- P-ISSN 1225-0163
- E-ISSN 2288-8985
제주도 한라산 1100고지에서 2011~2012년에 PM10과 PM2.5 미세먼지를 채취하여 이온 및 원소성분을 분석한 결과로부터 대기 미세먼지 조성과 배출원 특성을 조사하였다. 연구기간의 PM10과 PM2.5 질량농도는 각각 22.0±13.1 μg/m3, 11.3±6.1 μg/m3로 수도권지역의 2.4~2.6배 낮은 수준을 보였다. 2차 오염물질(nss-SO4 2−, NH4 +, NO3 −)의 조성은 PM10과 PM2.5에서 각각 85.5 %, 91.3%로 가장 높았고, 다음으로 해양기원 성분(Na+, Cl−, Mg2+), 유기산 이온(HCOO−, CH3COO−), 토양성분(nss-Ca2+) 순으로 높은 조성비를 나타내었다. 또한 PM10 원소성분은 토양기원 성분들(Al, Fe, Ca)이 50.9%로 해양기원 및 인위적 기원 성분에 비해 더 높은 경향을 보였다. 미세먼지의 산성화에는 주로 황산과 질산이 영향을 미치고, 이들 무기산의 중화에는 PM2.5에서 주로 암모니아, PM10에서 주로 탄산칼슘에 의해 일어나는 것으로 조사되었다. 역궤적 군집분석에 의해 기류 유입경로를 확인한 결과 47%가 중국대륙으로부터 유입되었고, 특히 NO3 −과 nss-Ca2+ 성분은 중국에서 기류가 유입되었을 때 높은 농도를 나타내었다.
PM10 and PM2.5 samples were collected at the 1100 site of Mt. Halla in Jeju Island during 2011~2012, and their ionic and elemental species were analyzed, in order to investigate the characteristics of emission sources as well as aerosol compositions. The mass concentrations of PM10 and PM2.5 were 22.0±13.1 μg/m3 and 11.3±6.1 μg/m3, respectively, showing 2.4~2.6 times lower than those of the capital city area of Korea. The composition ratios of major secondary pollutants (nss-SO4 2−, NH4 +, and NO3 −) were the highest as 85.5 % for PM10 and 91.3% for PM2.5, and followed by the order of marine (Na+, Cl−, and Mg2+), organic acid (HCOO− and CH3COO−), and soil (nss-Ca2+) sources. Among the elemental species in PM10, soil-originated components (Al, Fe, and Ca) were consisted of 50.9 %, which was higher proportion than marine and anthropogenic elements. The acidification of the fine particulate matters was found to be influenced mostly by sulfuric and nitric acids, and these acids were mainly neutralized by calcium carbonate in PM10 and by ammonia in PM2.5. The clustered back trajectories showed that 47 % of total air mass inflows was from the China, and the concentrations of NO3 − and nss-Ca2+ were especially high corresponding to the inflows.
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