摘要
采用稀释通道采样系统对北京市部分污染源排放的PM_(2.5)进行了采集,用气相色谱-质谱-质谱法分析了PM_(2.5)中24种多环芳烃(PAHs)的浓度,获得典型排放源PM_(2.5)中PAHs成分谱。结果表明,不同种类污染源排放的PAHs的组分浓度差异比较大,形成的百分浓度轮廓图有各自的特征。生物质燃烧和化石燃烧排放的PM_(2.5)中PAHs含量高于其他污染源;燃煤电厂和供暖/工业锅炉排放的PM_(2.5)中低环数的PAHs比例较高,而生物质燃烧和餐饮源则是高环数的污染物比例较高。燃烧温度高,燃烧较充分,采用布袋除尘方式的污染源排放的PAHs含量要低于其他污染源。
The dilution sampling method was used to collect PM_（2.5）samples near stationary pollution sources in Beijing,which were then analyzed for 24 types of polycyclic aromatic hydrocarbons（ PAHs）,using gas chromatography in tandem with mass spectrometry（ GC-MS-MS）. In this study,the source fingerprints of typical sources were obtained by averaging the ratios of individual PAH concentrations to the mass of the 24 PAHs measured. We found that the concentrations of PAHs were significantly different from different types of sources. In particular,biomass and fossil fuel combustion released more PAHs than other sources. Coal-fired power plants and heating / industrial boilers released more low-ring PAHs,while biomass burning and catering sources released more high-ring PAHs. Higher combustion temperatures and more thorough burning would help to significantly reduce PAH emissions.
出处
《环境工程学报》
CAS
CSCD
北大核心
2016年第6期3141-3146,共6页
Chinese Journal of Environmental Engineering
基金
北京市科技计划项目(Z121100000312035)
