Journal of the Korean GEO-environmental Society (한국지반환경공학회 논문집)

Korean Geo-Environmental Society (한국지반환경공학회)
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Evaluation for Contents of Contaminants and Leaching Characteristics of Bottom Ash

바텀애쉬의 유해물질 함량 측정 및 용출특성 평가연구

  • 고태훈 (한국철도기술연구원 신소재틸팅열차시스템연구단) ;
  • 이성진 (한국철도기술연구원 철도구조연구실) ;
  • 신민호 (한국철도기술연구원 철도구조연구실) ;
  • 김병석 (부경대학교 환경해양대학 환경공학과 대학원) ;
  • 이제근 (부경대학교 환경해양대학 환경공학과) ;
  • 이태윤 (부경대학교 환경해양대학 환경공학과)
  • Received : 2010.03.17
  • Accepted : 2010.04.28
  • Published : 2010.06.01
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Abstract

In this study, we tried to determine any detrimental effects on water quality when bottom ash obtained from a coal-fired power plant intended to be used as a fill material in construction sites. Physical-chemical properties of bottom ash were determined using proximate analysis, elemental analysis, XRD, and XRF. Classification of bottom ash as a waste material and soil contamination due to the use of bottom ash were performed by Korea waste standard leaching test and soil toxicity test, respectively. Results of leaching tests were compared to the regulations for water quality and groundwater quality and no harmful effects on water quality were found. Most of heavy metals in leachate were below detection limits but trace amount of $Cr^{6+}$ was found. However, concentration of $Cr^{6+}$ was below the regulation criteria. Column leaching tests indicated that concentrations of Pb and Zn were slightly higher than regulations but below regulations within 1 PVE, but concentrations of sulfate were 10 times higher than regulation and thus, the required time to reach regulation was almost 8 PVE.

본 연구에서는 화력발전소에서 발생한 바텀애쉬를 성토재로 사용하기 전 환경에 미치는 영향을 평가하고자 하였다. 바텀애쉬에 대한 기본 물성치는 공업분석, 원소분석, XRD, XRF를 통해 구하였고, 폐기물 용출실험, 토양오염 공정실험을 통해 바텀애쉬에 대한 폐기물 분류 및 토양오염 가능성을 평가하였다. 위 용출실험 결과는 국내 수질환경기준 및 지하수 수질기준과 비교하였고 수질오염의 가능성은 없는 것으로 평가되었다. 측정된 대부분의 중금속은 검출한도 이하였으며 $Cr^{6+}$의 경우 미량이 검출되었으나 기준치 이하였다. 컬럼실험에서는 Pb, Zn 및 황산염이 기준치를 초과하였으나, Pb과 Zn은 1 PVE 전에 모두 기준치 이하로 감소하였고 황산염은 기준치 이하로 감소하는데 최대 8 PVE의 시간이 소요되었다. 중금속의 경우 대부분이 기준치 이하이므로 문제가 없으나 황산염은 기준치를 10배 정도 초과하므로 사용에 주의를 요한다.

Keywords

Acknowledgement

Supported by : 기상청

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