• 한국응용과학기술학회지
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• 제21권3호
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• pp.252-258
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• 2004

This study was performed to evaluate characteristic of acid mine drainages (AMD) from abandoned mines in Kangwon-Do. Youngdong abandoned mine, and Soo and Hambaek abandoned mines in Hamtae were selected for this study. Average pHs of the mine drainages were 3-6.5, and those of Youngdong and Hambaek drainages were very acidic as 3-4. $SO_4^{-2}$ of Youngdong and Hambaek drainages were over 1,600 mg/L, which higher than average value (845 mg/L) of acid mine drainages in nationwide. Cu, Mn, and As concentrations of the drainages were lower than ‘Pollutant Discharge Permission'. Fe concentrations of Youngdong and Hambaek drainages were approximately 96 mg/L, which were two times higher than average value in nationwide. From correlation analysis using SPSS, significant correlation was not discovered between 'contaminants' analyzed in three acid mine drainages.

• 자원환경지질
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• 제36권2호
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• pp.103-109
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• 2003

동해탄광 지역의 산성광산배수에는 Ca, SO$_4$, Mg, Al의 함량이 높게 나타난다. 이 일대의 산성광산배수를 증발시켰을 때 생성된 증발잔류물에서는 주로 석고(CaSO$_4$${\cdot}$2$H_2O$)가 생성되었으며 그 외에 소량의 알루노겐(Al$_2$(SO$_4$)$_4$${\circ}$17$H_2O$) 과 헥사하이드라이트(MgSO$_4$${\circ}$6$H_2O$)가 형성되었다. 석고를 형성하는 Ca는 주변의 모암속에 포함된 방해석에서, SO$_4$ 는 폐석에 포함된 황철석에서 기원한 것으로 생각된다. 함수 알루미늄황산염광물인 알루노겐은 침상의 결정으로 나타난다. 하천수의 Al은 모암이나 폐석에 포함된 엽납석, 일라이트, 녹니석과 같은 층상규산염광물의 화학적 용해작용에 의해 부과된 것으로 추정된다. 함수 마그네슘황산염광물인 헥사하이드라이트는 침상이나 섬유상의 결정으로 생성되었으며 Mg의 기원은 모암내의 돌로마이트와 광산폐셔의 주 구성광물인 녹니석으로 판단된다.

• 한국지하수토양환경학회지:지하수토양환경
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• 제26권1호
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• pp.34-44
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• 2021

Acid mine drainage (AMD) resulting from pyrite oxidation in mining areas, subsequently leads to soil acidification accompanied by lowering pH and high concentration of metals and metalloids in its surrounding environment. Regarding to this, the microbial amelioration has been considered as a promising option for a more cost-effective and eco-friendlier countermeasure, compared to the use of alkaline chemicals. This study was aimed to evaluate influencing factors in microbially-mediated amelioration of acidic soil spiked by simulated AMD. For this, microcosm experiments were conducted by acid-neutralizing bacterial consortium (dominated by Klebsiella sp. and Raoultella sp.) under the various conditions of AMD spikes (0-2,500 mg SO42-/L), together with acidic mine soil (0-100 g) or sphagnum peat (0-5 g) in the 200 mL of nutrient medium. The employed bacterial consortium, capable of resisting to high level of sulfate concentration (up to 1,500 mg SO42-/L) in low pH, generated the ammonium while concomitantly reduced the sulfate, subsequently contributing to the effective soil stabilization with an evolution of soil pH up to neutral. Furthermore, it demonstrates that suitable condition has to be tuned for successful microbial metabolism to facilitate with neutralization during practical application.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2004년도 총회 및 춘계학술발표회
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• pp.260-265
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• 2004

Acid mine drainage(AMD) is one of the most serious environmental concerns associated with the mining industry around the world. The objective of this study is to assess the potential of sewage sludge as a carbon source for sulfate reducing bacteria and waste lime and steel slag as a neutralize agent for acid mine drainage bioremediation for use in permeable reactive materials. The study was performed using synthetic AMD in six column experiments. The effluent solution was systematically analysed throughout the experiments. The results of the study indicated that sewage sludge, waste lime and steel slag were the most effective for the AMD treatment as a permeable reactive materials.

• 한국환경과학회지
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• 제26권3호
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• pp.303-309
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• 2017

Aeration with low energy micro-bubble generation and $UV/H_2O_2$ processes was introduced to verify the possibility of oxidation treatment for acid mine drainage. During 10 hours of aeration with micro-bubbles, Fe and As concentrations were decreased to 18.1 and 61.8%, respectively, while Cu, Cd, Al were kept at influent concentrations. Other heavy metals such as Mn, Cr, Pb, Zn, and Ni concentrations fluctuated due to the repetition of oxidation and release. Twenty days of aeration indicated the oxidation possibility for Cu, Cd, and Al. With the employment of $UV/H_2O_2$ processes, more than 77% of Cu and Fe removed, whereas slightly more than 30% of Cd and Al removed.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2003년도 추계학술발표회
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• pp.409-412
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• 2003

