Journal of the Korean GEO-environmental Society (한국지반환경공학회 논문집)

Korean Geo-Environmental Society (한국지반환경공학회)
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Distribution and Pollution Assessment of Heavy Metals in Surface Sediments Near Gwangan Bridge

광안대교 인근 퇴적토 중의 중금속 농도 및 오염도 조사 연구

  • Lee, Junho (Ship Practical Training Center, Pukyong National University) ;
  • Yang, Changgeun (Ship Practical Training Center, Pukyong National University) ;
  • Lee, Taeyoon (Department of Environmental Engineering, Pukyong National University)
  • Received : 2018.08.16
  • Accepted : 2018.10.24
  • Published : 2018.11.01
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Abstract

The main objective of this study was to analyse heavy metals in sediments obtained from Gwangan bridge and to evaluate pollution intensity of the sites. To evaluate pollution intensity of the sites, we used enrichment factor (EF), geoaccumulation index, potential ecological risk factor (PERF), and mean PEL quotient. Pollution intensities of these sites were evaluated by above methods, and we found most dangerous heavy metal and polluted sites. All sites showed non polluted or low risk for the heavy metals such as Cr, Cu, Ni, Pb, and Zn, but all sites were categorized as minor enrichment for Cd. G4 was evaluated as moderately polluted by Cd ($I_{geo}$) but other sites were unpolluted by heavy metals. In summary, Cd was found to be higher concentrations for all sites. For G4 and G5 sites, Pb and Zn in addition to Cd were higher than other sites.

본 연구는 광안대교 인근의 해저퇴적토에 포함된 중금속을 분석하여 퇴적토의 오염도를 평가하고자 하였다. 오염도 평가를 위해 Enrichment Factor(EF), Geoaccumulation index, Potential ecological risk factor(PERF), mean PEL quotient와 같은 평가방법을 사용하였다. 각 평가방법에 따라 대상 지역의 중금속 오염 정도를 확인하였고 이를 종합적으로 고려하여 어떤 지역에서 어떤 중금속이 문제가 되는지를 확인하였다. Cr, Cu, Ni, Pb, Zn의 경우 전 지역에서 비오염 혹은 영향없음으로 판별되었으나(EF<1) Cd의 경우에는 모든 지역에서 외부영향으로 인한 농도증가 양상을 보여주었다(1$I_{geo}$에 의한 평가에서는 Cd의 경우 G4에서 다소 오염으로 분류되었으나 다른 지역에서는 모두 비오염으로 평가되었다. 각 평가방법에 의한 결과를 요약하면 Cd의 경우 전 지역에서 높게 검출되었고 지역별로는 G4와 G5 지역에서 Cd를 비롯하여 Pb와 Zn의 농도가 다른 지역보다 다소 높은 것으로 확인되었다.

Keywords

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