한국토양비료학회지 (Korean Journal of Soil Science and Fertilizer)

  • 제40권2호
  • /
  • Pages.151-155
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  • 2007
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  • 0367-6315(pISSN)
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  • 2288-2162(eISSN)
한국토양비료학회 (Korean Society of Soil Science and Fertilizer)
권호 표지

수원지역 빗물의 이온 조성

Characteristics of Ionic Composition of Rainwater in Suwon

  • 이종식 (농업과학기술원 환경생태과) ;
  • 정구복 (농업과학기술원 환경생태과) ;
  • 김진호 (농업과학기술원 환경생태과) ;
  • 김원일 (농업과학기술원 환경생태과) ;
  • 이정택 (농업과학기술원 환경생태과)
  • Lee, Jong-Sik (National Institute of Agricultural Science and Technology, RDA) ;
  • Jung, Goo-Bok (National Institute of Agricultural Science and Technology, RDA) ;
  • Kim, Jin-Ho (National Institute of Agricultural Science and Technology, RDA) ;
  • Kim, Won-Il (National Institute of Agricultural Science and Technology, RDA) ;
  • Lee, Jeong-Taek (National Institute of Agricultural Science and Technology, RDA)
  • 투고 : 2007.01.25
  • 심사 : 2007.03.15
  • 발행 : 2007.04.30
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초록

수원지역에서 영농기간 중 강우의 화학적 특성을 알아보기 위하여 2005년 4월부터 10월까지 39점의 빗물을 채수하여 pH 및 화학적 성분조성을 조사하였다. 강우량을 고려한 가중평균(volume-weighted mean) 이온농도 변화와 알카리성 물질들에 의한 빗물의 산성도 중화를 평가한 결과는 다음과 같다. 시료분석의 신뢰성을 검토한 이온균형과 전기전도도 수지 평가에서는 각각 높은 상관을 나타내어 분석 이온들에 대한 신뢰가 인정되었다. 조사기간 동안 빗물의 pH 분포는 pH 4.5~5.6 범위가 많았으며, 월별로는 6월이 다른 조사기간에 비해 높았다. 강우량와 빗물의 EC 관계에서는 강우량이 증가한 5월 이후 낮은 EC값을 보이다가 강우량이 적었던 10월부터 다시 증가하는 경향을 보였다. 빗물의 조성에서 양이온 구성은 $Na^+$ > $NH^{4+}$, $Ca^{2+}$, $H^+$ > $K^+$ > $Mg^{2+}$의 순이었으며, $Na^+$, $NH_4{^+}$, $Ca^{2+}$ 및 $H^+$가 전체 양이온 함량의 93% 이상을 차지하였다. 음이온은 $SO{_4}^{2-}$ > $NO_3{^-}$ > $Cl^-$ 순으로 $SO{_4}^{2-}$ 및 $NO_3{^-}$가 약 86%를 차지하였다. 조사기간 중 강우 산성도 중화는 6월이 다른 기간에 비해 높았음을 보였다. 총 sulfate 함량 중 nss-$SO{_4}^{2-}$ 함량은 88%로 빗물중에 함유된 sulfate의 대부분이 인위적인 발생원에서 기인되었다.

The issue of acid precipitation and related environmental problems in East Asia have been emerging. To evaluate the acidity and chemical characteristics of rainwater in Korea, its chemical properties during crop cultivation season from April to October were investigated at Suwon, Korea. Also, to estimate the contribution of ions on its acidity, ion composition characteristics and neutralization effects by cation ions were determined. Ion balance and electrical conductivity balance between the measured and estimated values showed high correlation. Rainwater had distributed highly in the range of pH 4.5~5.6. The pH of rainwater was relatively high at June as compared with other monitoring periods. $Na^+$ was the main cation followed by $NH_4{^+}$, $Ca^{2+}$, $H^+$ > $K^+$ > $Mg^{2+}$. Among these, $Na^+$, $NH_4{^+}$, $Ca^{2+}$ and $H^+$ covered over 93% of total cations. About 86% of anion in rainwater was composed of $SO{_4}^{2-}$ and $NO_3{^-}$. In rainwater samples, $NH_4{^+}$ and $Ca^{2+}$ contributed greatly to neutralization of the rain acidity. Also, 88% of soluble sulfate in rainwater was nss-$SO{_4}^{2-}$(non-sea salt sulfate).

키워드

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