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준설물질 유효활용 및 처분을 위한 평가에 있어 생체지표 활용의 재고

Significance of Biomarkers in the Assessment of Dredged Materials for Beneficial Reuses and Disposal

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참고문헌

키워드

주제분류환경공학

초록

준설은 수저퇴적물을 관리하는 데에 있어 유용한 공법 중 하나로 수심유지, 수환경관리 등 다양한목적으로 사용되며 준설사업에서 발생되는 수저준설물질(주로 토사 성분)은 임의로 폐기물로 간주되어 폐기물 배출해역에 투기되어왔다. 그러나 준설물질은 여러 목적의 토목사업의 재료로 사용할 수 있기 때문에 준설물질을 자원화할 수 있도록 제도적으로 보장해 줄 필요성이 대두되고 있다. 최근 퇴적물을 평가하는 데에 있어 기존의 오염물질 함량 기준이 생물 영향과 직접 연관되지 않는 한계를 극복하기 위해 생체지표 연구가 수행되고 있다. 생체지표는 오염물질의 노출과 영향을 진단하는 지표로서 다양한 연구에 유용하게 사용될 수 있다. 본 논문에서는 퇴적물의 위해성 평가에 있어 생체지표를 활용하는 것이 가지는 장점을 보여주고 생체지표를 활용한 해양퇴적물의 오염 및 건강성 그리고 준설물질의 처리와 유효활용을 위한 의사결정에 있어 그 유용성을 보여주고자 한다.

Abstract

Dredging is inevitably necessary for the management of water infrastructure such as waterways and polluted bottom sediment. Dredged material management options may be offshore dumping, wetland creation, beach nourishment and various other engineering uses depending on the given circumstances at the time of dredging. Among those options, wetland creation and beach nourishment are the preferred ones in Korea considering significant loss of wetland and beach erosion due to various development projects along the coastal region. In order to use dredged material beneficially, however, dredged material needs to be assessed its suitability with respect to its engineering purpose and environmental criteria. In this paper, we demonstrate that environmental risk of dredged material to be introduced into the marine environment can be easily assessed using biomarkers with relative low cost. Biomarkers can also compliment pollutant contents analysis that may not be specific to their impact on biological response. Biomarker information may be used to assist decision making process in selecting suitable treatment or beneficial use options for dredged materials.

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