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KMID : 0382420030290050034
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Korean Journal of Environmental Health Society
2003 Volume.29 No. 5 p.34 ~ p.41
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Size Distribution of Metals and Ions in Industrial Complex Aerosols in Kunsan(Korea)
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Kim Seong-Cheon
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Abstract
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The size distribution of metals and ions in aerosols has been studied in Kunsan city. Industrial complex particles were collected with a cascade impactor, which effectively separates the particulate matter into nine-size ranges. Eighty-one samples were collected in October, 200I-July. 2002. Each filter was extracted with a mixture of nitric and percloric acids. The acid solutions of the samples were analysed in three-particle fractions by Atomic Absorption Spectrophotometry(AAS; Varian SpectrAA 220). UV(U/V Spectrophotometer. Model Smart 325), and IC(Dionex. DX-5(0). The impactor stage fractionation of particles shows a typical bimodal distributions. one corresponding to the fine mode bellow 2.1-3.3㎛ (42.6%). and the other to the coarse mode around 10 11m (57.4%). With regard to the size distribution of metals and ions, we concluded that potentially toxic metals. such as cadmium. cromium. and lead. NO₃-. PO₄³-. NH₄+. Na+, and K+ are mainly accumulated in the smaller particles, with percentages of 77, 54. 67, 68, 62. 65, 53, and 62%, respectively. Lead and SO₄²- have a concentration of 26.28 ng/㎥ and 26.38㎍/㎥ more than cadmium and chromium(2.24 and 23.77 ng/㎥). And NO₃-. NH₄+, Na+, K+, and PO₄³-. have a concentration of 7.29, 0.69, 19.7, 0.9㎍/㎥, and 211.93 ㎍/㎥. And iron, CI-, SO₄²-, and Mg²+ are mainly accumulated in the coarse particles. with percentage of 32, 26, 47 and 40%. Iron. CI-, SO₄²-, and Mg²+ have a concentration of 668.6 ng/㎥. 1.88, 26.38, and 0.51㎍/㎥.
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