자원환경지질 (Economic and Environmental Geology)

  • 제53권6호
  • /
  • Pages.781-792
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  • 2020
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  • 1225-7281(pISSN)
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  • 2288-7962(eISSN)
대한자원환경지질학회 (The Korean Society of Economic and Environmental Geology)
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선광잔류물의 친환경적 처리 기술: 심해저광물자원개발시 발생하는 선광잔류물 특성 연구

Environment-friendly Processing Technologies of Mine Tailings: Research on the Characteristics of Mine Tailings when Developing of Deep Sea Mineral Resources

  • 문인경 (한국해양과학기술원 심해저광물자원연구센터) ;
  • 유찬민 (한국해양과학기술원 심해저광물자원연구센터) ;
  • 김종욱 (한국해양과학기술원 심해저광물자원연구센터)
  • Moon, Inkyeong (Deep-sea and Seabed Mineral Resources Research Center, Korea Institute of Ocean Science and Technology) ;
  • Yoo, Chanmin (Deep-sea and Seabed Mineral Resources Research Center, Korea Institute of Ocean Science and Technology) ;
  • Kim, Jonguk (Deep-sea and Seabed Mineral Resources Research Center, Korea Institute of Ocean Science and Technology)
  • 투고 : 2020.10.12
  • 심사 : 2020.12.21
  • 발행 : 2020.12.28
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초록

망간단괴, 망간각, 해저열수광상 개발에서 필연적으로 발생하게되는 선광잔류물은 방대한 양과 잠재적인 독성으로 인해 관심이 증가하고 있지만, 아직까지 선광잔류물의 발생량, 물리·화학적 특성, 환경 유해성, 해양생태계에 미치는 영향 등에 관한 정보가 부족한 실정이다. 최근에는 선광잔류물의 친환경적인 처리 중요성이 인식되고, 그에 따른 저감/처리법이 강구되고 있다. 심해저 광물자원개발 시 선광잔류물이 선상에서 처리되지 못할 경우, 선광잔류물의 육상으로 운반 비용이 발생하고 육상 환경오염 문제를 해결해야하는 경우가 발생하게 된다. 따라서, 한국해양과학기술원에서는 1) 오염인자/환경영향, 2) 환경/생물 위해성 영향, 3) 입자 확산, 4) 선광, 5) 저감/처리(정화)를 친환경적인 선상에서의 선광잔류물 처리를 위한 주요 핵심 요소로 구분하여 선광잔류물의 유해성, 해양생태계에 미치는 영향, 오염 입자 확산 모델, 선광 및 정화처리 후보기술 등에 대한 연구를 수행하고 있다. 본 연구 결과는 향후 심해저광물자원 개발과정에서 발생할 수 있는 환경영향에 대한 과학적인 증거 확보를 통해 환경문제를 최소화 할 수 있는 연구 기반을 제시할 수 있고, 이는 다른 기원의 오염물 및 규제없이 방치되고 있는 육상 폐광산의 누출수 처리에도 적용할 수 있을 것이라 기대한다.

Mine tailings, which are inevitably formed by the development of manganese nodules, manganese crusts, and hydrothermal seafloor deposits, have attracted attention because of their quantity and potential toxicity. However, there is a lack of data on the quantity of mine tailings being generated, their physicochemical properties, and their effects as environmental hazards and on marine ecosystems in general. The importance of treating mine tailings in an environmentally friendly manner has been recognized recently and related reduction/treatment methods are being considered. In the case of deep-sea mineral resource development, if mine tailings cannot be treated aboard a ship, the issue becomes one of the cost of transporting them to land and solving the problem of environmental pollution there. Therefore, the Korea Institute of Ocean Science and Technology conducted research on the harmfulness of mine tailings, their effect on marine ecosystem, the diffusion model of contaminated particles, and candidate purification treatment technologies based on five representative controlling factors: 1) effects of pollution /on the environment, 2) effects of environmental/ biological hazards, 3) diffusion of particles, 4) mineral dressings, and 5) reducing/processing mine tailings. The results of this study can provide a basis for minimizing environmental problems by providing scientific evidences of the environmental effects of mine tailings. In addition, it is also expected that these results could be applied to the treatment of pollutants of different origins and at land-based mining waste sites.

키워드

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