• 자원환경지질
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• 제53권3호
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• pp.235-244
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• 2020

폐광산 지역에서 발생하는 광산배수의 오염원소중 하나인 구리(Cu)는 낮은 농도에서도 독성을 지니고 있어 수계환경에 노출되기 전에 처리되어야 한다. 본 연구에서는 경남 고성군 S광산의 갱내수 정화시설의 Cu 제거효율을 개선하기 위해 석회석과 폐상퇴비를 혼합한 자연정화 기반의 반응조를 이용하여 약 9개월 동안 현장 파일럿실험을 수행하였다. 반응조별 유입수 대비 pH 증가량과 Cu 제거효율은 Successive Alkalinity Producing System (SAPS) > Reducing and Alkalinity Producing System (RAPS) > 석회석반응조 순으로 나타났다. SAPS조와 RAPS조에서는 석회석의 영향과 동시에 유기물의 분해로 인한 알칼리도의 부과로 석회석반응조보다 높은 pH 환경을 조성하였다. pH가 증가할수록 Cu 제거효율이 높아지는 결과를 통해 pH 상승이 Cu를 처리하는 주된 기작임을 확인할 수 있었다. 또한 황산염환원박테리아(Sulfate Reduction Bacteria, SRB)가 SAPS조에서 가장 많이 활성화 된 것을 확인 할 수 있어, 황산염환원반응도 Cu를 제거시키는 기작에 관여함을 판단할 수 있었다. 본 연구는 S광산에서 발생하는 광산배수의 특성에 알맞은 맞춤형 정화공정을 도출하기 위해 현장 그대로의 조건에서 실험을 수행한 것에 의의가 있으며, 향후 정화시설의 개선에 있어 공법 선정에 도움을 줄 수 있을 것이다.

• 자원환경지질
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• 제37권1호
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• pp.35-48
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• 2004

본 논문에서는 폐광산지역의 오염특성 조사와 평가를 위한 지구화학적 접근방법에 대하여 정리ㆍ기술하였다. 폐광산지역의 주요 오염원은 갱내수, 광석, 광미 및 선광을 위해 사용한 화학약품 등이고 산성광산배수의 배출, 광산폐기물의 유실, 유해성 침출수의 배출, 광미와 분진의 분산 등에 의해 중금속이 이동/확산되어 주변토양, 퇴적물, 지표수, 지하수, 생태계에 광역적/지속적으로 심각한 영향을 미친다. 따라서 오염원, 주변 토양, 지표수, 지하수 등에 대한 화학분석, 광물학적분석, 광산산성배수 예측실험, 물리/지화학탐사와 같은 현장실험 등의 방법을 이용한 조사를 통해 폐광산이 주변 환경에 미치는 잠재적이고 실제적인 영향이 조사$.$평가 되어야한다.

• 한국지하수토양환경학회지:지하수토양환경
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• 제25권1호
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• pp.53-61
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• 2020

This study assessed the feasibility of coal mine drainage sludge (CMDS) as a stabilizing agent for mercury contaminated soil through pot experiments and batch tests. In the pot experiments with 43 days of lettuce growth, the bioavailability of mercury in the amended soil and mercury content of the lettuce were decreased by 46% and 50%, respectively. These results were similar to those of the soil amended with the sulfide compound (FeS) generally used for mercury stabilization. Thus, CMDS could be an attractive mercury stabilizer in terms of industrial by-product recycling. Batch tests were conducted to examine mercury fractionation including reactions between the soil and acetic acid. The result showed that some elemental fraction changed to strongly bounded fraction rather than residual (HgS) fraction. This made it possible to conclude that mercury adsorption on oxides in CMDS was the major mechanism of stabilization.

• 한국토양환경학회지
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• 제4권1호
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• pp.35-47
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• 1999

구봉광산의 광미와 주변 밭과 논의 토양 및 하상퇴적물에서의 중금속과 시안의 분포 및 오염도에 대해 조사하였다. 광미 중의 As, Cd, Cu, Hg, Pb, Zn및 CN￣의 평균농도는 각각 6.93$\times$$10^{3}$, 56.9, 209, 5.03, 3.25$\times$$10^{3}$, 1.89$\times$$10^{3}$, 21mg/kg이었고 Kloke가 제안한 허용기준치를 이용하여 계산한 오염지수는 42~95이었으며 pH는 약알칼리성이었다. 광산과 인접한 밭 토양 중의 중금속과 시안 함량은 논 토양보다 높았다. 하상퇴적물 중의 중금속과 시안 함량은 광미 중의 분석치정도로 많이 검출되었다.

• 한국지구물리탐사학회:학술대회논문집
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• 한국지구물리탐사학회 2003년도 Proceedings of the international symposium on the fusion technology
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• pp.515-517
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• 2003

