首页 | 本学科首页   官方微博 | 高级检索  
     检索      

北京PM2.5中多环芳烃的污染特征及来源研究
引用本文:段凤魁,贺克斌,马永亮.北京PM2.5中多环芳烃的污染特征及来源研究[J].环境科学学报,2009,29(7):1363-1371.
作者姓名:段凤魁  贺克斌  马永亮
作者单位:清华大学环境科学与工程系,北京,100084
基金项目:国家杰出青年科学基金,高等学校全国优秀博士学位论文作者专项基金 
摘    要:采用GC/MS定量分析了2003年9月至2004年7月期间北京市PM2.5中16种优控PAHs的含量.研究表明.PAHs总浓度年均值139.59ng·m-3,变化范围1.02-776.4 ng·m-3.冬季浓度最高271.05 ng·m-3,夏季最低26.10 ng·m-3,反映了主要源排放(燃煤)变化与气象条件的共同影响.全年平均不同环数PAHs所占总浓度的比例由大到小:4环>5环>6环>3环>2环;冬季4环PAHs所占比例最大(48.7%),其次为5环(32.5%)和6环PAHs(14.9%);夏季5环、6环PAHs所占比例最高(36.5%),其次为4环PAHs(24.1%).源排放特征化合物比值法和主成分分析法结果都表明,燃煤、机动车和油类挥发是多环芳烃的3类主要污染源,能够解释主成分分析法总方差的88%.

关 键 词:季节变化  气象条件  主成分分析
收稿时间:2008/10/14 0:00:00
修稿时间:5/7/2009 12:00:00 AM

Concentration and sources of atmospheric polycyclic aromatic hydrocarbons(PAHs) in PM2.5 in Beijing
DUAN Fengkui,HE Kebin and MA Yongliang.Concentration and sources of atmospheric polycyclic aromatic hydrocarbons(PAHs) in PM2.5 in Beijing[J].Acta Scientiae Circumstantiae,2009,29(7):1363-1371.
Authors:DUAN Fengkui  HE Kebin and MA Yongliang
Institution:Department of Environmental Science and Environment, Tsinghua University, Beijing 100084,Department of Environmental Science and Environment, Tsinghua University, Beijing 100084 and Department of Environmental Science and Environment, Tsinghua University, Beijing 100084
Abstract:Sixteen polycyclic aromatic hydrocarbons (PAHs) were determined by GC/MS in PM2.5 samples taken from September 2003 to July 2004 in Beijing. The annual average concentration of the total PAHs was 139.59 ng·m-3, ranging from 1.02 ng·m-3 to 776.4 ng·m-3 and showed strong seasonal variation, that is, the highest value in winter (271.05 ng·m-3) and the lowest in summer (26.10 ng·m-3). These results indicate the influence of both main source emission and meteorological conditions. Over the whole year, the average amounts of the different ring PAHs appeared in the following order: 4-ring > 5-ring > 6-ring >3-ring > 2-ring. In winter, the percentage of 4-ring PAHs was the highest (48.7%), followed by 5-ring PAHs (32.5%) and 6-ring PAHs (14.9%); in summer, the percentage of 5-ring and 6-ring PAHs (36.5%, together) were higher than 4-ring PAHs (24.1%). Results from both the characteristic ratios of sources and principal component analysis (PCA) indicated that coal burning, gasoline and diesel vehicle emissions were the three main sources of PAHs in PM2.5 in Beijing. These three sources can explain 88% of the total variance.
Keywords:PM2  5  PAHs
本文献已被 万方数据 等数据库收录!
点击此处可从《环境科学学报》浏览原始摘要信息
点击此处可从《环境科学学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号