Composition comparison of PM 10 and PM 2.5 fine particulate matter for Asian dust and haze events of 2010-2011 at Gosan site in Jeju Island

The PM10 and PM2.5 samples were collected at Gosan Site of Jeju Island, and analyzed, in order to investigate the size distribution and pollution characteristics of their components. NH4+, nss-SO42-, K+, and CH3COO- were mostly existed in fine particles. Meanwhile, NO3- was distributed in both fine and coarse particles, and Na+, Cl-, Mg2+, nss-Ca2+ were rich in coarse particle mode. The concentrations of nss-Ca2+ and NO(3)(-)were increased 36.7 and 3.2 times in coarse particles, and 15.0 and 3.1 times in fine particles during the Asian Dust periods. Especially, the concentrations of crustal elemental species such as Al, Fe, Ca, K, Mg, Ti, Mn, Sr, Ba were highly increased for those periods. In the haze events, the concentrations of secondary air pollutants were increased 1.3 similar to 2.6 and 1.5 similar to 4.2 times in coarse and fine particles, respectively. Moreover, the remarkable increase of NO3- concentration was also observed in fine particle mode. The factor analysis showed that the composition of coarse particles was influenced mainly by marine sources, followed by soil and anthropogenic sources. On the other hand, the fine particles were influenced by anthropogenic sources, followed by marine and soil sources.