The Variations of Concentrations, Profiles and Possible Sources of Metals and Polycyclic Aromatic Hydrocarbons in PM10 from Lanzhou, China
Yunjiang Yu1,2, Qiong Wang2,3, Liangzhong Li1, Peng Sun4, Yanping Zhang2, Haipeng Lin5, Jianhua Chen2, Bigui Lin1, Mingdeng Xiang1
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1South China Institute of Environmental Science, MEP, Guangzhou 510535, China
2Chinese Research Academy of Environmental Sciences, Beijing 100012, China
3Institute of Environmental Health and Related Product Safety, China CDC, Beijing 100021, China
4State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing,
Beijing 100083, China
5China Institute for Radiation Protection, Taiyuan 030006, China
Submission date: 2015-12-02
Final revision date: 2016-01-18
Acceptance date: 2016-01-22
Publication date: 2016-05-25
Pol. J. Environ. Stud. 2016;25(3):1323-1330
Metals and polycyclic aromatic hydrocarbons (PAHs) are ubiquitous pollutants in airborne particulate matter. In order to better understand the concentrations and origins of metals and PAHs bound to particulate matter in Lanzhou city in northwest China, six metals (Cu, Zn, Ni, Pb, Cd, and Cr) and 16 selected PAHs in 108 particulate matter samples were quantified by inductively coupled plasma/mass spectrometry (ICP-MS) and gas chromatography/mass spectrometry. Results demonstrated that metals and PAHs in the ambient air of Lanzhou city showed regional and seasonal trends, and their concentrations were higher than those in several other Asian and European cities. The high molecular weight PAHs in winter were higher than in summer in both Xigu District and Yuzhong town. The principle components analysis (PCA) method was applied to analyze the sources of metals bound to particulate matters (PM2.5, PM10, TSP) and PAHs bound to PM10, and results showed that vehicle emissions, coal combustion, and oil combustion were probably the main sources of metal and PAHs in Lanzhou PM.
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