期刊
ATMOSPHERIC RESEARCH
卷 252, 期 -, 页码 -出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.atmosres.2020.105443
关键词
PM2.5; Organic aerosols; PAHs; n-Alkanes; Source apportionment; Health risk
资金
- National Natural Science Foundation of China [41977185]
- Provincial Natural Science Foundation of Jiangsu [BK20180040]
- Funding of Jiangsu ''333 project'' research [BRA2020068]
- Funding of Jiangsu Innovation & Entrepreneurship Team
The study collected PM2.5 samples from three megacities in the Yangtze River Delta and analyzed their composition, finding that vehicle emissions, coal burning, and industrial emissions were the main sources of pollution. PAHs levels were found to pose potential health risks, and a combination of health risk modeling and PMF indicated that vehicular emissions and coal burning were the major sources contributing to cancer risk in the three cities.
Fine particulate matter samples (PM2.5) were collected from the three megacities of the Yangtze River Delta (i.e., Shanghai, Hangzhou, and Nanjing) during November 11 to December 6, 2016. Organic carbon (OC), elemental carbon (EC), and four types of non-polar organic compounds such as polycyclic aromatic hydrocarbons (PAHs), n-alkanes, hopanes and steranes were analyzed in the samples. The average PM2.5 mass concentrations were 47.0, 64.2 and 45.5 mu g m(-3) in Shanghai, Hangzhou and Nanjing, respectively. OC and EC concentrations were 4.47 and 0.78 mu g m(-3), 15.38 and 2.97 mu g m(-3), 10.35 and 2.06 mu g m(-3), respectively. n-Alkanes accounted for the largest abundance of the identified non-polar organic compounds, followed by PAHs, hopanes and steranes. The positive matrix factorization (PMF) analysis demonstrated that vehicular emissions, coal burning and industrial emissions were the most important sources. Vehicle exhaust was the major source of emissions in Shanghai (61.0%) and Hangzhou (45.3%), whereas coal combustion emissions was dominant (48.8%) in Nanjing. In addition, the estimated lifetime cancer risk (ILCR) values exposed to PAHs for adults (6.54 x 10(-5)) and children (7.32 x 10(-6)) suggested that PAHs levels in this region pose potential health risks. Combining the health risk model with PMF further concluded that vehicular emissions (49.0%) and coal burning (35.7%) were the two major sources that contribute to the ILCR values in these three cities.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据