【摘要】 逐月采集南京市大气中不同粒径的颗粒物,采用HPLC分析了2010年每个月PM₁₀和PM_2.5颗粒物样品中的多环芳烃（PAHs）的种类和浓度水平。结果表明:PM₁₀中PAHs年均值为25.07 ng/m³,范围为11.03⁵3.56 ng/m3;PM_2.5中PAHs年均值为19.04 ng/m³,范围为10.82³6.43 ng/m³。PM₁₀和PM_2.5中PAHs总体浓度有着相似的变化趋势,呈现凹形变化曲线;在南京市大气颗粒物中吸附的PAHs大部分以5⁶环的高环数组分为主,大部分PAHs和∑PAHs的相关性较好,年度变化幅度不大,分析结果表明,颗粒物中PAHs的来源与稳定的排放源相关,机动车排放不容忽视,与北方城市燃煤污染有着较大的区别。更多还原

【Abstract】 PM₁₀ and PM_2.5samples were collected in Nanjing between January 2010 and December 2010. 16 EPA priority PAHs were extracted by microwave extraction mothed and were quantified using HPLC. The results showed that the year average concentrations of PAHs in PM₁₀ and PM_2.5were 25. 07 ng / m³ and 19. 04 ng / m³ respectively,the concentrations ranged from11. 03 ng / m³ to 53. 56 ng / m³ in PM₁₀samples,10. 82 ng / m³ to 36. 43 ng / m³ in PM_2.5samples respectively. The variation of PAHs concentrations in PM₁₀ and PM_2.5was similar. The highest concentration of PAHs in PM₁₀ was observed in winter,with the lowest level in summer. 5-6 rings of PAHs were the abundant compounds in PM₁₀ and PM_2.5,and the percent of these PAHs in winter and in summer closed. The diagnostic ratios suggested vehicle emission was the predominant sources for particulate PAHs in Nanjing. The characteristics of atmospheric PAHs pollution in Nanjing and the northern city was difference.更多还原