Investigation On The Secondary Pollution Characteristics Of Atmospheric Fine Particles During Haze Period In Jinan

In this thesis, air fine particles of air pollution characteristics were studied in Jinan city, China. Daily PM10/PM2.5 samples were collected simultaneously at an urban site (QG) and a rural site (SJ) from January 20,2014 to March 15,2014. Eight water-soluble inorganic ions (Cl-\NO3-, SO42-, Na+, NH4+, K+, Mg2+, Ca2+) of PM10/PM2.5 were analyzed using ion chromatography (IC; Dionex ICS-90, USA). And the carbon contents were determined using RT-4 type OC/EC analyzer (SUNSET, USA). Analyzed the composition and correlation of the fine particles in the atmospheric haze period in Jinan city. The main conclusions are as follows:(1) Jinan City, atmospheric fine particle pollution in serious condition, which is particularly serious during the haze, especially in the urban area. And PM2.5 had a higher levels of contamination.(2) The atmospheric fine particles of Jinan City, the dominant water-soluble ions were NO3-, SO42- 和 NH4+. And the concentrations of SO42-and NO3- exhibit a similar trend, which have a positively correlated with the concentration of SO2 and NO2 in the atmosphere,and have a negatively correlated with the concentration of O3.(3) OC, EC and atmospheric concentrations of fine particulate showed a positive correlation with OC, EC exists a good correlation; haze of organic carbon than non-haze of pollution, and the OC in PM2.5 pollution than PM10.(4) Atmospheric haze of fine particles of sulfur oxidation rate (SOR) and nitrogen oxidation rate (NOR) were significantly higher than non-haze period, indicating a more favorable haze of secondary ions generated; PM2.5 sulfur and nitrogen oxidation rate oxidation rate is higher than the PM10, the description of PM2.5 generated by secondary ion greater impact.(5) Jinan soluble ions showed obvious features combined pollution, in the form of (NH4)2SO4和 NH4NO3 coexist in secondary ions(NO3-,SO42-和 NH4+)aerosol systems.