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Estimation of Contamination Level of Sediments at the Below of Busan Gwang-an Bridge

부산 광안대교 하부 퇴적토 오염도 평가

  • Kim, Seog-Ku (Environmental Engineering Research Disision, Korea Institute of Construction Technology) ;
  • Ahn, Jae-Whan (Environmental Engineering Research Disision, Korea Institute of Construction Technology) ;
  • Kang, Sung-Won (Environmental Engineering Research Disision, Korea Institute of Construction Technology) ;
  • Yun, Sang-Leen (Environmental Engineering Research Disision, Korea Institute of Construction Technology) ;
  • Lee, Jungwoo (Environmental Engineering Research Disision, Korea Institute of Construction Technology) ;
  • Lee, Jea-Keun (Department of Environmental Engineering, Pukyong National University) ;
  • Lim, Jun-Heok (Department of Chemical Engineering, Pukyong National University) ;
  • Kim, Dong-Soo (Department of Environmental Engineering, Pukyong National University) ;
  • Lee, Tae-Yoon (Department of Environmental Engineering, Pukyong National University)
  • 김석구 (한국건설기술연구원 환경연구실) ;
  • 안재환 (한국건설기술연구원 환경연구실) ;
  • 강성원 (한국건설기술연구원 환경연구실) ;
  • 윤상린 (한국건설기술연구원 환경연구실) ;
  • 이정우 (한국건설기술연구원 환경연구실) ;
  • 이제근 (국립부경대학교 환경공학과) ;
  • 임준혁 (국립부경대학교 화학공학과) ;
  • 김동수 (국립부경대학교 환경공학과) ;
  • 이태윤 (국립부경대학교 환경공학과)
  • Received : 2013.10.07
  • Accepted : 2013.10.23
  • Published : 2013.11.30

Abstract

In this study, physical properties and heavy metal contents of sediments obtained from the bottom of Gwangan bridge were measured to determine pollution level of the sediments. From the results of the oxide contents of the sediments, $SiO_2$ was decreased as the sampling points became more distant from the stream of river. On the contrary, CaO showed opposition aspect to $SiO_2$. Ignition loss of sediments ranged from 7.2 and 14.3% and 0.9 and 5.5% for TOC. For EPA guidelines of ignition loss, all sampling points were classified as heavily polluted areas. When TOC was considered, all areas were classified as lowest effect level except for GW7 where classified as no effect level. All areas were free of heavy metal contamination evaluated by USEPA and Canadian guidelines. However, all areas were classified as heavily contaminated areas due to the high value of ignition loss when USEPA was used.

본 연구는 광안대교 하부의 퇴적토 오염조사를 위해 퇴적토의 기본물성 및 중금속 함량을 측정하였다. 퇴적물 시료의 산화물을 분석한 결과, $SiO_2$와 CaO의 경우 강하구에서 멀어 질수록 $SiO_2$는 증가하고 CaO는 감소하는 경향을 보였다. 강열감량의 경우, 7.2~14.3%의 분포를 보여 비교적 높은 값을 나타내었고 TOC는 0.9~5.5%로 지역에 따라 편차가 큰 것을 알 수 있었다. 이는 USEPA 퇴적물환경기준(비오염, 중간오염, 심한오염)에 따라 심한오염으로 평가되었고, TOC의 경우, 강하구에서 가장 먼 시료채취 지점(GW7)은 영향없음으로 평가되었고 나머지 지역은 최소영향수준으로 평가되었다. 중금속의 경우에는 USEPA와 캐나다 기준으로 평가하였을 때 모두 비오염으로 평가되어 중금속에 대한 오염도는 없는 것으로 평가되었다. 다만, 강열감량의 값이 크기 때문에 USEPA 기준으로 평가할 때 중금속의 오염은 없지만 전체적으로는 심한 오염으로 평가되었다.

Keywords

References

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