Assessment of Metal Pollution of Road-Deposited Sediments and Marine Sediments Around Gwangyang Bay, Korea

광양만 내 도로축적퇴적물 및 해양퇴적물의 금속 오염 평가

  • JEONG, HYERYEONG (Marine Environmental Research Center, Korea Institute of Ocean Science & Technology (KIOST)) ;
  • CHOI, JIN YOUNG (Marine Environmental Research Center, Korea Institute of Ocean Science & Technology (KIOST)) ;
  • RA, KONGTAE (Marine Environmental Research Center, Korea Institute of Ocean Science & Technology (KIOST))
  • 정혜령 (한국해양과학기술원 해양환경연구센터) ;
  • 최진영 (한국해양과학기술원 해양환경연구센터) ;
  • 나공태 (한국해양과학기술원 해양환경연구센터)
  • Received : 2020.03.23
  • Accepted : 2020.05.19
  • Published : 2020.05.31


In this study, heavy metal in road-deposited sediments (RDS) and marine sediment around Gwangyang Bay area have been investigated to assess the pollution status of metals and to understand the environmental impact of RDS as a potential source of metal pollution. Zn concentration for <63 ㎛ size fraction was the highest (2,982 mg/kg), followed by Cr, Ni, Pb, Cu, As, Cd, and Hg. Metal concentrations in RDS increased with decreasing particle size and relatively higher concentrations were observed around the metal waste and recycling facilities. For particle size in RDS smaller than 125 ㎛, EF values indicated that Zn was very high enrichment and Cr, Cd, Pb were significant enrichment. The concentrations of metals in marine sediments were mostly below the TEL value of sediment quality guidelines of Korea. However, the Zn concentrations has increased by 30~40% compared to 2010 year. The amounts of Zn, Cd and Pb in less than 125 ㎛ fraction where heavy metals can be easily transported by stormwater runoff accounted for 54% of the total RDS. The study area was greatly affected by Zn pollution due to corrosion of Zn plating materials by traffic activity as well as artificial activities related to the container logistics at Gwangyang container terminal. The fine particles of RDS are not only easily resuspended by wind and vehicle movement, but are also transported to the surrounding environments by runoff. Therefore, further research is needed on the adverse effects on the environment and ecosystem.


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