Coal Mining and Production - IFC
mining techniques. Beneficiation plants produce large volumes of tailings and solid wastes. Storage and handling of coal generates dust at rates of as much as 3 kilograms per metric ton (kg/t) of coal mined, with the ambient dust concentration ranging from 10 to 300 micrograms per cubic meter ( µg/ m3)above the background level at the mine site.
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Mine Tailings Waste Leaching & Groundwater Contamination
A notable geographic difference is the generally lower levels of trace elements in Western region coal mining wastes than in wastes from the Appalachian and Eastern Interior regions. Data available from the literature reflect that metal-ore tailings are highly enriched in their metal content.
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ASSESSMENT OF HEAVY METAL CONTAMINATED SOIL NEAR …
distance away from the center of the lignite coal mine tailings, especially total Mn, Cu, Zn, Ni, Co, Pb and Cd. The highest concentrations of total Mn, Cu, Zn, Ni, Co, Cr, Pb, Cd were 1412, 199, 175, 83, 84, 49, 22 and 2 mg kg-1 respectively, indicating severe pollution of the soil in the vicinity of the lignite coal mine tailings. Table 4 shows
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Ground Water Contamination in Coal Mining Areas
In coal mining and industrial areas, the surface and ground water is usually polluted and contaminated. In such areas, water is being contaminated by overburden dump. Surface impoundments, artificial recharge, waste disposal in wet excavation, mine water, industrial effluents, acid mine drainage, tailing pods, etc. (Chandra, 1992).
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Bioassays for the evaluation of reclaimed opencast coal ...
Even though coal is considered a major source of pollution, its use is still chosen in some regions due to its abundance and ease of extraction in mining areas, furthermore, coal place as one of the most used energy sources in the world (World Coal Association 2018).Open-cast coal mining is performed by consecutive excavations of soil material overlaying coal layers and, as a consequence …
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Impact of Coal Mining on Water Resources
Impact of Coal Mining on Water Coal mining requires large quantities of water for dust control, fire protection and coal washing. The average use of water in coal mining varies from 63 to 120 litres per metric tonne in underground mining and about 17 litres per tonne for surface mining.
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Mining: Automated monitoring systems
Our monitoring systems are used in mining operations worldwide to automate the data collection process of your sensors. The versatility, ruggedness, and reliability of Campbell Scientific monitoring systems make them ideal for geotechnical, water level, water quality, slope stability analysis, weather monitoring, ambient air quality, lightning warning, environmental compliance, dam and tailing ...
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Tailings - Wikipedia
Coal refuse (also described as coal waste, coal tailings, waste material, culm, boney, or gob) is the material left over from coal mining, usually as tailings piles or spoil tips. For every tonne of hard coal generated by mining, 400 kilograms of waste material remains, which includes some lost coal that is partially economically recoverable.
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Mine tailing disposal sites: contamination problems ...
The environmental issues with mining sites are associated with tailing deposits, weathering, acid mine drainage (AMD), dam safety, and the subsequent impact to landscape and quality of groundwater, surface water and soil. Mine tailings are the most serious problem when dealing with the restoration of former mining areas (Dold and Fontboté 2002 ...
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Mine tailing disposal sites: contamination problems ...
12%The environmental issues with mining sites are associated with tailing deposits, weathering, acid mine drainage (AMD), dam safety, and the subsequent impact to landscape and quality of groundwater, surface water and soil. Mine tailings are the most serious problem when dealing with the restoration of former mining areas (Dold and Fontboté 2002 ...
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Post Bauxite Mining Land Soil Characteristics and Its ...
The removal of the topsoil from a post bauxite mining site and mixing it with the underlying soil considerably reduced the relative proportion of organic carbon. The C concentration in the post bauxite mining soils was 0.7 ± 0.2%; this range included in the level of organic carbon in overburden was found to be 0.35% to 0.85% . C is an ...
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(PDF) Pollution in acid mine drainage from mine tailings ...
Throughout the summer season of 2000 samples of acid mine drainage (AMD) were collected from areas below tailing deposits from the coal mining in Svalbard, Norwegian Arctic.
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Characteristics of mining spoiled and oil drilling sites ...
The most common problems of abandoned mine sites are the alteration of the landscape, change in soil properties, harsh pH level, unused shafts and pits change in surface and groundwater regimes, subsidence, sites become derelict, change in vegetation cover, etc. (Mhlongo and Amponsah-Dacosta, 2015; Jain and Das, 2017) .
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Coal Mine Water Selenium Removal Summary 20 08 11
COAL MINING POND WATER PERFORMANCE Field waters from ten different mining sites were treated by Sorbster® media and in all cases, a reduction in selenium occurred. In five of the ten coal pond sites, the selenium removal attained was to less than 5ppb or > 95%. Removal was rapid and sustained. In the other five sites, selenium removal ranged from
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Frequency Distribution of the pH of Coal-Mine Drainage in ...
The pH of coal-mine drainage in Pennsylvania has a bimodal frequency distribution, with modes at pH 2.5 to 4 (acidic) and pH 6 to 7 (near neutral). Although iron-disulfide and calcareous minerals comprise only a few percent, or less, of the coal-bearing rock, these minerals are highly reactive and are mainly
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Mining and Water Quality - USGS.gov
Acid mine drainage (AMD) consists of metal-laden solutions produced by the oxidative dissolution of iron sulfide minerals exposed to air, moisture, and acidophilic microbes during the mining of coal and metal deposits. The pH of AMD is usually in the range of 2–6, but mine-impacted waters at circumneutral pH (5–8) are also common.
