Journal of the Mineralogical Society of Korea (한국광물학회지)

The Mineralogical Society of Korea (한국광물학회)
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Studies on Heavy Metal Dissolution Characteristics from Sediments of Andong Dam

안동댐 퇴적물의 중금속 용출 특성 연구

  • Seo, Jeong Min (Department of Earth and Environmental Sciences, Andong National University) ;
  • Kim, Young Hun (Department of Environmental Engineering, Andong National University) ;
  • Kim, Jeong Jin (Department of Earth and Environmental Sciences, Andong National University)
  • 서정민 (안동대학교 지구환경과학과) ;
  • 김영훈 (안동대학교 환경공학과) ;
  • 김정진 (안동대학교 지구환경과학과)
  • Received : 2019.12.05
  • Accepted : 2019.12.19
  • Published : 2019.12.30
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Abstract

In this study, X-ray diffraction, ICP analysis, and leaching experiments were performed to analyze the heavy metals and dissolution characteristics of Andong dam sediments. As a result of X-ray diffraction analysis, Andong dam sediment consists of quartz, plagioclase, chlorite and illite. ICP analysis of sediment showed very high concentrations of As and Cd. Leaching experiments were performed in aerobic and anaerobic condition in a disturbed state. The results of leaching experiment showed that more heavy metals were leached in aerobic than anaerobic conditions. Heavy metal that increased in concentration with time in aerobic conditions were Mn, Zn and Cd, and those in anaerobic conditions were Mn, Fe and As. The leaching ratio of heavy metal concentration in sediment was Mn > Cd > Zn > Ni > Cu > As > Pb ≒ Fe ≒ Cr and Mn > As > Cu > Ni > Zn > Pb ≒ Cd ≒ Fe ≒ Cr in aerobic and anaerobic conditions, respectively.

본 연구에서는 안동댐 퇴적물의 중금속 및 용출 특성을 분석하기 위하여 X-선 회절 분석, ICP 분석, 용출 실험을 수행하였다. X-선 회절 분석 결과 안동댐 퇴적물의 주구성 광물은 석영, 사장석, 녹니석, 일라이트이다. 퇴적물에 대한 ICP 분석 결과 비소와 카드뮴의 농도가 매우 높게 나타났다. 용출 실험은 교란 상태에서 호기성 및 혐기성 환경에서 수행하였다. 용출 실험 결과 혐기성보다 호기성 상태에서 더 많은 중금속이 용출되는 경향을 나타내었다. 호기성 상태에서 시간이 지남에 따라 농도가 증가하는 항목은 망간, 아연, 카드뮴이며 혐기성 상태에서는 망간, 철, 비소이다. 퇴적물 중금속 농도대비 용출비는 호기성 및 혐기성 환경에서 각각 Mn > Cd > Zn > Ni > Cu > As > Pb ≒ Fe ≒ Cr이며 Mn > As > Cu > Ni > Zn > Pb ≒ Cd ≒ Fe ≒ Cr이다.

Keywords

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