Mehdi Mohammadi

Polycyclic aromatic hydrocarbons (PAHs) are pollutants that are of great concern for the stability and resilience of marine ecosystems, and for their long-term effects on marine organisms. In this study, the concentration and origin of 14 compounds of pahs in seawater, sediments and rock oyster saccostrea cucullata in the coasts of Bushehr province were investigated during two seasons. . Samples of seawater, sediment and oysters were collected from 4 stations of Genaveh, Bushehr, Deir and Nayband and transferred on ice to the laboratory of the Persian Gulf Studies and Research Center and kept at -20 ° C until analysis. The results showed that the concentration of pahs in water samples in the inter-tropical regions of Bushehr province is very low compared to other regions of the Persian Gulf and other parts of the world. Among the studied stations, the highest concentration of pahs was observed in sediments and shells of Genaveh and Bushehr stations. The results of the study showed that the source of input of pahs compounds in the coastal waters of Bushehr province is of both petroleum (petrogenic) and fuel (pyrolytic) sources with a predominance of petroleum compounds. A direct and significant relationship between the total concentration of pahs compounds between sediment and oysters, along with the ability of these oysters to accumulate pahs showed that this species is suitable for biological monitoring of pahs compounds in these areas.