Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Geochemical Characteristics and Pollution Assessment of Surface Sediments in the Nakdong River Estuary

낙동강 하구 표층 퇴적물의 지화학적 특성 및 오염도 평가

  • Jeon, Hye-Lyn (Nakdong River Environment Research Center, National Institute of Environmental Research) ;
  • Lee, Hye-Yun (Nakdong River Environment Research Center, National Institute of Environmental Research) ;
  • Yang, Deuk-Seok (Nakdong River Environment Research Center, National Institute of Environmental Research) ;
  • Kim, Shin (Nakdong River Environment Research Center, National Institute of Environmental Research)
  • 전혜린 (국립환경과학원 낙동강물환경연구소) ;
  • 이혜윤 (국립환경과학원 낙동강물환경연구소) ;
  • 양득석 (국립환경과학원 낙동강물환경연구소) ;
  • 김신 (국립환경과학원 낙동강물환경연구소)
  • Received : 2021.05.03
  • Accepted : 2021.06.14
  • Published : 2021.06.30
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Abstract

To evaluate the geochemical characteristics and assess the pollution in surface sediments of the Nakdong River estuary, two sites adjacent to the estuary bank (Hh1 and Hh2) and one site at the upper part of the estuary bank (Hh3) were investigated. The surface sediments were analyzed for their contents of metals (Cu, Pb, Ni, Cr, Zn, and Al), organic matter (IL, COD, TOC, and TN), and grain size from 2018 to 2020. As a result of the pollution assessment, there was little anthropogenic contamination by most of the metals. The surface sediments in Hh2 had comparatively abundant silt and clay, whereas the other sites were mainly composed of sand. The organic index and contents of organic matter were highest at Hh2. Multivariate statistical analyses (cluster analysis and Pearson correlation analysis) showed that the contents of organic matter and pollution were associated with fine sediment. These results suggest that the geochemical characteristics were changed by the estuary bank built in the research area and that the increase in fine sediment attributable to the low-energy environment resulted in an increase in organic matter pollution.

Keywords

Acknowledgement

본 논문은 환경부의 재원으로 국립환경과학원의 지원을 받아 수행하였습니다(NIER-2021-01-01-042).

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