【摘要】 采集并分析了天津不同区县 1 3个样点冬季总悬浮颗粒物 (TSP)中 1 6种优控多环芳烃 (PAHs)含量 .结果表明不同样品间PAHs含量差异明显 ,东部开发区和中北部区县含量明显高于其它地区 ,大港油田的颗粒物中PAHs含量很低 ,市区、南部区县和北部山区居中 .根据毒性等效因子计算了等效浓度 ,不同样品PAHs总等效浓度差异不大 ,占总浓度 5 0 %的高环PAHs毒性贡献达 90 % .更多还原

【Abstract】 Total suspended particles (TSP) samples from 13 stations in Tianjin were collected and analyzed for polycyclic aromatic hydrocarbons (PAHs) during 2002 winter. There was significant difference in total PAH concentration among 13 samples. TSP samples from the east Economic Development Area and mid north districts had the highest contents of PAHs, while Dagang Oil Field had the lowest PAH content. The urban area, south district, and Jixian county had the moderate contents of PAHs. Based on the measured concentration of the PAHs, BaP equivalent (BaPeq) were derived based on Toxicity Equivalent Factors (TEFs) of the PAHs. The total BaPeq values were similar among the samples. The contribution of PAHs with five or six rings contributed 90% of the total toxicity, while they accounted for only 50% of the total concentration.更多还原