Clean Technology (청정기술)

The Korean Society of Clean Technology (한국청정기술학회)
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Biochar for soil carbon sequestration

토양탄소격리를 위한 바이오차

  • Woo, Seung Han (Department of Chemical and Biological Engineering, Hanbat National University)
  • 우승한 (한밭대학교 화학생명공학과)
  • Received : 2013.05.08
  • Accepted : 2013.09.27
  • Published : 2013.09.30
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Abstract

Biochar is charred materials generated during pyrolysis processes in the absence of oxygen using biomass, resulting in high carbon contents. In recent years, biochar has attracted more increasingly due to its potential role in carbon sequestration, renewable energy, waste management, soil amendment for agricultural use, and environmental remediation. Since biochar has a long-term stability in soil for thousands of years, biochar can be carbon negative compared to carbon-neutral biomass energy that decomposes eventually. Moreover, when biochar is applied to soil, crop production can be largely improved due to its high pH and its superior ability to retain water and nutrients. This paper review the research trends of biochar including the principles of carbon sequestration by biochar, its physico-chemical properties, and its applications on agricultural and environmental area.

바이오차는 바이오매스를 이용하여 산소가 없는 환경에서 열분해할 때 만들어지는 탄소함량이 높은 고체 물질이다. 바이오차의 탄소격리, 재생 에너지, 폐기물 관리, 농업 생산성 개선, 환경복원 관점에서의 중요한 기능으로 인해 최근에 크게 주목을 받고 있다. 바이오차는 토양에서 수천 년간 안정적으로 보존될 수 있기 때문에, 결국에는 분해될 수 밖에 없어 탄소중립이라 불리는 바이오매스 에너지와는 달리 탄소 네가티브의 특징을 가지고 있다. 게다가 바이오차를 토양에 적용하면 바이오차의 높은 pH와 물 및 영양분의 우수한 보유능으로 인해 농업 생산성이 크게 개선될 수 있다. 본 논문은 바이오차의 탄소격리 원리와 물리화학적 특징, 농업 및 환경에의 적용과 관련된 최근의 연구 동향을 총설하여 기술하고자 한다.

Keywords

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