摘要
利用PUF被动采样器于2008年8月—2009年7月采集了西安大气样品,研究了大气气相中多环芳烃（PAHs）的含量和季节分布特征。结果表明,西安大气气相中16种美国EPA优控的PAHs（Σ16PAHs）质量浓度为10.9-489.6 ng/m3（平均为143.4 ng/m3）,四季具有明显的季节差异,依次为夏季（62.5 ng/m3）〈春季（80.1 ng/m3）〈秋季（175.8 ng/m3）〈冬季（255.2 ng/m3）。气相中PAHs主要以3-4环为主,占总量的86.5%-94.1%。利用主成分分析法判断四季气相中PAHs的污染来源类型,主要为燃煤和机动车尾气及生物质燃烧的复合源。
Based on the atmospheric samples in Xi＇an collected from August 2008 to July 2009 by polyurethane foam passive air samplers（PUF PAS）,the seasonal variation of the polycyclic aromatic hydrocarbons（PAHs） in gaseous phase were studied in this study.Results showed that the concentration of 16 U.S.EPA priority PAHs（∑ 16 PAHs）in gaseous phase of Xi＇an city ranged from 10.9 to 489.6 ng / m3（with an average concentration of 143.4 ng / m3）,and the seasonal differences are obvious in four seasons,followed by summer（62.5 ng / m3） spring（80.1 ng/m3） autumn（175.8 ng/m3） winter（255.2 ng/m3）.The PAHs in the gaseous phase are mainly 3 - 4 rings,which accounted for 86.5% - 94.1% comparing to total concentrations.Soures of PAHs in Xi＇an atmosphere were investigated by principal component analysis（PCA）,which revealed that coal burning,motor vehicle exhaust and biomass burnings were the major sources for Xi＇an city.
出处
《环境工程学报》
CAS
CSCD
北大核心
2013年第9期3511-3516,共6页
Chinese Journal of Environmental Engineering
基金
陕西省自然科学基金资助项目(2007D20)
黄土与第四纪地质国家重点实验室开放基金项目(SKLLQG1204)
宝鸡文理学院院级重点项目(ZK0797)
宝鸡文理学院博士启动项目
关键词
多环芳烃
气相
来源解析
主成分分析
PAHs
gaseous phase
assessment of pollution sources
principal component analysis
