DETERMINATION OF POLYCYCLIC AROMATIC HYDROCARBONS (PAHS) IN OREOCHROMIS NILOTICUS FROM OGUN RIVER AT AJEGUNLE, LAGOS STATE.
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Abstract
Polycyclic aromatic hydrocarbons (PAHs) have received significant attention due to their potential health and environmental impacts. Some are toxic and pose risks to human health and ecosystems. This study was conducted to determine the levels of PAHs in Oreochromis niloticus from Ogun river in Ajegunle, South-West Nigeria. Gas Chromatography with Flame Ionization Detector (GC/FID) was used to measure the concentrations of PAHs in the fish tissues, following United State Environmental Protection Agency (USEPA) methods. The objectives of the research evaluated the toxic equivalency (TEQ) of PAHs, toxic/hazard
quotient for PAHs, estimated daily intake with annual intake and cancer risk factor for PAHs in O.niloticus. Naphthalene had a low value in the fish sample analyzed and could be related to the fish species inability to absorb it irrespective of its presence in the water and sediments. Total PAH concentrations found in the fish sample exceeded the acceptable limit set by the European Commission (2 µg/kg Fluroanthene and Benzo(a)pyrene) for fish considered safe for human consumption. The quota for PAHs
ranged from 0.037% for Naphthalene to 73.97% for Fluroanthene. The continual consumption of fish from the river by the inhabitants could lead to bioaccumulation with adverse health implications since PAHs are carcinogenic, mutagenic and teratogenic. Furthermore, the high concentrations and the persistent nature of PAHs make the fish that inhabit the river unfit for human consumption.
quotient for PAHs, estimated daily intake with annual intake and cancer risk factor for PAHs in O.niloticus. Naphthalene had a low value in the fish sample analyzed and could be related to the fish species inability to absorb it irrespective of its presence in the water and sediments. Total PAH concentrations found in the fish sample exceeded the acceptable limit set by the European Commission (2 µg/kg Fluroanthene and Benzo(a)pyrene) for fish considered safe for human consumption. The quota for PAHs
ranged from 0.037% for Naphthalene to 73.97% for Fluroanthene. The continual consumption of fish from the river by the inhabitants could lead to bioaccumulation with adverse health implications since PAHs are carcinogenic, mutagenic and teratogenic. Furthermore, the high concentrations and the persistent nature of PAHs make the fish that inhabit the river unfit for human consumption.
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