Observation of difference in the size distribution of carbon and major inorganic compounds of atmospheric aerosols after the long-range transport between the selected days of winter and summer

New equation to predict size-resolved gas-particle partitioning quotients for polybrominated diphenyl ethers

“…The highest organic matter fraction is associated with the finest particles (52.1% in 0.056−0.1 μm) and decreases as particle size increases to reach the lowest value (1.5%) in particles larger than 18 μm. Similar results have been found by other groups in Guangzhou (China) Yu, 2009, 2012), Seoul (Korea) (Hwang et al, 2008), Southern California (USA) (Kleeman et al, 1999), in urban Chicago and over Lake Michigan (USA) (Offenberg and Baker, 2000), and in Sapporo (Japan) (Agarwal et al, 2010). We also found good correlations between our f OMi data and data collected in Seoul (r = 0.84), in urban Chicago (r = 0.66), and over Lake Michigan (r = 0.67) (Figure A.6).…”

Effects of reactive oxygen species generation induced by Wonju City particulate matter on mitochondrial dysfunction in human middle ear cell

“…However, at concentrations greater than 200 μg/mL, the cytotoxicity induced by the collected PM was higher than that of SRM, indicating that the cytotoxicity of the collected PM was higher than that of the SRM. The higher concentration of urban particles in Wonju relative to that in other urban areas in the winter may explain the observed results (Hwang et al 2008).…”

“…Atmospheric local urban 10-μm-diameter PM (PM10) was collected from Wonju City from November 26, 2018 to December 31, 2018, using an air sampler (Total Engineering Co., BMW-4000) with a Teflon filter (PALL Co., Teflon, 2.0-μm pore). The volume mean diameter of SRM was 5.85 μm; whereas, the typical volume mean diameter of PM at Wonju in winter is approximately 2 μm, as reported by Hwang et al (2008). The collected PM was extracted in a 50-mL tube by sonication for 20 min in DW (Milli Q Water; Merck Millipore, Burlington, MA, USA).…”

“…We collected local urban PM from Wonju City, the region with the highest annual concentration of atmospheric PM in Korea, especially in the winter. This is due to local emission sources and the transport of air pollutants from the upwind Seoul metropolitan area (Hwang et al 2008). We used local urban PM containing a high concentration of toxic fine particles and standard urban PM to investigate the inflammatory responses in the ear.…”