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- W2182520488 abstract "The uptake as critical body residue (CBR), bioconcentration factor (BCF) and the depuration of polycyclic aromatic hydrocarbons (PAHs) from the tissues of Oreochromis niloticus exposed to the PAHs in water accommodated fractions of the dispersed mixture (DCOWAF-PAH) using Goldcrew SW dispersant and undispersed mixture (COWAF-PAH) of Bonny Light crude oil was studied comparatively. Analysis of the Bonny Light crude oil, Goldcrew SW dispersant, water (test medium), Coppen fish feed administered and pre-exposed fish tissues showed the total concentration of PAHs to be 1916.40, not detected (ND), ND, 0.573and 0.0073 µg/g respectively. After a 50-day exposure, the fish tissues from the different mixtures (DCOWAF-PAH and COWAF-PAH) at the different concentrations showed the uptake of PAHs as CBR at various concentrations and the presence of the PAHs in the test medium. The results for the CBR as the total concentration of the PAHs in the fish tissues from the different concentrations of DCOWAF-PAH and COWAF-PAH ranged from 3.6128 - 7.9744 µg/g and 3.4114 - 3.9623µg/g respectively and were higher in tissues from the DCOWAF-PAH than those from COWAF-PAH but varied for the individual PAHs based on their molecular weights. The concentrations of PAH in the medium ranged from 0.0958 – 0.1552 µgL -1 in the DCOWAF-PAH and 0.0577 - 0.0869 µgL -1 in the COWAF-PAH. The BCF values of total PAHs in the fish tissues from the different concentrations of DCOWAF-PAH ranged from 25.8057 – 83.2401and were higher than those from the COWAF-PAH that ranged from 41.6532-68.7920. The BCF values varied for the individual PAHs influenced by their molecular weights. The depuration rates from the fish tissues were independent of exposure concentration and ranged from 1.29-3.98% d -1 and 1.44-3.95%d -1 during a of fourteen days period for the DCOWAF-PAH and COWAF-PAH mixtures respectively. The depuration rates varied for the individual PAHs and reduced with time. The presence of the dispersant triggered increase in the CBR of the PAHs present within the fish tissues and water when compared with those from the mixture without the dispersant at the same concentration, increased the BCF hence, the bioaccumulation and persistence of low and high molecular weights PAHs and triggered increased rates of depuration of the PAHs from the exposed fish tissues." @default.
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- W2182520488 title "UPTAKE AND DEPURATION OF PAHS BY OREOCHROMIS NILOTICUS EXPOSED TO THE DISPERSED PHASE OF BONNY LIGHT CRUDE OIL" @default.
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