폐광지역 오염토양의 생태 위해성 평가를 위한 지렁이 독성연구
Earthworm Toxicity Tests for Ecological Risk Assessment of Contaminated Soil in Abandoned Mine Areas
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초록
지렁이를 이용한 오염토양의 독성평가 기법은 표준화된 방법을 통해 수행되고 있다. 그러나, 중금속의 거동은 오염토양의 물리·화학적 특성에 의해 영향을 받으며, 따라서 토양 내 중금속의 생물학적 이용도는 오염토양의 현장특이성에 의해 조절됨이 규명되었다. 중금속의 독성에 대한 오염토양의 특성과 지표생물의 반응 특성 인자에 대한 연구가 수행되고 있으며, 이를 통해 오염토양 내 중금속 오염물질에 대한 독성을 예측할 수 있는 모델의 개발에 대한 연구가 수행되고 있다. 오염지역의 현장특이성을 고려한 생태독성평가는 중금속 거동에 대한 지구화학적 연구와 생태독성학적 연구를 통해 가능할 것이다.서론
Abstract
Earthworm toxicity tests are widely used to evaluate ecological risks of metal-contaminated soils. Many researches showed that the geochemical factors have significant effects on metal mobility or bioavailability and discussed that site-specific data should be taken into account to evaluate toxicity of metals in soils. Toxicity prediction model is being developed based on the geochemical factors that may play significant roles in the metal bioavailability in soils or uptake of earthworms. Geochemical approaches with ecotoxicological studies can lead more realistic toxicity assessment for contaminated sites.
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