일반대기 중 극미세입자와 중금속 농도에 관한 연구

This study evaluated the distribution of the concentrations of nano-particles and heavy metals (08-Pb, Cr, Zn, As, Fe, 09-Pb, Cr, Zn, Cu, Ni, Mn) in Seoul, Chungnam A and Gwangyang from August to December, in 2008 5 times each in the Seoul area, 5 times in and Chungnam A area and from August to November, in 2009 14 times in the Chungnam A area, 8 times in the Gwangyang area. The examined results showed high concentration level from PM₁ through PM 0.1 in all three areas. These results were obtained the concentration of particles by diameter and statistically significant in Stage5 (1.0-0.56 ㎛) from the result of conducting Kruskal-Wallis H test (p ＜ 0.05). In the case of the heavy metal concentration included in 0.10-0.056 ㎛, 0.056 ㎛, the lead concentration of Chungnam Asan area was 6.49 ng/㎥ and 9.93 ng/㎥, which was higher than 3.05 ng/㎥ and 4.22 ng/㎥ of Seoul, respectively. The concentration of iron in Seoul was 9.28 ng/㎥ and 13.24 ng/㎥, that appeared higher than 2.38 ng/㎥ and 3.23 ng/㎥ of Chungnam A area, respectively. The concentration level was similar to other metals except lead and iron in Chungnam A area and Seoul. From the concentration of heavy metal included in 0.10-0.056 ㎛, 0.056 ㎛, the lead concentration of Chungnam A area was 0.31 ng/㎥ and 0.12 ng/㎥ while Gwangyang was 0.28 ng/㎥, 0.06 ng/㎥. Thus Chungnam A area showed higher lead concentration than Gwangyang. The manganese concentration of Chungnam A area was 0.12 ng/㎥ and 0.03 ng/㎥ while Gwangyang was 0.21 ng/㎥ and 0.08 ng/㎥. Therefore, the concentration of Gwangyang appeared higher than that of Chunnam A area. These two metals showed statistically significant in 0.056 ㎛ (p ＜ 0.05, p ＜ 0.01). Among the concentration of heavy metal in all regions, the result demonstrated that the order of higher concentration is arsenic ＞ iron ＞ zinc ＞ chrome ＞ lead ＞ nickel ＞ copper ＞ manganese.