徐州市区不同季节大气TSP和PM10中PAHs污染特征及健康风险评估

于2009年2月-8月利用高效液相色谱法对徐州市区冬、春、夏3个季节大气TSP和PM10中16种多环芳烃进行分析,结果表明：大气TSP和PM10中∑PAHs不同季节分布规律均为：冬季〉春季〉夏季;冬季,荧蒽污染浓度最高;春季和夏季苯并（g,h,i）芘浓度最高;不同环数PAHs春季和年均值呈规律均为：6环〉4环〉5环〉3环〉2环;夏季为：6环〉5环〉4环〉3环〉2环;冬季为：4环〉5环〉6环〉3环〉2环;大气TSP中整体苯并（a）芘等效致癌毒性（BEQ）不同季节分布规律为：冬季（4.517ng/m3）〉夏季（1.602ng/m3）〉春季（1.413ng/m3）;PM10中整体BEQ不同季节分布规律为：冬季（3.706ng/m3）〉春季（1.504ng/m3）〉夏季（1.331ng/m3）;采暖期大气颗粒物中PAHs污染对人体健康危害风险相对较高。

Pollution Characteristics and Risk Assessment of Polycyclic Aromatic Hydrocarbons in TSP and PM_(10) in Xuzhou City

From February to August in 2009, the composition of 16 priority polycyclic aromatic hydrocarbons（PAHs） in TSPand PM10 in Xuzhou City were analyzed using HPLC technique. The results showed that during different seasons the pollution characteristics of ∑ PAHs in TSP and PM,o were winter 〉 spring 〉 summer, such as the coneentrati0n of fluoranthene was the highest in winter, the concentration of benzo （ g, h, i ） perylene was the highest in spring and summer. The concentration of PAHs with various rings was found to be in the order of 6 rings 〉 4 rings 〉 5 rings 〉 3 rings 〉2 tings, in spring and annual average; 6 rings 〉5 rings 〉4 rings 〉3 rings 〉2 rings in summer; 4 rings〉 5 rings 〉6 rings 〉 3 rings 〉 2 rings in spring. Total BEQ of TSP in different seasons was winter 〉 summer 〉 spring, and total BEQ of PM10 was winter 〉 spring 〉 summer. The pollution risk of PAHs in heating period was higher.