제주도 고산지역과 한라산 1100 고지 PM10, PM2.5 에어로졸 성분의 배경농도 비교

Abstract

The PM10 and PM2.5 aerosols have been collected at Gosan site and Mt. Halla-1100 Site in Jeju Island, and the elements as well as ionic components have been analyzed. The mass concentrations of PM10 and PM2.5 particles were 36.9±11.2 and 23.2±9.1 μg/m3 at Gosan Site, and 28.8±16.1 and 17.4±12.0 μg/m3 at Mt. Halla-1100 Site, respectively. The concentrations of PM10 ionic components were in the order of nss-SO42- > NO3- > NH4+ > Na+ > Cl- > nss-Ca2+ > K+ > Mg2+ at Gosan Site, and nss-SO42- > NH4+ > NO3- > nss-Ca2+ > Cl- > Na+ > K+ > Mg2+ at Mt. Halla-1100 Site. The concentrations of the elements were in the order of S > Al > Fe > Na > Ca > K > Mg > Pb > Ni > Zn > Cr > Mn > Co > Mo > Ti > Cu > V > Ba > Sr > Cd at Gosan Site, and S > Ca > Al > Fe > Mg > K > Na > Zn > Mn > Pb > Ti > Cr > Cu > Ba > Sr > Ni > Co > V > Mo > Cd at Mt. Halla-1100 Site. The concentrations of PM2.5 ionic components have shown the order of nss-SO42- > NH4+ > NO3- > Na+ > K+ > Cl- > nss-Ca2+ > Mg2+ at Gosan Site, and nss-SO42- > NH4+ > NO3- > Cl- > K+ > Na+ > nss-Ca2+ > Mg2+ at Mt. Halla-1100 Site. The study of Asian Dust effect showed that the concentration ratios of Asian Dust to Non Asian Dust days for PM10 particles of soil-originated nss-Ca2+, Al, Fe, Ca, Ti, Mn, Ba and Sr were, 2.2, 1.5, 2.7, 3.3, 2.7, 3.1, 2.9 and 2.8 at Gosan Site, and those at Mt. Halla-1100 Site were 4.0, 6.3, 6.4, 5.2, 4.5, 5.4, 4.4 and 3.7, respectively. From the study of size-distribution of aerosol components, nss-SO42- and NH4+ were mostly in the fine mode, but NO3- and nss-Ca2+ were distributed in the coarse mode, at both sites. From the factor analyses for the examination of the source origins, the PM10 aerosol components were originated by soil > anthropogenic > marine at Gosan Site, and soil > marine > anthropogenic at Mt. Halla-1100 site. Meanwhile, the PM2.5 aerosol components were by anthropogenic > marine > soil at both sites. The backward trajectory analyses have been performed in order to investigate the inflow path of the components of PM10 and PM2.5 fine dust particles. In the results, the concentrations of nss-SO42-, NO3-, NH4+, nss-Ca2+, and Pb were high when the air parcels had been inflowed from the China continent, but relatively low when they had come through the North Pacific Ocean and East Sea. In consequence, the air quality in Jeju area seems to be influenced largely by the pollution from China.