Journal of the Mineralogical Society of Korea (한국광물학회지)

The Mineralogical Society of Korea (한국광물학회)
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Adsorption Characteristics of As, Cu, and Cd Using Precipitates from Dalseong Mine

달성광산 산성광산배수 침전물에 대한 As, Cu, Cd 흡착 특성 연구

  • Byun, Hyun Suk (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)
  • 변현숙 (안동대학교 지구환경과학과) ;
  • 김영훈 (안동대학교 환경공학과) ;
  • 김정진 (안동대학교 지구환경과학과)
  • Received : 2017.11.13
  • Accepted : 2017.12.26
  • Published : 2017.12.30
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Abstract

For evaluation of adsorption characteristics of heavy metals, precipitates were collected from stream bottom in the Dalseong mine. The removal of some heavy metals such as As, Cu, and Cd from aqueous solution is studied using a precipitates taken from acid mine drainage. The yellowish brown (Munsell color 8.75YR 5/10) and dark brown (Munsell color 2.5YR 3/8) precipitates that collected from the study area consist mainly of schwertmannite and goethite, respectively. The percentage removal or adsorption capacity of metals depends on the initial concentration and characteristics of adsorbent. Removal efficiency of the adsorbents shows the order for metal ions of As > Cu > Cd. The adsorption efficiency by absorbent of precipitates in low concentration metal aqueous solution were observed 67.00-85.00% for As, 26.24-29.08% for Cd, and 7.67-12.82% for Cu. As the initial concentration of metal ions was increased from 1 to 10 mg/L, adsorption amount of adsorbent increased from 0.29 to 1.29 mg/g of Cu of schwertmannite, and from 0.24 to 1.97 mg/g of goethite.

달성광산 주변 하천에서 채취한 시료를 이용하여 중금속 흡착 특성 평가를 수행하였다. 수용액 내에 존재하는 As, Cu, Cd를 대상으로 산성광산배수 침전물을 이용하여 중금속 제거 실험을 수행하였다. 중금속 흡착 물질의 주 구성광물은 황갈색(Munsell color 8.75YR 5/10)의 schwertmannite와 흑갈색의 (Munsell color 2.5YR 3/8) 침철석이다. 흡착 물질에 의한 흡착 제거 효율과 흡착량은 수용액 내의 중금속의 초기 농도와 흡착물질의 특성에 의해 좌우된다. 달성광산에서 채취한 침전물에 의한 중금속 흡착 효율은 As > Cu > Cd 순으로 나타낼 수 있다. 저농도일 때 침전물에 의한 흡착 제거 효율은 As 67.00-85.00%, Cd 26.24-29.08%, Cu 7.67-12.82% 정도이다. Cu의 초기 농도가 1 mg/L와 10 mg/L일 때, 흡착 물질이 schwertmannite인 경우 흡착량은 0.29와 1.29 mg/g이며, 침철석인 경우 0.24-1.97 mg/g으로 초기 농도가 높거나 흡착 물질이 침철석인 경우 흡착량이 더 높게 나타난다.

Keywords

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