Determination of Phenanthrene in Urban Runoff of Tehran, Capital of Iran

In many big cities, surface runoff is collected by separate collection system and is then directed toreceiving water bodies. since it washes out the materials from the surface of different lands, is knownas the source of pollution. polycyclic aromatic hydrocarbons (pahs) are one class of carcinogeniccontaminants that are commonly found in storm water runoff. in this study, phenanthrene wasmeasured in the surface runoff of south of tehran, capital of iran. after identifying three maindrainage channels, three sampling stations were chosen, based of the fact that all urban surface runoffscompletely passed through these points and taken samples were more expected as representative of allkinds of pollutants. surface runoff flows in three main channels from north to south of tehran. at eachmonth two samples were taken from each station, afterwards concerning the usepa method, 60samples were extracted and analyzed with high performance liquid chromatography device. resultsshow that the average concentration of pah in the most polluted drainage was about 9.4 mu g/l. theminimum and the maximum concentrations of pah in all of the taken samples were zero and, 15.1mu g/l, respectively. in the rainy season, the concentration of phenanthrene was the highest, because therain washed out the pollutant from the surface of the street. in addition, the concentration ofphenanthrene in the middle drainage channel was more than two others, because this station receivedthe runoff from city center whose traffic load was high.