The pollution characteristics and source analysis of water-soluble ions in indoor PM2.5 during the Spring Festival in Jingyue Suburb of Changchun City. Issue 5 (April 2020)

• Record Type: Journal Article
• Authors: Li, Bai; Li, Chunhui; He, Zijian
• Is Part Of: IOP conference series. Volume 474:Issue 5(2020)
• Publication Date: 2020-04
• Subjects: Earth sciences -- Periodicals; Environmental sciences -- Congresses; Environmental sciences -- Periodicals; 550.5
• DOI: 10.1088/1755-1315/474/5/052099
• Languages: English
• ISSNs: 1755-1307

Abstract

Abstract: 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 SO4 2 - and Ca 2+, and the concentration of Na +, K +, Mg 2+, 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 SO4 2 - during the discharge and non-combustion periods was greater than the correlation between NH4 + and NO3 -, NH4 + Sulfate is preferentially combined with SO4 2 -, and secondary ions are mainly in the form of (NH4 )2 SO4 and NH4 NO3 . 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 +, Mg 2+, Cl -, SO4 2 - during the discharge period are the fireworks and firecrackers.