Distribution Characteristics And Source Of Polycyclic Aromatic Hydrocarbons In Various Functional Areas Of Shanghai

Polycyclic Aromatic Hydrocarbons (PAHs)have gained utmost attention as contaminants of potential threat to Environment and human health. In order to get a general idea of the distribution and transformation of PAHs in multimedia in various functional areas of shanghai, PAHs were analyzed according to the USEPA method 8100 series with a strict QA/QC measurement, utilizing HPLC. And the study results will provide scientific bases for urban environmental protection and management in Shanghai. The main conclusions are summarized as follows:The average concentration of PAHs in the soil in various functional areas were in industrial park>business and traffic zone>residence and campus zone>tour zone and the average concentration were 3257 ng/g in Coking & Chemical factory,1873 ng/g in Chlor-Alkali Chemical factory, 993 ng/g in Power Plant,196 ng/g in Nanjing Road,166 ng/g in Xu Jiahui,89 ng/g in Min Hang,111 ng/g Qi Bao and 10 ng/g in Dian Shan Lake.3-4 rings compounds were dominant and distributed asymmetry.The distance to the source,the characteristic of functional areas and soil were affecting the distribution of PAHs in soil. The predominant source were coal combustion.The predominant PAHs in the air were 3-4 rings compounds in vapor phase with a range of 410-629 ng/daybut 4-6 rings compounds in particulate phase with a range of 58-79ng/m~3. The gas phase PAHs concentration in summer are higher than in winter and adversely for the particulate phase PAHs .The leaves of camphor can be used as the bio-referent of PAHs.The predominant source were vehicle emissions and coal combustion.Meteorological parameters especially wind speed and temperature are influence factors.There was a close relationship between PAHs concentration and GDP.Coking & Chemical factory was polluted heavily through the study of the distribution of PAHs in 3 environmental mediums in the industrial park and there was a close correlation between PAHs concentration in Coking & Chemical factory and Chlor-Alkali Chemical factory,so as the PAHs concentration in the 3 mediums.