[논문]Comparison of the Number Concentration and the Chemical Composition of the Atmospheric PM2.5 in Jeju Area

Kang, Chang-Hee; Hu, Chul-Goo

doi:10.5322/jesi.2014.5.743

[국내논문] Comparison of the Number Concentration and the Chemical Composition of the Atmospheric PM2.5 in Jeju Area 원문보기

Journal of environmental science international = 한국환경과학회지, v.23 no.5, 2014년, pp.743 - 753

Kang, Chang-Hee (Department of Chemistry, Jeju National University) , Hu, Chul-Goo (Department of Environmental Engineering, Jeju National University)

Abstract ▼ AI-Helper

The number concentrations and the water soluble ionic concentrations of $PM_{2.5}$ have measured at Gosan site in Jeju, Korea, from March 2010 to December 2010, to clarify their characteristics. $PM_{2.5}$ number concentrations vary from 22.57 to $975.65particles/cm^3$ with an average value of $240.41particles/cm^3$, which have been recorded evidently high in spring season as compared with those in other season. And the concentrations in small size ranges are greatly higher than those in large size ranges, so the number concentration in the size range $0.25{\sim}0.45{\mu}m$ has more than 94% of the total number concentration of $PM_{2.5}$. The major ionic components in $PM_{2.5}$ are $SO{_4}^{2-}$, $NH_4{^+}$ and $NO_3{^-}$, which are mainly originated from anthropogenic sources, on the other hand, the concentrations of $Cl^-$, $K^+$, $Ca^{2+}$ and $Mg^{2+}$ are recorded relatively lower levels. The concentrations of the major ionic components are very high in spring season, but the concentration levels of the other components are recorded significantly high in winter season. On the other hand, in summer season, the lowest concentration levels are observed for overall components as well as the sum of them. The concentration ratios of nss-$SO{_4}^{2-}/SO{_4}^{2-}$ and nss-$Ca^{2+}/Ca^{2+}$ are 98.1% and 88.9%. And the concentration ratio of $SO{_4}^{2-}/NO_3{^-}$(3.64) is greatly higher than the value in urban area due to no large $NO_x$ emission sources in the measurement. In addition, the correlation and the factor analysis for the number and the ionic concentrations of $PM_{2.5}$ are performed to identify their sources. From the Pearson correlation analysis and the factor analysis, it can be suggested that the smaller parts(< $0.5{\mu}m$) of $PM_{2.5}$ is contributed by anthropogenic sources, but the sources of the remaining larger parts of $PM_{2.5}$ are not able to be specified sources in this study.

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제안 방법

In this study, the number concentration and chemical compositions of PM_2.5 are measured to examine the characteristics of the atmospheric PM_2.5 in Jeju area. And the factor analysis and correlation analysis for the number concentration and water soluble ionic concentration have been carried out to identify the sources of PM_2.
This instrument measures atmospheric aerosol number concentration in 30-channel of different size range from 0.25∼0.28 ㎛ to 30.0∼32.0㎛, such as 11-channel in range of 0.25∼1.0 ㎛, 4-channel in range of 1.0∼2.5 ㎛, 8-channel in range of 2.5∼10.0 ㎛, 7-channel in range of 10.0∼32.0 ㎛.

대상 데이터

The measurement site, Gosan(33˚17'N, 126˚10'E), is located at the western tip of Jeju Island.
The island is located in the East China Sea, ∼100 km south of the Korea mainland, ∼250 km west of Kyushu, Japan, ∼500 km east-northeast of Shanghai, China. The site is about 70 m above sea and adjacent to the seashore.

참고문헌 (17)

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[국내논문] Comparison of the Number Concentration and the Chemical Composition of the Atmospheric PM2.5 in Jeju Area 원문보기

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[국내논문] Comparison of the Number Concentration and the Chemical Composition of the Atmospheric PM2.5 in Jeju Area 원문보기

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