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http://dx.doi.org/10.5532/KJAFM.2007.9.1.049

Characteristics of Ionic Composition of Rainwater in Taean  

Lee, Jong-Sik (National Institute of Agricultural Science and Technology, RDA)
Kim, Gun-Yeob (National Institute of Agricultural Science and Technology, RDA)
Lee, Jeong-Taek (National Institute of Agricultural Science and Technology, RDA)
Lee, Kwan-Yong (Taean-gun Agricultural Development & Technology Center)
Park, Byoung-Yong (Taean-gun Agricultural Development & Technology Center)
Publication Information
Korean Journal of Agricultural and Forest Meteorology / v.9, no.1, 2007 , pp. 49-54 More about this Journal
Abstract
The issue of acid precipitation and related environmental problems in East Asia has been emerging. To evaluate the acidity and chemical characteristics of rainwater in Korea, its chemical properties during cultivation season from April to October in 2005 were investigated at Taean. Also, to estimate the contribution of ions on acidity, ion composition characteristics and neutralization effects by cations were determined. The electrical conductivity balance between measured and estimated values showed a high correlation. Rainwater was highly distributed in the range of pH $4.5{\sim}5.0$. The acidity of rainwater was relatively low during the month of June compared with other monitored periods. $Na^+$ was the main cation, followed by $H^+>Ca^{2+}>NH_4^+>K^+>Mg^{2+}$. Among these ions, $Na^+,\;NH_4^+,\;Ca^{2+}$ and $H^+$ comprised over 94% of the total cations. Rainwater anion composition was more than 80% with $SO_4^{2-}$ and $NO_3^-$. In rainwater samples, $NH_4^+$ and $Ca^{2+}$ contributed greatly to neutralizing the rain acidity. The sulfate content decreased until September, and sea salt derivatives were higher in May and October than during other monitored periods. Also, 78% of the soluble sulfate in rainwater was nss-$SO_4^{2-}$ (non-sea salt sulfate).
Keywords
Rainwater; Taean; Ion; Neutralization; Non-sea salt sulfate;
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Times Cited By KSCI : 1  (Citation Analysis)
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