Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Geochemical Characteristics of Surface Sediments and an Evaluation of Trace Metal Pollution in Gomso Bay, Korea, 2011

2011년 곰소만 표층퇴적물의 지화학적 특성 및 중금속 오염도 평가

  • Kim, Chung-sook (Marine Environment Research Division, National Institute of Fisheries Science) ;
  • Kim, Hyung Chul (Marine Environment Research Division, National Institute of Fisheries Science) ;
  • Lee, Won Chan (South Sea Fisheries Research Institute, National Institute of Fisheries Science) ;
  • Hong, Sokjin (Marine Environment Research Division, National Institute of Fisheries Science) ;
  • Hwang, Dong-Woon (Marine Environment Research Division, National Institute of Fisheries Science) ;
  • Cho, Yoon-Sik (Tidal Flat Research Institute, National Institute of Fisheries Science) ;
  • Kim, Jin ho (Marine Environment Research Division, National Institute of Fisheries Science) ;
  • Kim, Sunyoung (Marine Environment Research Division, National Institute of Fisheries Science)
  • Received : 2017.09.04
  • Accepted : 2017.10.18
  • Published : 2017.10.31
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Abstract

To understand the geochemical characteristics of Gomso Bay, which features extensive Manila clam, we measured various geochemical parameters, organic matter, and trace metals (Cu, Cd, Pb, Zn, Cr, Hg, As and Fe) of intertidal and subtidal surface sediments in 2011. The surface sediments consisted of sedimentary facies including gravel (0.21%), sand (61.1%), silt (32.1%), and clay (6.5%). The chemical oxygen demand (COD) and acid volatile sulfide (AVS) values in most areas were below sediment quality criteria (COD, $20mg/g{\cdot}dry$; AVS, $0.2mg/g{\cdot}dry$). Trace metals in the surface sediments were below pollution thresholds, except for As (morderately polluted). Sediment quality was evaluated using the trace metal pollution load index (PLI) and ecological risk index (ERI), which showed that sediments were generally not polluted and at low risk; however, values along the outer bay were higher. We expect these results will be valuable for sustainable aquaculture prodution and environmental management in Gomso Bay.

Keywords

References

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