Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Change in Geochemical Characteristics of Surface Sediments in the Nakdong River Main Stream

낙동강 본류에 분포하는 표층 퇴적물의 지화학적 특성 변화

  • Kim, Shin (Nakdong River Environment Research Center, National Institute of Environmental Research) ;
  • Lee, Kwonchul (Nakdong River Environment Research Center, National Institute of Environmental Research) ;
  • Kim, Jueon (Nakdong River Environment Research Center, National Institute of Environmental Research) ;
  • Jung, Kangyoung (Nakdong River Environment Research Center, National Institute of Environmental Research) ;
  • Ahn, Jungmin (Nakdong River Environment Research Center, National Institute of Environmental Research) ;
  • Kim, Hyounggeun (Nakdong River Environment Research Center, National Institute of Environmental Research) ;
  • Lee, Injung (Nakdong River Environment Research Center, National Institute of Environmental Research) ;
  • Shin, Dongseok (Nakdong River Environment Research Center, National Institute of Environmental Research) ;
  • Yang, Deukseok (Nakdong River Environment Research Center, National Institute of Environmental Research)
  • 김신 (국립환경과학원 낙동강물환경연구소) ;
  • 이권철 (국립환경과학원 낙동강물환경연구소) ;
  • 김주언 (국립환경과학원 낙동강물환경연구소) ;
  • 정강영 (국립환경과학원 낙동강물환경연구소) ;
  • 안정민 (국립환경과학원 낙동강물환경연구소) ;
  • 김형근 (국립환경과학원 낙동강물환경연구소) ;
  • 이인정 (국립환경과학원 낙동강물환경연구소) ;
  • 신동석 (국립환경과학원 낙동강물환경연구소) ;
  • 양득석 (국립환경과학원 낙동강물환경연구소)
  • Received : 2016.11.30
  • Accepted : 2017.02.17
  • Published : 2017.03.31
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Abstract

To certificate change in the geochemical characteristics of surface sediments in the main stream of the Nakdong River, surface sediments from 12 sampling sites during the first and second half year (total 24 sampling sites) were collected and analyzed for grain size, ignition loss, total organic carbon and heavy metal content. Surface sediments mainly composed of sand (coarse and medium sand) and fining changed from the first half to the second half of the year. Ignition loss, total organic carbon and heavy metals content increased in the second half of the year. Some heavy metals (Zn, Ni and Cu) were found to be at the lowest effect levels according to Ontario sediment quality guidelines. Additionally, most heavy metals were found to be at the non polluted level and level I according to USEPA sediment quality standards and National Institute of Environmental Research sediment pollution evaluation standard, respectively. The enrichment factor (< 1) and index of geoaccmulation (< 0) were non polluted in the study area. The correlation analysis results showed that ignition loss, total organic carbon and heavy metal content were highly correlated with grain size. Regarding changes in geochemical characteristics of surface sediments in the study area, grain size fine and organic matter and heavy metal content increased in the second half year. Nonetheless these results indicated pollution levels that did not adversely affect the benthos.

Keywords

References

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