Liu Jing-da, An Jun-Lin, Zhang Yu-Xin, Shi Yuan-Zhe, Lin Xu
Key Laboratory of Meterological Disaster, Ministry of Education, Joint International Research Laboratory of Climate and Environment Change, Collaborative Innovation Center on Forecast and Evaluation of Meterological Disasters, Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing 210044, China.
Hangzhou Environmental Monitoring Center, Hangzhou 310007, China.
Huan Jing Ke Xue. 2017 May 8;38(5):1733-1742. doi: 10.13227/j.hjkx.201610167.
Volatile organic compounds (VOCs) were determined by GC5000, an automatic on-line Gas Chromatography-Flame Ionization Detector. Elemental carbon (EC) and organic carbon (OC) were determined by the thermal/optical method using DRI-2001A during the periods of June 15-July 15 2015 and December 16 2015-January 15 2016. The concentration of secondary organic aerosol(SOA) was estimated by fractional aerosol coefficients (FAC) and EC tracer method. The source apportionment relied on the positive matrix factorization model (PMF). There were several conclusions:First, aromatic hydrocarbon was the main substance causing the SOA pollution in the Nanjing Industrial district, the contributions of aromatic hydrocarbon to SOA during summer and winter were 80.39% and 94.63%, respectively. The main contributers were benzene, toluene, ethylbenzene, -xylene and -xylene (BTEX). In the summer, SOA concentration ranged from 5.84-20.88 μg·m with an average of 12.15 μg·m and in the winter ranged from 2.17-17.73 μg·m in which the average concentration was 6.91 μg·m. Secondly, SOA concentration decreased when wind and precipitation increased. By using the PMF model, a total of 7sources of SOA were determined in summer and 6 were determined in winter. There were 3 main sources in summer, including painting, petroleum processing and petrochemical industry, and the contributions to SOA were 0.65 μg·m, 0.21 μg·m, 0.18 μg·m, respectively. In winter, the most important SOA pollution was from painting, in which the contribution was 0.94 μg·m.
