Dietary intake of polycyclic aromatic hydrocarbons (PAHs) from coral reef fish in the Persian Gulf - Human health risk assessment

The present study investigated accumulation of petrogenic polycyclic aromatic hydrocarbons (Sigma(39)PAHs) in the livers and muscles of three coral-reef fish (50 specimens) from the Persian Gulf, Kharg Island (Iran), specifically Lethrinus microdon (n = 18), Lutjanus argentimaculatus (n = 17), and Scomberomorus guttatus (n = 15). For all fish, PAHs originated mostly from petroleum and combustion sources. Concentrations of Sigma(39)PAHs were 1004 ngg(-1) freeze-dried weight (fdw) and 1390 ngg(-1) fdw for liver and muscle, respectively. The biota-sediment accumulation factor of 20,181 and equivalent concentrations of Sigma AHs (liver) were highest for L. argentimaculatus. Most of the abundant PAHs identified were low molecular weight (LMW-PAH) (liver > muscle) with 2-3 aromatic ring. Results for the human health risk assessment concluded the probability of PAHs intake via fish consumption was considerable in this area (lifetime cancer risk (ILCR) > 1 x 10(-5); hazard quotients (HQ(s)) > 1; hazard index (HI) approximate to 6; the excess cancer risk (ECR) > 1 x 10(-6)) and, therefore, comprehensive management and long-term monitoring is needed.