In order to assess the risk of adverse health effects on human exposure to arsenic and heavy metals influenced by past mining activities, environmental geochemical surveys were undertaken in the abandoned metal mine areas (Dongil Au-Ag-Cu-Zn, Okdong Cu-Pb-Zn, Songcheon Au-Ag, Dongjung Au-Ag-Pb-Zn, Dokok Au-Ag-Cu and Hwacheon Au-Ag-Pb-Zn mines). Arsenic and other heavy metals were highly elevated in the tailings from the Dongil, the Songcheon and the Dongjung mines. High concentrations of heavy metals except As were also found in tailings from the Okdong, the Dokok and the Hwacheon mines. These significant concentrations can impact on soils and waters around the tailing dumps. Risk compounds deriving from mine sites either constitute a toxic risk or a carcinogenic risk. The hazard index (H.I.) of As in the Dongil, the Okdong, the Songcheon and the Hwacheon mine areas was higher value more than 1.0. In the Okdong and the Songcheon mine areas, H.I. value of Cd exceeded 1.0. These values of As and Cd were the highest in the Songcheon mine area. Therefore, toxic risks for As and Cd exist via exposure (ingestion) of contaminated soil, groundwater and rice grain in these mine areas. The cancer risk for As in stream or ground water used for drinking water from the Songcheon, the Dongil, the Okdong, the Dongjung and the Hwacheon mine areas was 3E-3, 8E-4, 7E-4, 2E-4 and 1E-4, respectively.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2009년도 세계 도시지반공학 심포지엄
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• pp.1511-1516
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• 2009

In recent years, the large-scale shaft have been appling in domestic mine for mass production using a large machine, the safety of mine also have been increasing. And the new trial that shotcrete of tunnel field was apply to mine support was progressed. But, the conditions of domestic mine was different from that of tunnel, so, the batch plant of tunnel could not be installed in mine field because of low economical efficiency and difficulty for selection of site. Ready-mixed Shotcrete that mixed with high quality materials and could be controled shotcrete quality is producted in plants and transported to field, so do not need to batch plant. In this study, The Field test of the Ready-mixed Shotcrete was performed in the large-scale mine and was compared with the quality of Field mix shotcrete. As the result of the Field test, compressive strength and rebound of Ready-mixed Shotcrete were superior to these of Field mix shotcrete.

• 한국물환경학회지
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• 제23권2호
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• pp.287-293
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• 2007

Heavy metal contamination and biological toxicity of mine drainages and sediments in abandoned mines were studied. Mine drainages had pH at a range of 2.94~7.86, and contained heavy metals at a toxic level. For coal mines, toxicity of mine drainage to Daphnia magna was attributable to acidic pH. In addition to the low pH, suspended heavy metals such as Zn and Cu contributed to toxicity of mine drainages at abandoned metalliferous mines. All mine sediments studied in this work showed biological toxicity to Chironomus riparius, having mortality at a range of 15~60%. However, its relationship with physicochemical properties including heavy metal content of the sediments was not statistically explained. Exceptionally clay ($< 2{\mu}m$ particle) content was negatively correlated with the biological toxicity for sediment samples collected at the same abandoned mines.

• Environmental Engineering Research
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• 제24권1호
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• pp.82-90
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• 2019

Meeting the regulations based on the short-term leaching tests may not necessarily assure the environmental and human health safety of reusing mine wastes. This study investigated heavy metal leachability of four metal mine waste samples (e.g., Z, Y, H, and M) and human health risk of reusing them as construction materials. The heavy metal leachability did not depend on the total heavy metal contents. For example, the Z sample contained greater amounts of As and Fe than Zn, but the leachates contained only Zn at a detectable level. This can be attributed to the crystalline structure and heavy metal fractions of the mine wastes. The leaching test results suggested that the four mine waste samples are potentially reusable. But the Z and M samples reused in industrial areas imposed carcinogenic risks. This was largely attributed to As that is exposed via dermal contact. The Y and H samples reused in residential areas imposed carcinogenic risk. The major exposure route was the ingestion of crops grown on the mine wastes and Cr was the major concern. The two-stage assessment involving leaching tests and risk assessment can be used to promote safe reuse of mine wastes.

• 한국자원공학회지
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• 제55권6호
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• pp.538-545
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• 2018

광해방지사업의 효율적 추진을 위해서 중장기 로드맵에 따른 체계적인 광해방지기술개발이 필요하다. 1, 2단계 로드맵에 따른 광해방지기술개발 주요성과들을 분석해본 결과 기술개발 성과공유 확산의 필요성이 제기되었다. 본 연구에서는 대내외적 기술 수요를 포괄하는 3단계 로드맵의 과제들을 점검해봄으로써, 기술개발 성과공유 확산을 통한 지속가능한 광해방지 기술개발 전략의 발전방안에 대해서 고찰하였다.

• 한국토양비료학회지
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• 제47권6호
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• pp.533-539
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• 2014

Mine wastes such as acid mine drainage (AMD) can cause the detrimental effects on surrounding environment, thereby eventually threatening human health. Main objective of this study was to evaluate the neutralizing effect of fly ash (FA) as a stabilizing material AMD. Field plot was constructed in a coal waste depot which has caused aluminium-whitening adjacent to the stream. Different mixing ratios of FA were applied on a top of the soil, and then the physicochemical properties of runoff and soil were monitored. Constructed plots were as following: control (mine waste only (W)), mine waste + 20% ($w\;w^{-1}$)of FA (WC20M), mine waste + 40% ($w\;w^{-1}$)of FA (WC40M), and WC40M dressed with a fresh soil at the top (WC40MD). Result showed that initial pH of runoff in control was 5.09 while that in WC40M (7.81) was significantly increased. For a plot treated with WC40M, the concentration of Al in runoff was decreased to $0.22mg\;L^{-1}$ compared to the W as the control ($4.85mg\;L^{-1}$). Moreover, the concentration of Fe was also decreased to less than half at the WC40M compared to the control. Application of FA can be useful for neutralizing AMD and possibly minimizing adverse effect of AMD in mining area.