Source apportionment of PM2.5 in Seoul, South Korea and Beijing, China using dispersion normalized PMF

• DOI: 10.1016/j.scitotenv.2022.155056
• Publication Date: 2022-04-05T05:59:03Z
• Authors: Jieun Park; Hyewon Kim; Youngkwon Kim; Jongbae Heo; Sang-Woo Kim; Kwonho Jeon; Seung-Muk Yi; Philip K. Hopke
• Keywords: Apportionment

East Asian countries experience severe air pollution owing to their rapid development and urbanization induced by substantial economic activities. South Korea China are among the most polluted with high mass concentrations of PM2.5. Although occurrence transboundary neighboring has been recognized for a long time, studies involving simultaneous ground-based PM2.5 monitoring source apportionment in have not conducted date. This study performed daily Seoul Beijing from January December 2019. The its major chemical components were analyzed simultaneously during Positive matrix factorization (PMF) as well dispersion normalized PMF (DN-PMF) utilized ambient at two sites. 23 h average ventilation coefficients applied constituents' data. Nine sources identified both While secondary nitrate, sulfate, mobile, oil combustion, biomass burning, soil, aged sea salt commonly found sites, industry/coal combustion incinerator only incinerator/industry coal Beijing. Reduction meteorological influences DN-PMF compare C-PMF but effects DN on mobile reduced averaging over sampling period. results showed that Secondary nitrate (Seoul: 25.5%; Beijing: 31.7%) sulfate 20.5%; 17.6%) dominant contributors Decreasing contributions increasing observed