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NTIS 바로가기자원환경지질 = Economic and environmental geology, v.48 no.4, 2015년, pp.337 - 349
권지철 (서울대학교 농생명과학공동기기원(NICEM)) , 박현정 (서울대학교 농생명과학공동기기원(NICEM)) , 정명채 (세종대학교 에너지자원공학과)
This study has focused on investigation of correlation for As and heavy metals in paddy soil and rice crops sampled in the vicinity of the abandoned Munmyung Au-Ag mine. Soil samples extracted by various methods including aqua regia, 1 M
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핵심어 | 질문 | 논문에서 추출한 답변 |
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토양의 중금속 오염의 원인은 무엇인가? | 토양의 중금속 오염은 광산개발을 포함한 산업활동, 화학비료 및 농약, 산업폐수, 하수슬러지와 같은 중금속이 풍부한 물질들을 농업에 부적절하게 사용한 인류활동의 결과로서 수십 년간 전 세계적으로 농업생산에 심각한 문제가 되었다(Ramadan and Al-Ashkar, 2007;Kuo et al., 2006). | |
국내 생물유효도 평가 방법의 문제점은? | 농경지토양의 경우 토양 특성, 금속의 화학종 및 식물 종류, 특히 토양과 식물의 반응은 토양 내에 함유된 금속의 생물유효도(bioavailability)에 의해 결정되며(Ehlkenand Kirchner, 2002), 간단하고 사용이 용이한 다양한 추출방법 등이 생물유효도 평가에 자주 사용된다. 하지만 국내의 경우 원소의 총량에 따른 농도에 기반을 두고 토양과 식물의 상호관계를 규명하는데 다소 어려움 있다. 물론 총량 방법은 금속의 다양한 화학종 또는 고체상이 다르고 복잡하기 때문에 위해성 평가에는 좋은 방법으로 알려져 있지만, 생물유효도를 평가함에 있어 한계점이 있다(Chen et al. | |
조사결과 국내 휴·폐광산 주변 농경지 토양에는 어떤 문제점이 있었는가? | ,2009). 대표적으로 국내에 산재되어 있는 휴·폐광산에 대한 정밀조사 결과, 광산폐기물 및 광산 주변에 있는 농경지 토양의 80% 이상이 As 또는 중금속으로오염된 것으로 조사되었다(KMOE, 2005; 2007;2013). 이렇게 오염된 농경지 토양은 농작물에 영향을 미쳐 이를 섭취한 주민의 건강에 심각한 문제를 발생시킬 수 있다(Jung and Jung, 2006). |
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