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Polycyclic aromatic hydrocarbon in rain and street runoff in Amman, Jordan

Journal of Environmental Sciences 2003年第6期15卷 848-853页

作者： anwar. g. jiries Helmi. H. Hussein Jutta Lintelmann Mutah University Water and Environment Research CenterDepartment of Chemistry Ottawa UniversityGSF National Research Center for Environment and Health-D 85764 Karak Jordan. 10 Marie Curie Ottawa Ontario K1N 6N5 CanadaNeuherbergGermany

Concentrations of polycyclic aromatic hydrocarbons(PAHs) were determined in the rain and street runoff samples from two sites in the vicinity of Amman City during.the pluvial period 1999—2000. The results showed that elevated levels of PAHs were detected in the city center(site 1) than the residential area(site 2) and that the levels were hig.er in street runoff than rain samples of the same sites. The hig.est concentration of PAHs in both street runoff and rain samples were observed in the first rainy month(November 1999) which indicated a wash out effect of PAHs orig.nating.from vehicular emission accumulated during.the long.dry summer season before sampling. Within the investig.ted cold winter seasons, fluctuations in PAHs concentration were observed. The variation was attributed to the fossil combustion for heating.purposes and to intervals between rainfalls: as the long.r the intervals between rains were, the hig.er the PAH concentration were. Removal of PAHs from the atmosphere throug. precipitation over the investig.ted period varied with time and places depending.on the amount of rainfall where hig.er rainfall removed hig.er amount of PAHs from the atmosphere. The amount of PAHs washed out throug. precipitation was estimated to be around 14.8 mg.m 2 and 21.1 mg.m 2 for sites 1 and 2 respectively.

关键词： PAHs rain street runoff Jordan

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