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자료유형
학술저널
저자정보
저널정보
한국대기환경학회 한국대기환경학회지(국문) 한국대기보전학회지 제8권 3호
발행연도
수록면
191 - 197 (7page)

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초록· 키워드

In order to investigate the chemical components of acid precipitation at Kangwha near the Yellow Sea and Seoul in Korea, the precipitation samples were collected by wet-only precipitation sampler from February 1991 to January 1992, and pH, electric conductivity(E. C.) and major water-soluble ionic components were analyzed. Strong negative linear correlations were observed between the rainfall amount and the sum of major ionic components in μ eq/ℓ at two sites. The sum of major ionic components also correlated negatively with rain intensity. The analytical results of precipitation samples at two sites were compared each other. Average values of volume-weighted pH were found to be 5.21 at Kangwha and 5.09 at Seoul. The cationic abundance(μ eq/ℓ) in rainwater showed the general trend NH₄⁺ > Na⁺ > Ca²⁺>Mg²⁺>H⁺>K⁺ at Kangwha and NH₄⁺>Ca²⁺>Na⁺ >H⁺>Mg²⁺>K⁺ at Seoul. The anionic abundance showed the general trend SO₄²⁻ >Cl⁻ >NO₃⁻ at Kangwha and SO₄²⁻>NO₃⁻>Cl⁻ at Seoul. The concentrations of seasalt such as Na⁺ and Cl⁻ were higher at Kangwha than Seoul. The concentrations of nss-SO₄²⁻, nss -Cl⁻ and NO₃⁻ which are acid composition were higher at Seoul(96.3μ eq/ℓ) than Kangwha(69.0μ eq/ℓ). The contribution of seasalt to the composition of precipitation were higher at Kangwha(34.1%) than Seoul(15.7%). Ammonia and calcium species in rainwater at Kangwha and Seoul are interpreted to have 91% of neutralizing capacity of the original sulfuric and nitric acids. Provided that the precipitation acidity originates primarily from sulfate and nitrate, sulfate was found to contribute about 73-75% of the free precipitation acidity.
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UCI(KEPA) : I410-ECN-0101-2009-539-012105738