A seasonal study of polycyclic aromatic hydrocarbons in PM2.5 and PM2.5-10 in five typical cities of Liaoning Province, China
A seasonal study of polycyclic aromatic hydrocarbons in PM2.5 and PM2.5-10 in five typical cities of Liaoning Province, China
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DOI：
10.1016/j.jhazmat.2010.06.107
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发表时间：
2010-11-15
影响因子：
13.6
通讯作者：
Li, Zhiyong
中科院分区：
文献类型：
--
作者：
Kong, Shaofei;Ding, Xiao;Li, Zhiyong
采用高效液相色谱法，对2004年和2005年辽宁省沈阳、鞍山、锦州、抚顺和大连5个城市PM2.5和PM2.5-10中14种多环芳烃（PAHs）进行了分析。结果表明，PM2.5和PM2.5-10中多环芳烃总浓度分别为75.32-1900.89 ng m（-3）和16.74-303.24 ng m（-3）。PM2.5中的PAHs占总PAHs的90%。PM2.5中多环芳烃的冬季和夏季的比例在6.5到125.8之间，而PM2.5-10中多环芳烃的比例在1.7到37.6之间。总的多环芳烃浓度最丰富的住宅/商业网站和最少的工业现场的PM2.5和PM2.5-10。城市背景的网站显示出意想不到的高多环芳烃浓度。不同功能区的PM2.5总BaP当量浓度（BaPeq）范围为7.80至88.42 ng m（-3）。用分歧系数比较了不同采样点和粗细粒级间的多环芳烃谱的相似性，结果表明，多环芳烃组成存在显著差异。主成分分析（PCA）与诊断比显示，燃煤和机动车排放的PM2.5和PM2.5-10相关的多环芳烃的主要来源。(C)2010 Elsevier B. V.保留所有权利。
Fourteen polycyclic aromatic hydrocarbons (PAHs) in PM2.5 and PM2.5-10 samples collected in five cities (Shenyang, Anshan, Jinzhou, Fushun and Dalian), Liaoning Province, China in 2004 and 2005 were analyzed by using a HPLC equipped with fluorescence and UV detectors. Results showed total PAHs concentrations in PM2.5 and PM2.5-10 were in the range of 75.32-1900.89 ng m(-3) and 16.74-303.24 ng m(-3), respectively. 90% of the total PAHs were in PM2.5. PAHs in PM2.5 had a winter to summer ratio varying from 6.5 to 125.8 while PAHs in PM2.5-10 had a ratio ranging from 1.7 to 37.6. Total PAHs concentrations were most abundant at residential/commercial sites and were fewest at an industrial site for both PM2.5 and PM2.5-10. Urban background sites showed unexpected higher PAHs concentrations. Total BaP equivalent concentration (BaPeq) for PM2.5 ranged from 7.80 to 88.42 ng m(-3) in different function zones. Similarities of PAHs profiles between sampling sites and between fine and coarse fractions were compared by coefficient of divergence which indicated that remarkable differences in PAHs compositions existed. Principal component analysis (PCA) associated with diagnostic ratios revealed coal combustion and vehicle emission were the major sources for PM2.5 and PM2.5-10 associated PAHs. (C) 2010 Elsevier B.V. All rights reserved.