Journal of the Mineralogical Society of Korea (한국광물학회지)

The Mineralogical Society of Korea (한국광물학회)
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Characteristics of Precipitates and Geochemistry of Mine and Leachate Water in Janggun Mine

장군광산 갱내수와 침출수의 지화학적 및 침전물의 특성 연구

  • Kim, Jun Yeong (Korea Intrastructure Safety Corporation) ;
  • Jang, Yun Deug (Department of Geology, Kyungpook National University) ;
  • Kim, Yeong Hun (Department of environmental engineering, Andong National University) ;
  • Kim, Jeong Jin (Department of Earth and Environmental Sciences, Andong National University)
  • Received : 2014.08.22
  • Accepted : 2014.09.11
  • Published : 2014.09.30
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Abstract

The Janggun mine (Longitude $E129^{\circ}$ 03' 40", Latitude $N36^{\circ}$ 51' 19") was once operated as an underground mine and recently significant amount of mine and leachate water has been discharged from the mine adits and tailing dumps. Mine and leachate waters are characterized by neutral to weakly basic pH values (6.81-9.59). Major cations and anions have concentrations between 6.70-129.80 mg/L of Mg, 289.29-661.02 mg/L of Ca, 4.74-14.38 mg/L of Mn and 1205.00-2448.69 mg/L of $SO{_4}^{2-}$. Brownish yellow precipitates that found in the stream bottom consist of poorly crystallized 2-line ferrihydrite ($Fe_2O_3{\cdot}0.5H_2O$. Scanning electron microscope (SEM) photographs show that brownish yellow precipitates consisted of micro-sized granular particles of about $0.1{\mu}m$ in diameter. Semi-quantitative energy dispersive spectrometry (EDS) analyses show that these samples contained mainly Fe with minor Mn, Ca, Si and As.

경도 $E129^{\circ}$ 03' 40", 위도 $N36^{\circ}$ 51' 19"에 위치한 장군광산은 과거에 갱도채굴을 하였으며 현재에는 갱구와 광미로부터 갱내수와 침출수가 유출되고 있다. 갱내수와 침출수의 pH 값의 범위는 6.81-9.59로 중성내지 약염기성을 나타낸다. 주요 양이온과 음이온의 농도 범위는 Mg (6.70-129.80 mg/L), Ca (289.29-661.02 mg/L), Mn (4.74-14.38 mg/L), $SO{_4}^{2-}$ (1205.00-2448.69 mg/L) 등이다. 하천바닥에 침전된 황갈색의 침전물은 결정도가 아주 낮은 2-line 페리하이드라이트($Fe_2O_3{\cdot}0.5H_2O$로 구성되어 있다. 주사전자현미경 관찰결과 $0.1{\mu}m$ 정도의 구형의 미세입자로 구성되어 있으며 에너지분산분광분석에 의한 반정량 결과 주 구성원소는 Fe이며 그 외 소량의 Mn, Ca, Si, As 등을 포함하고 있다.

Keywords

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