Acidification and Neutralization Characteristics of Atmospheric Fine Particles at Gosan Site of Jeju Island in 2008

Abstract

서 론우리나라에서는 AbstractThe collection of PM 10 and PM 2.5 samples was made at Gosan site of Jeju Island. Their ionic compositions of both inorganic and organic phases were then analyzed to examine their acidification and neutralization characteristics in atmospheric aerosols. The mass concentrations of PM 10 and PM 2.5 at Gosan site were 37.6±20.1 and 22.9±14.3 μg/m 3 , respectively, showing the content ratio of PM 2.5 to PM 10 as 61.0%. In the evaluation of ionic balance, the correlation coefficients (r) between the sums of cationic and anionic equivalent concentrations were excellent with 0.982 (PM 10 ) and 0.991 (PM 2.5 ). The concentration ratios of PM 2.5 /PM 10 derived for nss-SO 4 2-, NO 3 -, and NH 4 + + were 0.94, 0.56, and 1.02, respectively, indicating the relative dominance of fine fractions. The acidifying capacity of inorganic anions (SO 4 2-and NO 3 -) in PM 10 and PM 2.5 were 96.5% and 97.3%, while those of organic anions (HCOO -and CH 3 COO -) in each fraction were 2.9% and 2.0%, respectively. On the other hand, the neutralizing capacity of PM 10 and PM 2.5 by NH 3 were 72.8% and 82.3%, while their CaCO 3 counter parts were 22.5% and 13.3%, respectively.