Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Comparison of Spectroscopic Characteristics and Chemical Oxygen Demand Efficiencies for Dissolved Organic Matters from Diverse Sources

기원별 용존 유기물의 분광특성 및 COD 산화율 비교

  • Jung, Ka-Young (Department of Earth and Environmental Sciences, Sejong University) ;
  • Park, Min-Hye (Department of Earth and Environmental Sciences, Sejong University) ;
  • Hur, Jin (Department of Earth and Environmental Sciences, Sejong University) ;
  • Lee, Seungyoon (Korea Water Resources Corporation, Korea Institute of Water and Environment) ;
  • Shin, Jae-Ki (Korea Water Resources Corporation, Korea Institute of Water and Environment)
  • 정가영 (세종대학교 지구환경과학과) ;
  • 박민혜 (세종대학교 지구환경과학과) ;
  • 허진 (세종대학교 지구환경과학과) ;
  • 이승윤 (한국수자원공사 K-water 연구원) ;
  • 신재기 (한국수자원공사 K-water 연구원)
  • Received : 2009.03.13
  • Accepted : 2009.06.15
  • Published : 2009.07.30
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Abstract

The spectroscopic characteristics and chemical oxygen demand (COD) oxidation efficiencies were investigated for dissolved organic matters (DOM) from diverse sources, which may indirectly affect the concentrations and the quality of DOM found in watersheds. The DOM investigated for this study showed a wide range of the percent distributions of refractory organic matter (R-OM) from 8 to 100%. Relatively high R-OM distributions were observed for the DOM with the source of head water, sediments, paddy soils, field soils, and treated sewage whereas the DOM from livestock waste, reed, weeds, algae, and attached algae exhibited lower R-OM percent distributions. The percent distribution of R-OM had positive correlations with specific UV absorbance (SUVA) and humidification indices (HIX) of DOM. The investigated DOM was classified into four different source groups (i.e., biota, vegetables, soils, sediments) by comparing the synchronous fluorescence spectra. The DOM group from biota source was characterized by a prominent presence of protein-like fluorescence (PLF) whereas fulvic-like fluorescence (FLF) was additionally observed for vegetable-source DOM. FLF became significant for the DOM from both soils and sediments although no PLF was found for soil-derived DOM. A range of COD oxidation efficiency was observed for the various DOM, ranging from 36 to 94% and from 65 to 125% for $COD_{Mn}$ and $COD_{Cr}$, respectively. The results indicate that $COD_{Cr}$ reflects the higher OM concentration than $COD_{Mn}$. However, 95% confidence intervals of the COD oxidation efficiencies were similar for the two types of COD, suggesting that $COD_{Cr}$ may not be the superior OM index to $COD_{Mn}$ in terms of the variability of the oxidation efficiency. No significant correlations were obtained between COD oxidation efficiencies and the spectroscopic characteristics of DOM for this study.

Keywords

Acknowledgement

Grant : 한강수계 난분해성물질 증감요인 규명 및 관리방안 연구

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