| he characteristics of the water soluble ions in PM2.5were analyzed by on line ion chromatography during the Spring Festival (from February 9 to 15, 2013) in Suzhou city. It indicated that there were two heavy air pollution periods during the Spring Festival. Peak value come in the early morning of the Lunar New Year's Day，with an hourly concentration of 571μg/m3. During the timescales of concentrated setting off firecrackers and fireworks, the concentration of potassium, chloride, magnesium ion in PM2.5were increased significantly. Compared with the early morning of February 9, the concentration of potassium ion, chloride ion and magnesium ion in the early morning of the Lunar New year's Day increased 117 times, 80.7 times, and 18.0 times, respectively. According to correlation analysis, during the timescales of concentrated setting off firecrackers and fireworks, the potassium ion, magnesium ion, sodium ion, calcium ion in PM2.5 may have the similar emission source. |
