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KMID : 1024519960050060739
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Journal of the Environmental Sciences
1996 Volume.5 No. 6 p.739 ~ p.748
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Chemical Characterization of Rainwater Sampled in Cheju city
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Lee Ki-Ho
Huh Chul-Gu
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Abstract
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This study was carried out to investigate the chemical characteristics ol rainwater sampled in Cheju City from July 1994 to June 1996. Concentrations of major ions (Cl-,, , , , , and ) were determined. The pH of rainwater, calculated from the volume weighted H+ concentration, was found to be 5.61, indicating extensive neutralization of the acidity in the rain. The relative magnitude of average ionic concentrations followed the relation Cl-> ) > > > > > . The ions associated with sea salt, namely and , dominated the total concentration of ions in the rainwater and the ion accounts for 20% of total concentration. [H+][nss-SO42-+NO3] ratio and a multiple regression for and NO3- ions against , and suggested that all of and in rainwater was not necessarily associated with and , but might also occur in combination with or . The monthly mean concentrations of -, and in spring time was higher than those in other seasons. These results may De attributed to the fertilizer application as the local sources and the yellow sand phenomina as a regional-scale sources.
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KEYWORD
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Precipitation chemistry, rainwater, major ions, multiple regression, Cheju City, Korea
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