Determination of Oil Pollutions(Polycyclic aromatic hydrocarbons) Residuals in Water of Three International Wetlands (Alagol, Almagol and Agigol) in the North of Iran

Polycyclic aromatic hydrocarbons (PAHs) occur in the environment as complex mixtures resulting from natural and anthropogenic pyrolysis of organic matter during forest fires, fossil fuel utilization, and chemical manufacture. Several PAH have been classified as probable or possible human carcinogens. In general, it is considered that the most important ways of exposure to the PAH are from food and inhalation. Due to their ubiquity, the identification and quantification are of great importance, and therefore it is necessary to have at one’s disposal sufficiently sensitive methods. According to effects of these compounds on human this study for the first time is necessary in Iran. in this study sixteen Aromatic compound (respectively: Naphthalene, Acenaphthylene, Acenaphthene, Fluorene, Phenanthrene, Anthracene, Fluoranthene, Pyrene, Chrysene, Benz(a)anthracene, Benzo(k)fluoranthene, Benzo(b)fluoranthene, Benzo(a)pyrene, Indeno (1,2,3cd) pyrene, Dibenzo (a) anthracene and Benzo (g,h,i) perylene) determined and compaired. Water samples from 3 international wetlands (Alagol, Almago and Agigol), were taken monthly during one season (summer) from province Golestan in order to investigate PAHs pollutions in surface of water. In this survey after transferring samples to laboratory and processing, they were analyzed by GC-1000 (Dany model). Determination and revelation were done with flame ionization detector (FID) detector that is suitable for organic compounds with aromatic rings. Extraction method in this survey was solid-phase extraction (SPE). The results of this study indicated that the mean concentration of PAHs compounds during the summer in these wetlands were 0/112 μg/L which was the highest amount detected in Alagol and Almagol wetlands in July because of increasing consumption of fossil fuels in this area. Also Naphthalene and Benzo (b) fluoranthene compounds have maximum levels in Alagol and Agigol wetlands respectively. On the other hand, during summer the mean values of PAHs in comparison with the US EPA permissible levels for fresh waters were significantly less than the standards during this time zone.