Economic and Environmental Geology (자원환경지질)

The Korean Society of Economic and Environmental Geology (대한자원환경지질학회)
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Heavy Metal Contamination in Roadside Sediments within the Watershed of the Hoidong Reservoir in Busan City

부산시 회동저수지 집수분지 내 주요 도로변 퇴적물의 중금속 오염 평가

  • Youm Seung-Jun (Department of Geological and Environmental Hazards, Korea Institute of Geoscience and Mineral Resources) ;
  • Lee Pyeong-Koo (Department of Geological and Environmental Hazards, Korea Institute of Geoscience and Mineral Resources) ;
  • Yeon Kyu-Hun (Department of Geological and Environmental Hazards, Korea Institute of Geoscience and Mineral Resources) ;
  • Kang Min-Ju (Department of Geological and Environmental Hazards, Korea Institute of Geoscience and Mineral Resources)
  • 염승준 (한국지질자원연구원 지질환경재해연구부) ;
  • 이평구 (한국지질자원연구원 지질환경재해연구부) ;
  • 연규훈 (한국지질자원연구원 지질환경재해연구부) ;
  • 강민주 (한국지질자원연구원 지질환경재해연구부)
  • Published : 2005.06.01
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Abstract

Extractable concentrations (0.1 N & 1.0 N HCI) of heavy metals in roadside sediments are lower than guidelines for soil recommended by Ministry of Environment. Heavy traffic areas (such as No. 7 national road) show high contents of heavy metals, especially, at curved areas, gully pot, crackdown areas on overspeed, pedestrian crossing etc. Fine fractions $(<63\;{\mu}m)$ of roadside sediments have the highest concentrations of heavy metals, but mass loadings of heavy metal are determined by coarse fractions $(>100{\mu}m)$, due to washing out of fine fraction sediment by runoff water. Proper treatment facilities are needed to control the inflow of fine roadside sediments from No. 7 national road and bridge such as Hanmul bridge.

회동저수지 집수분지 내 주요 도로변 퇴적물의 중금속 함량은 토양오염 우려기준보다 낮게 나타났다 중금속함량이 높은 지역은 대부분 교통량이 많은 7번 국도이며 , 특히, 커브지점, 우수관, 과속단속 지점, 횡단보도 등에서 높은 함량을 보인다. 도로변 퇴적물 내 입도별 중금속 함량은 세립 입도($63{\mu}m$이하)일수록 높은 값을 보여주고 있으나, 총 함량은 조립 입도의 퇴적물($100{\mu}m$이상)에 의해 결정된다. 이는 우기 시에 유출수에 의해 세립 퇴적물이 주변 수계로 이동된 결과로 해석되며 수영강 및 회동저수지의 수질에 악영향을 미칠 수 있다. 따라서 교통량이 많은 7번 국도와 퇴적물이 쉽게 주변 수계로 유입될 수 있는 한물교와 같은 교량에서 퇴적물의 이동을 조절할 수 있는 적절한 처리시설이 요구된다.

Keywords

References

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