PAHs in Chinese atmosphere Part I: Concentration, source and temperature dependence
PAHs in Chinese atmosphere Part I: Concentration, source and temperature dependence
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中国大气中的多环芳烃第一部分：浓度、来源和温度依赖性
DOI：
10.1016/j.atmosenv.2017.11.029
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发表时间：
2018-01-01
影响因子：
5
通讯作者：
Li, Yi-Fan
中科院分区：
文献类型：
--
作者：
Ma, Wan-Li;Liu, Li-Yan;Li, Yi-Fan
研究中国大气中多环芳烃（PAHs）的分布特征，对了解PAHs的大尺度大气传输具有区域和全球意义。2008年8月至2009年7月，在中国11个城市（6个北方城市和5个南方城市），每周采集500多个气相和颗粒相样品，分析了16种美国EPA优先监测的多环芳烃。北方城市和南方城市的平均浓度分别为239 +/- 329纳克/立方米和165 +/- 164纳克/立方米。北方城市和南方城市大气中多环芳烃的季节变化存在差异，这主要是由于冬季温度效应的差异造成的。主成分分析表明，燃煤和机动车尾气分别是我国北方和南方城市大气中多环芳烃的主要来源。大气中多环芳烃的温度依赖性也不同，这是由于温度对已识别源的影响不同所致。据我们所知，这是第一个全面的研究报告的浓度，季节变化，来源和温度依赖性的差异，在中国北方城市和南方城市的大气多环芳烃。
The study on atmospheric polycyclic aromatic hydrocarbons (PAHs) in China has regional and global significance to understand the large scale atmospheric transport of PAHs. In this study, 16 US EPA priority PAHs were analyzed in more than 500 pairs of gas and particle phases samples, which were collected on the same schedule on a weekly basis from August 2008 to July 2009 at 11 urban sites (6 northern cities and 5 southern cities) across China. The average concentration was 239 +/- 329 ng/m(3) and 165 +/- 164 ng/m(3) for the northern cities and the southern cities, respectively. Different seasonal variations of atmospheric PAHs were observed between northern cities and southern cities, which were mainly caused by the different temperature effects in winter. Identified by principal component analysis, coal combustion and vehicle exhaust were the major sources of atmospheric PAHs in northern and southern cities of China, respectively. The temperature dependences of atmospheric PAHs were also different, which were caused by the different influences of temperature on identified sources. To our knowledge, this is the first comprehensive study to report the difference with concentrations, seasonal variations, sources and temperature dependences of atmospheric PAHs between northern cities and southern cities in China.