Publisher: Chemical Society of Nigeria

Polycyclic Aromatic Hydrocarbons In Soils Within Calabar Metropolis

K. A. Ibe, T. N. Nganje, A. E. Edet
KEYWORDS: Polycyclic aromatic hydrocarbon, petroleum handling facility, vehicular traffic, accelerated solvent extraction, potency equivalent


Twenty two soil samples from Calabar metropolis were analyzed for total organic carbon and polycyclic aromatic hydrocarbons; using the Blackey and Walkey titration method, gas chromatography and gas chromatography- mass spectrometry. The total organic carbon (TOC) values of the soils of Calabar Metropolis ranged from 0.34 to 6.21% with a mean value of 4.05±3.80%. The concentrations of the polycyclic aromatic hydrocarbon for Calabar Metropolis soils ranged from 1.8 to 334.43μgg-1 with a mean concentration of 50.31± 81.09μgg-1. The PAH diagnostic ratio used, showed a predominance of petroleum and liquid fossil fuel input in the soil PAHs. The setting had more exogenous than endogenous input .The soil Benzo(a)pyrene total potency equivalent, suggests a potential human health impact.

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