Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Distributions of Organic Matter and Trace Metals in Intertidal Surface Sediment from the Mokpo-Haenam Coast

목포-해남 연안 조간대 퇴적물중 유기물 및 미량금속 분포 특성

  • Hwang, Dong-Woon (Marine Environment Research Division, National Fisheries Research & Development Institute) ;
  • Kim, Pyoung-Joong (Southwest Sea Fisheries Research Institute, National Fisheries Research & Development Institute) ;
  • Jung, Rae-Hong (Marine Environment Research Division, National Fisheries Research & Development Institute) ;
  • Yoon, Sang-Pil (Coastal Wetland Research Institute, National Fisheries Research & Development Institute)
  • Received : 2013.05.09
  • Accepted : 2013.07.16
  • Published : 2013.08.31
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Abstract

To evaluate the organic matter and trace metal pollution in intertidal sediment of the coastal zone, various geochemical parameters (grain size, ignition loss [IL], chemical oxygen demand [COD], acid volatile sulfide [AVS], and metals [Al, Fe, Cu, Pb, Zn, Cd, Cr, Mn, Hg, and As]) were measured for the intertidal surface sediment of the mainland and islands between Mokpo and Haenam in the southwestern coast of Korea. The surface sediments consist mainly of finer sediments, such as mud and silt. The concentrations of IL, COD, and trace metals in intertidal sediment were relatively high in the shoreline of the mainland than in that of islands and those in some stations exceeded the sediment quality guidelines (SQGs). Moreover, the concentrations of IL, COD, and trace metals (except As) in sediment showed relatively good positive correlations with mean grain size, indicating that the concentrations of organic matter and trace metals in intertidal sediment of the study region are dependent on grain size of sediment. Pollution evaluation for trace metals using geochemical assessment techniques, such as enrichment factor, geoaccumulation index, and SQGs, suggested that the intertidal sediments in the study region show light pollution with Cr and moderate pollution with As. More extensive interdisciplinary studies are required to determine the potential causes of As pollution in intertidal sediment.

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