Analysis Of Aerosol Pollution Characteristics,Source Apportionment And Meteorological Factor In Nanjing Northern Suburb

To understand the chemical composition and source of aerosol in Nanjing, this research is about aerosol sampling and analysis from 2013 to 2015 in the Northern suburb of Nanjing. This research used the Anderson and middle flow rate of aerosol sampling, ion chromatograph and heat/light carbon analyzer, gas monitor and β rays monitor, while this research was connected with the backward trajectory, ground meteorological elements for observation and analysis. We want to offer help for researching formation of aerosol and pollution control in Nanjing.This research shows that during May 2013 to April 2014, spring, summer and autumn was affect by the east maritime air mass, winter was mainly affected by local air mass in the Northern suburb of Nanjing. In the spring, the secondary aerosols accounted for 33.6%. Summer, autumn was mainly affected by the Marine source. The biomass combustion accounted for 35.2% in winter. In PM2.5, NH4+, SO42-, NO3-annual average increase 43.6%,65.6%,72.2% in haze days; In PM2.5-10,17.5%,43.6% and 35.2% respectively. In October 2014 to July 2015, TC was:winter> spring> autumn> summer; the SOC was winter> autumn> spring> summer; the POC was: winter> spring> autumn> summer.In 10-28, August 2013(Nanjing Asian Youth Games), PM2.5, NO2, O3 and CO, respectively was reduced by 26.0%,42.6%,36.1% and 46.1% than early NAYG. The main composition was Na+, NH4+, Ca2+, NO3-, SO42- in NAYG’s PM2.5; Na+, NH4+, Ca2+, Cl-, NO3-, SO42- in NAYG’s PM2.5-10. Most of the ions present three peak spectrum distribution. SO2 and NOx mainly came from the mobile sources in early and late NAYG, during the NAYG was stationary sources. In NAYG and late, EC and OC has good homogeneity, and concentration was reduced obviously.