Pollution level and source apportionment of atmospheric particles PM1 in downtown area of Chengdu
LIN Yu1,2, YE Zhi-xiang1,2, YANG Huai-jin1,2, ZHANG Ju1,2, ZHU Yu-meng3
1. College of Resources and Environment, Chengdu University of Information Technology, Chengdu 610225, China;
2. Air Environmental Modeling and Pollution Controlling Key Laboratory of Sichuan Higher Education Institutes, Chengdu 610225, China;
3. Sichuan academy of environmental sciences, Chengdu 610041, China
Membrane samples of atmospheric PM1 were collected and their chemical components were analyzed during typical months of each season in 2015 at Chengdu downtown area, to investigate the pollution characteristic caused by atmospheric PM1. Results showed that average mass concentration of the atmospheric PM1 at Chengdu downtown area during 2015 was 51.97μg/m3. Main backbone of the atmospheric PM1 was appeared as water soluble total ion (TWSI), which accounting for 44.56% of the total atmospheric PM1. An average NO3-/SO42-of 0.66 (<1) indicating a greater contribution of stationary sources in atmospheric PM1 pollution than that of mobile sources. A much faster conversion of sulfur than nitrogen was proved by the higher SOR of 0.34 (than NOR of 0.07). The weaker correlation of organic carbon (OC)/elemental carbon (EC) in summer (R2=0.66) than other seasons (R2=0.89), indicated that the sources of OC and EC in summer was widely, while in other seasons were fixed. Source analysis results showed that there were six kinds of main source of the atmospheric PM1 at Chengdu downtown area in 2015, which were secondary nitrates, secondary sulfates, vehicle exhaust and biomass combustion, coal dust, dust source, and metallurgy.
林瑜, 叶芝祥, 杨怀金, 张菊, 朱羽蒙. 成都市中心城区大气PM1的污染特征及来源解析[J]. 中国环境科学, 2017, 37(9): 3220-3226.
LIN Yu, YE Zhi-xiang, YANG Huai-jin, ZHANG Ju, ZHU Yu-meng. Pollution level and source apportionment of atmospheric particles PM1 in downtown area of Chengdu. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(9): 3220-3226.
Seinfeld J H, Pandis S N. Atmosphere Chemistry and Physics——from Air Pollution to Climate Change[M]. New York:John Wiley & Sons, 1998:256-278.
Ando M, Katagiri K, Tamura K, et al. Indoor and outdoor air pollution in Tokyo and Beijing supercities[J]. Atmospheric Environment, 1996,30(5):695-702.
James A C, Stahlhofen W, Rudolf G, et al. The Respiratory Tract Deposition Model Proposed by the ICRP Task Group[J]. Radiation Protection Dosimetry, 1991,38(1-3):159-165.
Seaton A, MacNee W, Donaldson K, et al. Particulate air pollution and acute health effects[J]. Lancet, 1995,345(8943):176-178.
Sun Y L, Jiang Q, Wang Z F, et al. Investigation of the sources and evolution processes of severe haze pollution in Beijing in January 2013[J]. Journal of Geophysical Research:Atmospheres, 2014,119(7):4380-4398.
Sun Y L, Wang Z F, Fu P Q, et al. Aerosol composition, sources and processes during wintertime in Beijing, China[J]. Atmospheric Chemistry and Physics, 2013,13(9):4577-4592.
Huang X F, He L Y, Hu M, et al. Characterization of submicron aerosols at a rural site in Pearl River Delta of China using an Aerodyne High-Resolution Aerosol Mass Spectrometer[J]. Atmospheric Chemistry and Physics, 2011,11(5):1865-1877.
Zhang Q, Jimenez J L, Canagaratna M R, et al. Ubiquity and dominance of oxygenated species in organic aerosols in anthropogenically-influenced Northern Hemisphere midlatitudes[J]. Geophysical Research Letters, 2007,34(13):.
Turpin B J, Huntzcker J J. Identification of secondary organic aerosol episodes and quantization of primary and secondary organic aerosol concentrations during SCAQS[J]. Atmospheric Environment, 1995,29(23):3527-3544.