Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Organic Phosphorus Decomposition Rates in the Youngsan River and the Sumjin River, Korea

국내 영산강과 섬진강의 유기인 분해속도

  • Islam, Jahidul Mohammad (Department of Environmental Science, Kangwon National University) ;
  • Kim, Bomchul (Department of Environmental Science, Kangwon National University) ;
  • Han, Ji-sun (Department of Environmental Science, Kangwon National University) ;
  • Kim, Jai-ku (Department of Environmental Science, Kangwon National University) ;
  • Jung, Yukyong (Department of Environmental Science, Kangwon National University) ;
  • Jung, Sungmin (Department of Environmental Science, Kangwon National University) ;
  • Shin, Myoungsun (Department of Environmental Science, Kangwon National University) ;
  • Park, Ju-hyun (National Institute of Environmental Research)
  • Received : 2008.03.21
  • Accepted : 2008.05.15
  • Published : 2008.05.30
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Abstract

The variability in the phosphorus concentrations and the decomposition rates of organic phosphorus were measured in two rivers, the Youngsan River and the Sumjin River through four surveys in June, August and December of 2006 and February of 2007. Water samples were incubated for 20 days in a dark incubator and the change of forms of phosphorus (POP, DOP, DIP) were analyzed. By fitting the change to four types of models the decomposition rates of organic phosphorus were determined. The mean total organic phosphorus (TOP) decomposition rate coefficients in the Youngsan River and the Sumjin River were $0.036day^{-1}$ and $0.035day^{-1}$, respectively. In POP$\rightarrow$DIP model, the average decomposition rate coefficients in the Youngsan River and the Sumjin River were 0.049 and $0.035day^{-1}$, respectively. The average POP decomposition rate coefficients of POP$\rightarrow$DOP$\rightarrow$DIP model were $0.042day^{-1}$ and $0.038day^{-1}$ in the Youngsan River and Sumjin River respectively while the mean DOP decomposition rate coefficients were $0.255day^{-1}$ and $0.244day^{-1}$, respectively. In the Youngsan River, the mean POP$\rightarrow$DOP decomposition rate coefficient and POP$\rightarrow$DIP decomposition rate coefficient of POP$\rightarrow$DOP$\rightarrow$DIP, POP$\rightarrow$DIP model were $0.039day^{-1}$ and $0.007day^{-1}$, respectively. And in the Sumjin River, the above decomposition rate coefficients were $0.031day^{-1}$ and $0.004day^{-1}$, respectively. The decomposition rate coefficients measured in this study might be applicable for modeling of river water quality.

국내 영산강과 섬진강의 인 농도변동과 유기인 분해속도를 조사하였다. 2006년 6월, 8월, 12월 그리고 2007년 2월까지 총 4회 조사가 이루어졌다. 채수된 시료는 암 조건에서 20일 동안 보관하여 인의 존재 형태변화를 분석하였다 (POP, DOP, DIP). 유기인의 분해속도는 일차반응식을 가정하여 4개 모델에 의해 결정되었다. 평균 TOP 분해속도 계수는 영산강과 섬진강에서 각각 $0.036day^{-1}$, $0.035day^{-1}$였다. POP-DIP로 모델의 경우 영산강과 섬진강의 평균 분해속도 계수는 각각 $0.049day^{-1}$, $0.035day^{-1}$였다. POP-DOP-DIP 모델에서 영산강과 섬진강의 평균 POP분해속도 계수는 각각 $0.042day^{-1}$, $0.038day^{-1}$였으며, 평균 DOP 분해속도계수는 영산강 $0.255day^{-1}$ 그리고 섬진강에서 $0.244day^{-1}$로서 DOP분해속도가 더 빠른 것으로 나타났다. 영산강에서 평균 POP-DOP분해속도 계수와 POP-DIP 분해속도 계수를 비교한 결과 각각 $0.039day^{-1}$와 $0.007day^{-1}$였다. 섬진강의 경우 위 모델에서 분해속도 계수는 각각 $0.031day^{-1}$과 $0.004day^{-1}$였다. 본 연구에서 측정된 분해속도계수는 하천수질의 모델링에 적용될 수 있다.

Keywords

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