Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Development of Estimation Indices for Refractory Organic Matter in the Han-River Basin using Organic Matter Parameters and Spectroscopic Characteristics

일반 유기물 항목과 분광특성을 이용한 한강수계 내 난분해성 물질 지표 제시

  • Lee, Bomi (Department of Environment and Energy, Sejong University) ;
  • Lee, Tae-Hwan (Department of Environment and Energy, Sejong University) ;
  • Hur, Jin (Department of Environment and Energy, Sejong University)
  • 이보미 (세종대학교 환경에너지융합학과) ;
  • 이태환 (세종대학교 환경에너지융합학과) ;
  • 허진 (세종대학교 환경에너지융합학과)
  • Received : 2011.05.11
  • Accepted : 2011.08.09
  • Published : 2011.09.30
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Abstract

A long-term water quality monitoring in the Han River Basin reveals a consistent increasing trend for the concentration of refractory organic matter (R-OM) in major monitoring sites of the watershed. Because the determination of R-OM concentrations typically requires a long time of microbial incubation, it is essential to present the estimation indices for R-OM for an efficient watershed management. In this study, a number of surface water samples were classified into three groups, each of which were collected from Lake Paldang, rivers at rain and non-rain events, respectively. The corresponding R-OM concentrations were correlated with biochemical oxygen demand (BOD), chemical oxygen demand (COD), and total organic carbon (TOC) concentrations as well as ultraviolet and fluorescence intensities of the filtered samples. Among the traditional organic matter parameters, TOC exhibited the highest correlation coefficient with the R-OM concentrations regardless of the types of the sample groups. The equations for conversing TOC into R-OM concentrations were finally suggested as $0.43{\times}TOC+1.12$, $0.44{\times}TOC+0.61$, $0.24{\times}TOC+1.28$ for river samples at rain and non-rain events, and lake samples, respectively. TOC-BOD(C), the values of the TOC concentrations subtracted by carbon-converted BOD concentrations, was a good index for estimating the absolute concentrations of R-OM. UV absorbance at 254 nm was well correlated with R-OM concentrations of river samples while fluorescence intensities at 350 nm showed an excellent relationship with R-OM concentration of the lake samples. Our results suggests that simple spectroscopic parameters could be applied for in-situ monitoring tool techniques in watersheds.

Keywords

References

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