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Distribution characteristics of chemical components in aerosol during haze days in north suburban Nanjing |
ZHANG Cheng1, YU Xing-na1, AN Jun-lin1, LI Yan1, ZHAO Rui-dong1, ZHAO Bo2, XIAO Wei-sheng2 |
1. Key Laboratory of Meteorological Disaster, Ministry of Education, Joint International Research Laboratory of Climate and Environment Change, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing 210044, China;
2. Guangdong Emergency Early Warning Release Center, Guangzhou 510080, China |
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Abstract Particles were collected during winter and spring by ray β dust instrument, Andersen cascade sampler and analyzed by ion chromatography and carbon analyzer. The results showed that the proportion of SO42-、NO3-and NH4+ in fine particles was the highest (77.4%) during hazy days. The spectral of most ions for hazy days showed trimodal distributions. The industrial emission, biomass burning and secondary reaction were the most important pollution sources of ions. OC and EC were enriched in fine particles. A good relation (R2=0.76) between OC and EC suggested that the same source in PM2.1~10. Ratios of OC and EC indicated that the main sources of carbonaceous particles were vehicle exhaust, coal combustion and biomass burning during hazy days.
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Received: 14 January 2018
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