标题：The pollution characteristics and source analysis of water-soluble ions in indoor PM 2.5 during the Spring Festival in Jingyue Suburb of Changchun City
期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2020
卷号：474
期号：5
页码：1-10
DOI：10.1088/1755-1315/474/5/052099
语种：English
出版社：IOP Publishing
摘要：The characteristics of water-soluble ions in indoor PM2.5 during the Spring Festival in Changchun City were analyzed by ion chromatography. The results showed that the main water-soluble ionic components in the indoor and non-combustion periods were SO42- and Ca2+, and the concentration of Na+, K+, Mg2+, F-, Cl- and NO3- increased in the fireworks and firecrackers, among which Cl- and NO3-. The concentration increased significantly compared with the non-combustion period, and peaked with PM2.5 concentration in the first month of the first month and the first month of the first month; the correlation between NH4+ and SO42- during the discharge and non-combustion periods was greater than the correlation between NH4+ and NO3-, NH4+ Sulfate is preferentially combined with SO42-, and secondary ions are mainly in the form of (NH4)2SO4 and NH4NO3. Cluster analysis and correlation analysis indicate that the sources of water-soluble ions in indoor PM2.5 during the Spring Festival can be classified into four categories. Biomass combustion source, automobile exhaust gas source, coal-fired emission source and soil dust, among which the main sources of Na+, K+, Mg2+, Cl-, SO42- during the discharge period are the fireworks and firecrackers.
