薪柴燃烧源和燃煤源中多环芳烃的成分谱研究

采集了薪柴燃烧源、燃煤源产生的PM10颗粒物样品,采用超声萃取、硅胶-氧化铝柱层析分离、气相色谱/质谱联用技术,对美国环保总局推荐的优控多环芳烃进行了定量分析。薪柴源、燃煤源产生的多环芳烃单体质量浓度分别在0.81～199.52、9.86～591.95ng/m3之间;对结果进行归一化处理,从而确定了薪柴源、燃煤源产生的多环芳烃成分谱。对比两种污染源发现,薪柴源产生的多环芳烃以荧蒽和芘为主,燃煤源以荧蒽、苯并苝的含量最高。薪柴源产生的多环芳烃中,4环芳烃含量非常高,归一化含量达到60%,其他环数芳烃的含量很低;燃煤源中,3、4环芳烃含量较高,5、6环芳烃次之,它们之间的差别不如薪柴源各环芳烃之间的差别大。

Study on fingerprints of PAHs from the combustion of bavin and coal

PM10 samples from the combustion ofbavin and Coal were extracted with ultrasonic agitation, and extracts were separated by Chromatographic column packed with silica gel and alumina, PAHs suggested by US EPA were quantified by GC-MS. The concentrations of individual PAHs from bavin combustion were 0.81 - 199.52 ng/m^3, Flua and Pyr were the highest. The concentrations of individual PAHs from Coal combustion were 9.86 -591.95 ng/m^3, Flua and BghiP were the highest. The fingerprints of PAHs were obtained by averaging the ratios of individual PAHs concentration to the mass of the PAHs. From the bavin combustion, the content of PAHs of 4 rings was high to 60%, and PAHs of other rings were very low. From the coal combustion, PAHs of 3 - 4 rings was the highest and 5 - 6 rings followed, and the difference between them was not obvious as bavin combustion.