Clean Technology (청정기술)

The Korean Society of Clean Technology (한국청정기술학회)
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Environmental Impacts Assessment of ITO (Indium Tin Oxide) Using Material Life Cycle Assessment

물질전과정평가(MLCA)를 통한 투명전극 ITO (Indium Tin Oxide)의 환경성 평가

  • Lee, Soo-Sun (Department of Materials Science and Engineering/Research Center for Sustainable ECo-Devices and Materials (ReSEM), Korea National University of Transportation) ;
  • Lee, Na-Ri (Department of Materials Science and Engineering/Research Center for Sustainable ECo-Devices and Materials (ReSEM), Korea National University of Transportation) ;
  • Kim, Kyeong-Il (Department of Materials Science and Engineering/Research Center for Sustainable ECo-Devices and Materials (ReSEM), Korea National University of Transportation) ;
  • Hong, Tae-Whan (Department of Materials Science and Engineering/Research Center for Sustainable ECo-Devices and Materials (ReSEM), Korea National University of Transportation)
  • 이수선 (한국교통대학교 신소재공학과/친환경 에너지 변환.저장소재 및 부품개발 연구센터) ;
  • 이나리 (한국교통대학교 신소재공학과/친환경 에너지 변환.저장소재 및 부품개발 연구센터) ;
  • 김경일 (한국교통대학교 신소재공학과/친환경 에너지 변환.저장소재 및 부품개발 연구센터) ;
  • 홍태환 (한국교통대학교 신소재공학과/친환경 에너지 변환.저장소재 및 부품개발 연구센터)
  • Received : 2011.12.27
  • Accepted : 2012.02.04
  • Published : 2012.03.30
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Abstract

In this study, we executed an environmental impact assessment about recycling of ITO (Indium Tin Oxide), used for touch panel. ITO is mainly used to make transparent conductive coatings for touch and flat screen LCD (Liquid Crystal Display), ELD (Emitting Light Device), PDP (Plasma Display Panel). This demand is increasing little by little. but form current status, ITO is discarded than recycling. It is important to recycling ITO for national strategies about resource conservation, and reduce environmental burden. Also Landfill or incineration of ITO cloud be harmful to the human health in the long-term. Material Life Cycle Assessment method (MLCA) was conducted for comparison landfill and recycling of ITO. MLCA would provide more information for environmental issues and potential environmental impacts of ITO. The study includes two scenarios, the basic scenario is recycling of ITO (10, 20, 30%) and the other scenario is landfill of ITO. In addition, amount of carbon dioxide and energy were calculated.

본 연구에서는 휴대용 기기의 터치스크린에 사용된 ITO (Indium Tin Oxide) 투명전극의 재활용에 대한 환경성 평가를 실시하였다. ITO 전극의 경우 도전성과 함께 투명성을 가지는 재료로서 터치 패널이나 LCD (Liquid Crystal Display), ELD (Emitting Light Device), PDP (Plasma Display Panel) 등 각종 디스플레이 장치의 제조를 위한 투명전극으로 수요가 증가하는 추세이다. 특히 인듐과 같은 희소금속을 함유하고 있기 때문에 국가 전략적으로 반드시 재활용되어야 한다. 또한 매립이나 폐기시 발생하는 환경오염 및 인간에게 미치는 영향도 고려해야 한다. 이에 대해 Material Life Cycle Assessment (MLCA)를 이용하여 ITO를 재활용과 매립의 두 가지 처리방법에 따른 환경부하를 정량적으로 분석하고자 한다. 또한 이산화탄소 배출과 투입된 에너지량도 계산하였다. 재활용은 폐 디스플레이에 포함된 ITO의 10, 20, 30%를 회수했을 때를 기준으로 한다.

Keywords

References

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