dc.description.abstractThe impact of oil exploration and production activities on the environment of sub-saharan African countries is not well studied. This study aimed at determining concentrations, sources, and bioaccumulation of 13 polycyclic aromatic hydrocarbons (PAHs) in sediments and fish from the White Nile near Melut oil fields, South Sudan. The study also assessed the ecological and human health risk associated with PAHs in this aquatic system. Total ( P 13) PAH concentrations ranged from 566 to 674 ng g 1dry weight (dw) in sediments, while those in fish were 191e1143 ng g 1 wet weight (ww). P 13PAH concentrations were significantly higher in C. gariepinus than in other fish species. Low molecular weight PAHs (LPAHs) dominated the profile of PAHs in sediments (constituted 95% of P P 13PAHs) and fish (97% of 13PAHs). Compared to Sediment Quality Guidelines of the United States Oceanic and Atmospheric Administration, the levels of LPAHs in this study were all above the threshold effect limits, but below the probable effect level, while those of high molecular weight PAHs (HPAHs) were all below the lowest effect levels. The carcinogenic potency equivalent concentrations of PAHs in L. niloticus and C. gariepinus were above the US EPA screening level; suggesting consumption of these species could adversely affect human health. Biota-sediment accumulation factor values (range: 0.006e3.816 g OC g 1 lipid) for PAHs showed high bioaccumulation of LPAHs in fish muscle, and that bioaccumulation decreased with increase in hydrophobicity of the compounds. This is possibly because LPAHs have higher aqueous solubilities which increases their bioavailability through water-gill transfers compared to HPAHs. Profiles of PAHs in the White Nile environment indicate predominant contribution from petrogenic sources, which could be attributed to presence of crude oil reservoirs and oil production operations. More research into the levels of other environmental pollutants in the oil-rich area is recommended.en_US
dc.identifier.citationAbayi, J. J. M., Gore, C. T., Nagawa, C., Bandowe, B. A. M., Matovu, H., Mubiru, E., ... & Ssebugere, P. (2021). Polycyclic aromatic hydrocarbons in sediments and fish species from the White Nile, East Africa: Bioaccumulation potential, source apportionment, ecological and health risk assessment. Environmental Pollution, 278, 116855. https://doi.org/10.1016/j.envpol.2021.116855en_US
dc.identifier.urihttps://doi.org/10.1016/j.envpol.2021.116855
dc.identifier.urihttps://nru.uncst.go.ug/handle/123456789/8589
dc.language.isoenen_US
dc.publisherEnvironmental Pollutionen_US
dc.subjectPolycyclic aromatic hydrocarbonsen_US
dc.subjectCancer risken_US
dc.subjectBioaccumulationen_US
dc.subjectEcological risken_US
dc.titlePolycyclic aromatic hydrocarbons in sediments and fish species from the White Nile, East Africa: Bioaccumulation potential, source apportionment, ecological and health risk assessmenten_US
dc.typeArticleen_US
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