한국대기환경학회지 (Journal of Korean Society for Atmospheric Environment)

  • 제24권6호
  • /
  • Pages.682-692
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  • 2008
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  • 1598-7132(pISSN)
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  • 2383-5346(eISSN)
한국대기환경학회 (Korean Society for Atmospheric Environment)
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춘천시 PM2.5의 질량농도 및 이온성분 농도의 특성에 관한 연구

Study on Characteristics of PM2.5 and Its Ionic Constituents in Chuncheon, Korea

  • 정진희 (강원대학교 자연과학대학 환경과학과) ;
  • 한영지 (강원대학교 자연과학대학 환경과학과)
  • Jung, Jin-Hee (Department of Environmental Science, College of Natural Science, Kangwon National University) ;
  • Han, Young-Ji (Department of Environmental Science, College of Natural Science, Kangwon National University)
  • 발행 : 2008.12.31
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초록

Fine particles ($PM_{2.5}$) were collected and analyzed from November 2005 through August 2007 in Chuncheon, Korea to investigate the characteristics of $PM_{2.5}$ and its ionic constituents. The average $PM_{2.5}$ concentration during the study period was $39{\mu}g/m^3$, which is almost two times higher than the annual US NAAQS $PM_{2.5}$ standard of $15{\mu}g/m^3$. $PM_{2.5}$ concentrations were higher in spring and winter than in summer and fall. During spring, Asian Dust events dramatically enhanced $PM_{2.5}$ concentrations, and long-range transport of $PM_{2.5}$ emitted in industrial area of China often occurred during winter based on trajectory analysis. Contribution of $PM_{2.5}$ to $PM_{10}$ concentrations ranged from $72{\mu}g/m^3$ during Asian Dust events to $457{\mu}g/m^3$, indicating that a large portion of $PM_{2.5{\sim}10}$ was transported from China during Asian Dust events. Among the major ionic constituents ${SO_4}^{2-}$ showed the highest concentration, followed by ${NH_4}^+$, ${NO_3}^-$ and ${NO_2}^-$. Chuncheon appeared to be ${NH_4}^+$ rich environment, indicating that $(NH_4)_{2}SO_4$ and ${NH_4}{NO_3}$ were the predominant forms of ${NO_3}^-$ and ${SO_4}^2$ in $PM_{2.5}$. Haze has frequently occurred in Chuncheon since So-Yang dam was constructed in 1973. Haze events were observed on 23 days during sampling period, and the average $PM_{2.5}$ concentration was approximately 1.6 times higher during haze events than during non-haze events. This result suggests that haze enhances the secondary aerosol formation because the aerosol spontaneously absorbs water to form a saturated salt solution, deriving a significant increase in the mass of the particle.

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  8. Influences of Asian Dust, Haze, and Mist Events on Chemical Compositions of Fine Particulate Matters at Gosan Site, Jeju Island in 2014 vol.32, pp.1, 2016, https://doi.org/10.5572/KOSAE.2016.32.1.067