Total extraction of stream sediments in the Kwangyang mine area shows their significant pollution with most trace metals such as Cr, Co, Fe, Pb, Cu, Ni, Zn and Cd, due to sulfide oxidation in waste dumps. Calculations of enrichment factor shows that Chonam-ri creek sediments are more severely contaminated than Sagok-ri sediments. Using the weak acid (0.1N HCl) extraction and sequential extraction techniques, the transport and sediment-water partitioning of heavy metals in mine drainage were examined for contaminated sediments in the Chonam-ri and Sagok-ri creeks of the Kwangyang Au-Ag mine area. Calculated distribution coefficient (Kd) generally decreases in the order of Pb $\geq$Al > Cu > Mn > Zn > Co > Ni $\geq$ Cd. Sequential extraction of Chonam-ri creek sediments shows that among non-residual fractions the Fe-Mn oxide fraction is most abundant for most of the metals. This indicates that precipitation of Fe hydroxides plays an important role in regulating heavy metal concentrations in water, as shown by field observations.

• 자원환경지질
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• 제29권1호
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• pp.57-63
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• 1996

The Dalsung copper-tungsten mine in the Taegu area, Korea was closed in 1975 and may be the sources of the heavy metal contamination in the tributary system and soil-plant system due to the mine drainage derived from the mine wastes and tailings. To examine the degree and extent of heavy metal contamination in the vicinity of Dalsung mine area, stream water and soil samples were taken and analyzed for heavy metals by ICP-AES and AAS. Highly contaminated soils are found near the Lower Tunnel No.0 ranging up to $1760{\mu}g/g$ As, $2060{\mu}g/g$ Cu, $1120{\mu}g/g$ Pb and 346 ${\mu}g/g$ Zn. From the results of the sequential extraction methods for the metal speciation, the heavy metals in soils may be derived from soil parent materials and acid mine drainage. With the processes for the heavy metal removal, most of the heavy metal ions in the acid mine drainage are removed by being exchanged with Ca ions held by the bentonite, hydroxyapatite and calcium hydoxide.

• 자원환경지질
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• 제41권1호
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• pp.33-45
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• 2008

폐광산으로부터 유출되는 산성광산배수 중화처리를 위해 2가지 방법으로 반응조를 설계하여 실험을 실시하였다. 중화제로 사용한 물질은 방해석이 주 구성광물이여 소량의 돌로마이트를 포함한 석회암이다. 중화 효과는 중화제의 반응 위치와 양에 따라 다르게 나타난다. 반응조 상부에서 산성광산배수와 중화제를 반응 시킬 때 반응 효과가 더 좋으며 중화제의 양이 많을수록 중화되는 속도가 빠르다. 상부에서 중화제와 반응시킬 경우 산성광산배수로부터 침전되는 침전물의 영향을 거의 받지 않아 중화제가 전부 소모될 때까지 반응을 지속시킬 수 있다.

• 한국광물학회지
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• 제16권2호
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• pp.191-198
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• 2003

동해탄광 일대에서 산성광산배수가 유입되는 하천의 바닥에는 적갈색과 황갈색의 침전물이 형성되고 있다. 이 침전물에 대한 X-선 회절분석 결과 적갈색 침전물은 대부분 페리하이드라이트이며 소량의 침철석을 포함하고 있는 반면에 황갈색 침전물은 슈워트마나이트로 구성되어 있다. 열분석과 가열 실험에서 페리하이드라이트와 슈워트마나이트는 약 $400^{\circ}C$에서 결정도가 낮은 적철석으로 변화하며 $700 ^{\circ}C$에서는 결정도가 높은 적철석으로 변화한다.

• 지질공학
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• 제20권1호
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• pp.79-87
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• 2010

본 연구지역에서 2009년 3월부터 9월 사이에 5개 지점(배경수(BW), 산성광산배수(AMD0, AMD1, AMD2, AMD3))에서 수온, pH, Eh, EC, DO 성분 등이 현장에서 6회 관측되었으며, 폐광산 갱내 출구부(AMD0) 지점에서는 유량이 측정되었다. 일광 폐광산에서 유출되는 산성광산배수는 pH 3 이하의 강산성수이며, Eh 성분은 400~600 mV의 범위이었다. 산성광산배수의 EC 값은 주변 배경수에 비해 10배 이상 높았으며, DO 성분은 유출지점 하류부로 갈수록 대기와의 접촉을 통해 그 값이 증가되었다. 산성광산배수 내 중금속 이온의 농도는 Fe > Cu > Zn > Mn > As > Cd 순이었으며, Fe 성분의 농도가 81.870~474.30 mg/L 로서 가장 높았다. 중금속 성분별 최대농도 관측시기는 5월(As, Cd), 6월(Fe), 7월(Cu, Zn, Mn) 이었으며, 최소농도는 4월(Cd, Mn)과 9월(Fe, Cu, Zn, As)에 관측되었다. 산성광산배수에 용존된 중금속의 유출질량은 Fe 성분 53.44 kg, Cu 성분 6.25 kg, Zn 성분 5.26 kg, Mn 성분 2.13 kg, As 성분 0.14 kg, Cd 성분 0.04 kg 정도이었다. 폐광산에서 갱내에서 1일 동안 유출되는 6개 중금속의 전체 질량은 67.26 kg 이었으며, Fe 성분이 전체 유출질량의 79% 정도를 차지하고 있었다.