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Mining | Water for all
In order to reach this level, mining companies can use the technology outlined below. For example, adding an open limestone channel can raise pH by 0.5 of acid mine drainage, bringing the AMD 0.5 closer to the target. These processes are described in detail …
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1.1 PHASES OF A MINING PROJECT - ELAW
1.1.2.2 Site preparation and clearing If a mine site is located in a remote, undeveloped area, the project proponent may need to begin by clearing land for the construction of staging areas that would house project personnel and equipment. Even before any land is …
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Review Role of Microorganisms in Mining: Generation of ...
The management of waste materials such as tailings and waste rocks from mining of ... hydrological properties of the site. The type of mining operation, coal versus metal or uranium ... reduced sulphur compounds at pH levels of 6.0 to 8.0 and can reduce nitrate (NO3-) or nitrite (NO2-) to nitrogen gas (N
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Geochemistry of acid mine drainage from a coal mining area ...
Acid drainage influence on the water and sediment quality was investigated in a coal mining area (southern Brazil). Mine drainage showed pH between 3.2 and 4.6 and elevated concentrations of sulfate, As and metals, of which, Fe, Mn and Zn exceeded the limits for the emission of effluents stated in the Brazilian legislation.
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Storage/Disposal Coal Mine Tailings (Technical Report ...
Storage/Disposal Coal Mine Tailings in Pond, Piles, or Backfill. Authors: Skone, Timothy J [1] + Show Author Affiliations. NETL; Publication Date: Wed Jun 04 00:00:00 EDT 2014 Research Org.: National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States) Sponsoring Org.: FE
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Characterization and flocculation studies of fine coal ...
coal tailings and the flocculation process, using a synthetic polymer at various pulp densities and slurry pH values. Experimental Materials The coal sample used in the experiments was collected from Jharia Coalfield, India. The capacity of the plant (plant feed) was 200 t/h (ROM coal), of which 25–30 t/h reports as plant tailings.
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Treatment of coal tailings - ScienceDirect
Raw coal minus 1.0 mm or 0.5 mm in size is usually upgraded by froth flotation, or a combination of flotation and gravity concentration, before dewatering and being added to the products of the coarser coal separation. The tailings slurry arrives at the plant thickener as a dilute mixture of between 5% and 10% solids w/w.
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Acid Mine Drainage from Coal Mining in the United States ...
Acid mine drainage (AMD) is water generated from mining activities with a deficient pH level due to oxidation of sulfide minerals such as pyrite, which have resulted in a high concentration of ...
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Technical Document: Acid Mine Drainage Prediction
mining ventures, as a major problem facing the future of metal mining in the western United States (U.S. Forest Service 1993). Acid mine drainage from coal and mineral mining operations is a difficult and costly problem. In the eastern U.S., more than 7,000 kilometers of streams are affected by acid drainage from coal mines (Kim et al. 1982).
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Assessing Bioremediation of Acid Mine Drainage in Coal ...
remediation conditions for groundwater contaminants that include selected metals found at coal mining sites. The ... standing water, soil, tailings piles, or exposed rock surfaces. The system may serve multiple purposes, such as revegetation and soil stabilization, ... pH level greater than 4.5, and low Eh (-150 mV). SRB can function in
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Hydrochemical characteristics of mine waters from ...
The study included 80 mine water samples from 59 abandoned mining sites. Their cation composition was dominated by Ca2+, while the most common anions were found to be SO4 2− and HCO3 −. Strong correlations were established between the pH level and metal (Fe, Mn, Zn, Cu) concentrations in the mine waters.
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Coal Mining and Production - MIGA
Coal Mining and Production 342 Loads Per Unit of Production* Parameter Surface mining (t/1000t coal produced) Underground mining (t/1000t coal produced) Mining Techniques Contour Area Conventional Longwall Liquid effluents 0.24 1.2 1 1.6 Solid waste 10 10 3 5 Dust 0.1 0.06 0.006 0.01 Source: Based on Edgar, 1983
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Storage/Disposal Coal Mine Tailings (Technical Report ...
Storage/Disposal Coal Mine Tailings in Pond, Piles, or Backfill. Authors: Skone, Timothy J [1] + Show Author Affiliations. NETL; Publication Date: Wed Jun 04 00:00:00 EDT 2014
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Coal Mining and Preparation Mineral Industry Solutions
Coal Preparation Circuit. Three quarters of American coal is mined east of the Mississippi River. Half of this is "prepared" coal. Coal preparation offers a number of commercial and environmental benefits. These include increased quality and commercial value of saleable coal by achieving 75-80% ash reduction and 15-80% trace element reduction.
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Management of Tailings and Waste-Rock in Mining Activities
Management of tailings and waste-rock in mining iii Some parts of the mining industry, such as metal and coal mining within Europe, operate under severe economic conditions, mainly because the deposits can no longer compete on an international level. The EU metal sector is …
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MSHA HANDBOOK SERIES
impoundments and tailings dams at coal and metal and nonmetal mines consistent with Section 103(a) of the Mine Act. This handbook supersedes instructions included in a separate Coal handbook that MSHA previously issued. The guidance is general and persons should refer to the Federal Mine Safety and Health Act of 1977, as amended
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pH | US EPA
Sources and Activities that Suggest Including Low pH as a Candidate Cause. Mine wastes/historic mine sites: Coal mining is a well known source of low pH, particularly where sulfur-bearing rock is present. Drainage from other mines and mine wastes can also be very acidic.
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