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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 58, Number 3
JKCSEZ 58(3)
June 20, 2014 

Chemical Composition Characteristics of Fine Particulate Matter at Atmospheric Boundary Layer of Background Area in Fall, 2012

배경지역 대기경계층 미세먼지의 화학조성 특성: 2012년 가을 측정
Hee Jung Ko, Yoon Sang Lee, Won Hyung Kim, Jung Min Song, Chang Hee Kang*

고희정, 이윤상, 김원형, 송정민, 강창희*
미세먼지, PM10, PM2.5, 한라산 1100 고지, 대기경계층(ABL) , Fine particulate matter, PM10, PM2.5, 1100 m site of Mt. Halla, Atmospheric boundary layer (ABL)
국내 배경지역인 제주도 한라산 1100 고지에서 2012년 가을철에 PM10, PM2.5 미세먼지를 채취하여 이온 및 원소 성 분을 분석한 결과로부터 대기경계층(ABL) 미세먼지의 화학조성과 입자크기별 분포 특성을 조사하였다. PM2.5 미세입자(dp< 2.5 μm)에서는 2차 오염물질인 nss-SO4 2-, NH4 +, NO3 - 농도가 각각 4.84, 1.98, 1.27 μg/m3로 상대적으로 높고, 전체 질량의 58.2%를 차지하였다. 반면에 PM10-2.5 조대입자(2.5 μm<dp< 10 μm)에서는 이들 세 성분의 농도가 각각 0.63, 0.21, 1.10 μg/m3로 전체 질량의 22.8%를 차지하였다. 또 수용성 이온성분들 중 NH4 +, nss-SO4 2-, K+, CH3COO-은 주로 미세입자에 분포하고, NO3 -은 미세입자와 조대입자에 고르게 분포하나, Na+, Cl-, Mg2+, nss-Ca2+은 조대입자에 더 많이 분포하는 특징을 나타내었다.

The collection of PM10 and PM2.5 fine particulate matter samples was made at the 1100 m site of Mt. Halla of Jeju Island, located at the atmospheric boundary layer (ABL) of background area, during the fall of 2012. Their ionic and elemental species were analyzed, in order to investigate the chemical compositions and size distribution characteristics. In PM2.5 fine particles (dp< 2.5 μm), the concentrations of the secondary formed nss-SO4 2-, NH4 + and NO3 - species were 4.84, 1.98, and 1.27 μg/m3, respectively, showing 58.2% of the total PM2.5 mass. On the other hand, their concentrations in PM10-2.5 coarse particles (2.5 < dp< 10 μm) were 0.63, 0.21 and 1.10 μg/m3, respectively, occupying 22.8% of the total PM10-2.5 mass. The comparative study of size distribution has resulted that NH4 +, nss-SO4 2-, K+ and CH3COO- are mostly existed in fine particles, and NO3 - is distributed in both fine and coarse particles, but Na+, Cl-, Mg2+and nss-Ca2+ are rich in coarse particle mode.

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