【摘要】 2012年4月在重庆市4个不同功能区连续10 d同步采集了大气PM10环境样品,利用气相色谱-质谱法分析测定美国环保局16种优控多环芳烃(PAHs)。结果显示,在重庆主城区PM10中检测到16种优控PAHs,总浓度(∑PAHs)范围为31.68～189.31 ng/m3,平均浓度为108.05 ng/m3。各个功能区大气PM10中PAHs总浓度存在明显差别:交通区(沙坪坝七中)154.47 ng/m3>工业区(大渡口区政府)132.92 ng/m3>居民区(南岸工商大学)105.58 ng/m3>对照区(缙云山风景区)39.16 ng/m3。根据典型污染来源中PAHs的特征比值综合判断,重庆市春季大气中PM10主要来源于燃煤和交通污染的混合源。更多还原

【Abstract】 The inhalable particulates(PM10) samples of 4 different functional areas were collected in April 2012 for 10 days at Chongqing.GC-MS was used to determine 16 polycyclic aromatic hydrocarbons(PAHs) which EPA control preferentially.The results showed that the total concentration range of PAHs was 31.68-189.31 ng/m3,and average concentration was 108.05 ng/m3 in spring.The significant difference in the average value of ∑ PAHs during the sampling time as follows: Shapingba at 154.47 ng/m3,Dadukou at 132.92 ng/m3,Nanan at 105.58 ng/m3,Jinyunshan at 39.16 ng/m3.Characteristic ratios of several PAHs showed that coal burning and vehicle emission were the major sources of PM10 in Chongqing.更多还原