首页 | 本学科首页   官方微博 | 高级检索  
     


Identification of concentrations and sources of PM2.5-bound PAHs in North China during haze episodes in 2013
Authors:Wei Lu  Lingxiao Yang  Jianmin Chen  Xinfeng Wang  Hao Li  Yanhong Zhu  Liang Wen  Caihong Xu  Junmei Zhang  Tong Zhu  Wenxing Wang
Affiliation:1.Environment Research Institute,Shandong University,Jinan,China;2.School of Environmental Science and Engineering,Shandong University,Jinan,China;3.Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Fudan Tyndall Centre, Department of Environmental Science and Engineering,Fudan University,Shanghai,China;4.State Key Lab for Environment Simulation and Pollution Control, College of Environmental Sciences and Engineering,Peking University,Beijing,China;5.Henan Institute of Engineering,Zhengzhou,China
Abstract:An analysis of 12 polycyclic aromatic hydrocarbons (PAHs) in PM2.5 (particulate matter with a diameter smaller than 2.5 microns) samples collected at Yucheng, Shandong, in June 2013 was conducted to determine the concentrations, composition, sources, and associated cancer risk. The results revealed that the average PAH concentration was higher during haze episodes (28.28?±?8.35 ng m?3) when compared to non-haze episodes (23.68?±?4.17 ng m?3), and diagnostic ratio and principal component analyses indicate that the predominant sources of PAHs were from fossil fuel and coal combustion, likely from vehicle emissions and industrial sources and biomass burning. Coal combustion and biomass burning contributed significantly more during haze episodes, whereas liquid fossil fuel combustion (e.g. petroleum) was the dominant contributor during the non-haze periods. In addition, back-trajectory calculations revealed that the long-distance transport of air masses from regions with industrial pollution and biomass burning contributed significantly to the concentrations of PAHs in the region. The concentration of high molecular weight PAHs (HMW-PAHs) increased from 62.3 % under non-haze conditions to 67.9 % during the haze periods. The benzo[a]pyrene-equivalent carcinogenic potency value during haze episodes was higher (7.09 ng m?3) than that during non-haze (5.64 ng m?3) periods and adults over 30 years old in the Shandong province are at an increased risk of cancer from PAHs.
Keywords:
本文献已被 SpringerLink 等数据库收录!
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