Journal of the Mineralogical Society of Korea (한국광물학회지)

The Mineralogical Society of Korea (한국광물학회)
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Heavy Metal Uptake of Acacia from Tailing soil in Abandoned Jangun Mine, Korea

장군광산 광미 토양으로부터 아카시아의 중금속 전이에 관한 연구

  • Jeong, Hong-Yun (Korea Atomic Energy Research Institute) ;
  • Kim, Young-Hun (Department of Environmental Engineering, Andong National University) ;
  • Kim, Jeong-Jin (Department of Earth and Environmental Sciences, Andong National University)
  • Received : 2015.06.10
  • Accepted : 2015.06.25
  • Published : 2015.06.30
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Abstract

Janggun mine (longitude $129^{\circ}$ 03'38.91" Latitude $36^{\circ}$ 51'31.59") had been operated as an underground mine for last few decades. As the part of the remediation process, the surface of tailing dump was covered with uncontaminated soil about 20 cm in depth and acacia trees were planted. Heavy metal uptake of acacia from tailing soil has continued for the past 15 years. Heavy metal concentration ranges of tailing soil that contaminated with As (66.43-9325.34 mg/kg), Cd (0.96-1.09 mg/kg), Cu (16.90-57.60 mg/kg), Pb (57.33-945.67 mg/kg), and Zn (154.48-278.61 mg/kg) have higher than those of control soil As (38.98 mg/kg), Cd (0.42 mg/kg), Cu (10.26 mg/kg), Pb (8.21 mg/kg), Zn (46.74 mg/kg). The As, Cd, Cu, Pb and Zn concentrations of leaf of acacia in highly contaminated tailing dump were 165.95, 0.04, 10.68, 3.18, 48.11 mg/kg, respectively. The metal contents of leaf of acacia tree that obtained from uncontaminated control soil are 1.31 of As, 3.90 of Cu, 0.22 of Pb and 11.01 mg/kg of Zn. It was investigated that in the acacia tree, heavy metals such as As, Cu, Pb and Zn tend to be more highly concentrated in bark and leaf, compared with sapwood and heartwood.

장군광산은 과거 갱도채굴한 폐금속광산으로 위치는 $N36^{\circ}$ 51'31.59", $E129^{\circ}$ 03'38.91"에 위치하고 있다. 산사면에 적치해 놓은 광미 적치장은 상부에 오염되지 않은 토양으로 약 20 cm 정도 복토한 후 아카시아를 식재해 놓은 상태이다. 광미 적치장에 식재해 놓은 아카시아는 대략 15년생 정도이다. 광미 적치장에서 채취한 토양시료의 중금속 농도는 As (66.43-9325.34 mg/kg), Cd (0.96-1.09 mg/kg), Cu (16.90-57.60 mg/kg), Pb (57.33-945.67 mg/kg), Zn (154.48-278.61 mg/kg)으로 비오염 토양인 대조군의 As (38.98 mg/kg), Cd (0.42 mg/kg), Cu (10.26 mg/kg), Pb (8.21 mg/kg), Zn (46.74 mg/kg) 보다 훨씬 높다. 가장 오염도가 높은 토양에 식재된 아카시아의 잎에서의 As, Cd, Cu, Pb, Zn의 농도는 각각 165.95, 0.04, 10.68, 3.18, 48.11 mg/kg이다. 비오염 토양에 식재되어 있는 아카시아의 잎에서의 중금속 농도는 As 1.31mg/kg, Cu 3.90 mg/kg, Pb 0.22 mg/kg, Zn 11.01 mg/kg이다. 아카시아에서의 중금속의 농집도는 껍질과 잎에서 높으며 심재와 변재에서 낮은 경향을 나타낸다.

Keywords

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