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매체접촉형 폐기물의 환경성평가를 위한 컬럼 용출패턴 특성 KCI 등재

Characteristics of Column Elution Pattern for Environmental Assessment of Medium Contact Waste

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한국폐기물자원순환학회지 (Journal of Korea Society of Waste Management)
한국폐기물자원순환학회 (Korea Society Of Waste Management)
초록

Coal ash from power plants is divided into fly ash and bottom ash, which are produced after burning bituminous anthracite coal at 1,600°C. Coal ash is composed of fly ash (82%) and bottom ash (18%); while most fly ash is recycled as ready-mix concrete admixture and cement additive, bottom ash is left unused in landfill sites located within power plant grounds. This has been studied less comprehensively than fly ash; therefore, our aim was to assess the recyclability of the bottom ash generated by two (A & B) thermal power plants and thus identify the characteristics of hazardous substances in coal ash that are generated in power plants and evaluate the environmental contamination likelihood in the recycling of the produced coal ash. Currently, emitters such as thermal power plants have various requirements for the recycling of coal ash (bottom ash and they are also required by law to consider how the country’s environmental impact may be affected by recycling large amounts of coal ash. The concentrations of hazardous substances contained in coal ash (bottom ash) are generally lower than the criteria for soil contaminants and the standard for hazardous substances contained in designated waste. We found no significant leaching of heavy metal and its concentration; however, the levels of heavy metals in coal ash were generally low. The results of column leaching testing for potential environmental impact assessment indicated that increased leaching time might lead to the reduced ionic concentration of coal ash.

저자
  • 전태완 | Tae Wan Jeon Corresponding author
  • 박종은(국립환경과학원 환경자원연구부) | Jong Eun Park (Environmental Resource Research Department, National Institute of Environmental Research)
  • 강준구 | Jun Gu Kang
  • 손준익 | Jun Ik Son
  • 강영렬 | Young Yeul Kang
  • 홍수연 | Soo Youn Hong
  • 신선경 | Sun Kyoung Shin