Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Correlation between TOC and Water Pollution Index in Major Streams of Gwangju

광주지역 주요하천에서 TOC 특성과 수질오염지표와의 상관성에 관한 연구

  • Yang, Yoon-Cheol (Gwangju Metropolitan Health & Environment Research Institute) ;
  • Lee, Dae-Haeng (Gwangju Metropolitan Health & Environment Research Institute) ;
  • Lee, Kyung-Seog (Gwangju Metropolitan Health & Environment Research Institute) ;
  • An, Sang-Su (Gwangju Metropolitan Health & Environment Research Institute) ;
  • Song, Hyeong-Myeong (Gwangju Metropolitan Health & Environment Research Institute) ;
  • Lee, Se-Haeng (Gwangju Metropolitan Health & Environment Research Institute) ;
  • Yoon, Sang-Hoon (Gwangju Metropolitan Health & Environment Research Institute) ;
  • Kim, Sun-Jung (Gwangju Metropolitan Health & Environment Research Institute) ;
  • Jeon, Hong-Dae (Gwangju Metropolitan Health & Environment Research Institute) ;
  • Cho, Young-Gwan (Gwangju Metropolitan Health & Environment Research Institute) ;
  • Seo, Gwang-Yeob (Gwangju Metropolitan Health & Environment Research Institute)
  • 양윤철 (광주광역시 보건환경연구원) ;
  • 이대행 (광주광역시 보건환경연구원) ;
  • 이경석 (광주광역시 보건환경연구원) ;
  • 안상수 (광주광역시 보건환경연구원) ;
  • 송형명 (광주광역시 보건환경연구원) ;
  • 이세행 (광주광역시 보건환경연구원) ;
  • 윤상훈 (광주광역시 보건환경연구원) ;
  • 김선정 (광주광역시 보건환경연구원) ;
  • 전홍대 (광주광역시 보건환경연구원) ;
  • 조영관 (광주광역시 보건환경연구원) ;
  • 서광엽 (광주광역시 보건환경연구원)
  • Received : 2017.01.31
  • Accepted : 2017.03.29
  • Published : 2017.03.30
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Abstract

This study was performed to verify the replacement of COD to TOC, which is more accurate and reliable in analysis, as the water quality pollution index and to investigate the characteristics of water quality and the correlations for organic matter, suspended solids and nutrient materials during 2012 to 2015. The oxidation rates were compared by calculating the values of BOD-C/TOC & COD-C/TOC. The average value of TOC was 3.4(1.1 ~ 8.0) mg/L at 14 sites during the period. The ratios of BOD-C/TOC and COD-C/TOC, that mean the resolvability amounts among all carbon materials, were 28.8% and 62.7%, respectively. The correlation coefficient of TOC to COD at all sites was 0.718 (p<0.01), the highest value in comparing all items. The correlation coefficient of TOC to COD at Gwangju stream was 0.753 (p<0.01), the highest compare to the values at other rivers. The correlation coefficient of TOC to COD was 0.757 (p<0.01) at all sites in the range of TP-III ($0.1{\leq}TP$) and the value was 0.762 (p<0.01) in the range of TN-II ($2.0{\leq}TN$<3.0). As a result, TOC could be used as a water pollution index of organic matter instead of COD.

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References

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