城市大气颗粒物中多环芳烃的源解析研究

目的]研究吉林市大气颗粒物(TSP)样品中多环芳烃(PAHs)分布状况。方法]对吉林市4个采样点2005年大气颗粒物中PAHs进行分析,分析检出的16种PAHs的浓度特征与污染状况,并采用因子分析与多元线性回归方法对大气颗粒物样品中PAHs进行源解析。结果]区域内16种PAHs浓度最小值为0.006 6 ng/m3,最大值为137.480 2 ng/m3,样品∑PAHs浓度范围为14.239 4～445.436 5 ng/m3,平均浓度为118.775 6 ng/m3,非采暖期样品平均∑PAHs大于采暖期;主要污染物来源为汽油及天然气燃烧与燃煤源,贡献率分别为77.85%、18.42%,其他源贡献率为3.73%。结论]该研究可为确定污染物来源、制定吉林市大气污染物防治规划提供理论依据。

Study of Source Apportionment of PAHs in Atmospheric Suspended Particles in City

Objective] The aim was to study PAHs distribution status of atmospheric suspended particles in Jilin City.Method] Levels of 16 PAH species in atmospheric total suspended particles of Jilin City at 4 sites during 2005 were determined.Source apportionment results of PAHs were obtained form the factor analysis and multiple linear regression.Result] The minimum and maximum of 16 PAHs was 0.006 6 and 137.480 2 ng/m3,respectively.The average summation of the 16 PAHs(∑PAHs) was 118.775 6 ng/m3,the range was 14.239 4-445.436 5 ng/m3.The average ∑PAHs of non-heating period was higher than that of heating period.PAHs mainly originated from gasoline and gas-related sources and the contribution rate was 77.85%,coal-related sources as a second source and the contribution rate was 18.42%,the other sources contribution rate was 3.73%.Conclusion] The study provides a theoretical basis for confirming the source of pollutant and draw up planning of atmospheric pollution control.