2 edition of Estimating the acid potential of coal mine refuse found in the catalog.
Estimating the acid potential of coal mine refuse
Frank T. Caruccio
A technique to estimate the amount of acidity from coal spoil material and to enhance reclamation efforts is presented. Framboidal pyrite is found to produce much more acidity than secondary pyrite, and should be used as an estimator of acid production potential.
disposal entitled “The Coal Refuse Disposal Cont rol Act, Act of Septem , P.L. , No. ” This has allowed the Commonwealth to address active coal refuse pile fires and to attempt to prevent additional coal refuse piles from catching fire. While the efforts have met with success, new coal refuse fires continue to occur. Reclamation entailed excavating the coal and silver mill waste materials, mixing them in a specific ratio, and placing them in a disposal facility. The waste material mixing ratio was based on geochemical testing that indicated that coal buffers the acid production potential of the mill waste.
Acid mine drainage (AMD) due to the oxidation of sulphide bearing waste rock (WR) is a common environmental problem associated with coal extraction. Therefore, WRs from the Lakhra coal field in Pakistan, were studied to i) perform a mineralogical and chemical characterisation, ii) determine the AMD generating potential and iii) estimate the. mine, greater is the quantum of waste generated. Opencast mines are therefore more pollution intensive as they generate much higher quantities of waste compared to the underground mines. Open-pit mines produce 8 to 10 times as much waste as underground mines.1 Once the ore is .
Visit to get more information about this book, to buy it in print, or to download it as a free PDF. The context for any assessment of future coal production is inextricably linked with the development of a national carbon emissions policy. Potential constraints on greenhouse gas. potential leachates, the direct environment (soil, groundwater, surface water, air) and the potential targets (human, fauna and flora). The realisation of a Geographic Information System (GIS) specific to mining waste quantities and their pollution potential in different environmental contexts would thus constitute a tool in the.
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Elghali et al. () used mineralogical and chemical characterization to estimate net acid-generating potential of waste rocks from the open pit mine in Abitibi, Canada. Results showed that sulfides primarily consisted of fine to mid-sized : Bharat Sharma Acharya, Gehendra Kharel.
The importance of testing coal for acid producing potential is due to coal stringers and uneconomic coal often being mixed in with waste rock and coal being left in poorly managed stockpiles. Of the 28 coal samples tested, the samples from the Pirongia mine (closed in ) had the highest reactive sulphur in kilograms per tonne of by: Coal refuse is a legacy of previous coal mining and consists of low-quality coal mixed with rock, shale, slate, clay and other material.
Also known as waste, culm, gob and boney, it was discarded as a “waste” during the original coal extraction process and randomly disposed in piles near the mine sites. Assessment of the potential for waste rock at coal mine sites to produce acid mine drainage is an important part of mine planning and operations and is commonly assessed using acid base accounting.
kinetic tests is used to classify mine wastes and predict acid drainage on the basis of their potential to generate acid (Geidel et al.
These tests are extremely useful for management of acid mine drainage in various types of mines include coal. Recent relevant studies include those by Me´ndez-Ortiz et al. (), where the processes and. gives an estimate of global annual coal mining waste genera- sulfur content and acid generation potential.
The concept behind the presented studies was to provide data for correct evaluation. Acid drainage from underground coal mines and coal refuse piles is one of the most persistent industrial pollution problems in the United States. Pyrite in the coal and overlying strata, when exposed to air and water, oxidizes, producing ferrous ions and sulfuric acid.
And that’s a conservative estimate: ARIPPA guesses the amount of coal refuse in the state is actually about 2 billion cubic yards, split equally between the anthracite and bituminous coal. The project is expected to produce 60 million tonnes of (product) coal per annum and has a potential life of 60 years and the total quantity of waste that is expected to be moved is about billion tonnes.
Four hundred and seventy samples of potential mine wastes and coal materials were taken from drill. Abstract. The uncontrolled release of acid mine drainage (AMD) is perhaps the most serious impact mining can have on the environment. The cumulative length of streams worldwide affected by acid mine drainage is not known, but over km of streams in the eastern United States are seriously affected by acid drainage from coal mines (Kim et al.
Acid mine drainage from coal and mineral mining operations is a difficult and costly problem. In the eastern U.S., more than 7, kilometers of streams are affected by acid drainage from coal mines (Kim et al. In the western U.S., the Forest Service estimates that.
To the coal mining industry, cleaning acid drainage is a burden. Some researchers see the mine waste as a possible source of now-scarce minerals. Caruccio, F.T., ‘Estimating the acid production potential of coal mine refuse’,in Chadwick and Goodman (eds),The Ecology of Resource Degradation and Renewal, Blackwell Scientific Pub., London,– Google Scholar.
Acid mine drainage, acid and metalliferous drainage (AMD), or acid rock drainage (ARD) is the outflow of acidic water from metal mines or coal mines. Acid rock drainage occurs naturally within some environments as part of the rock weathering process but is exacerbated by large-scale earth disturbances characteristic of mining and other large construction activities, usually within rocks.
bacillus ferrooxidans could be controlled in coal refuse using anionic surfactants, with an associated decrease in acid production of about 75 pet. Based on these results, large-scale tests were conducted at an 8-acre active coal refuse area in northern West Virginia and an ll-acre.
The Abandoned Mine Site Characterization and Cleanup Handbook (Handbook) is the result of the collective efforts and contributions of a number of individuals. During the earliest days of Handbook development, Mike Bishop of EPA Region 8 lead the effort to develop a Superfund Mine Waste Reference Document for EPA project managers working on mine.
Acid mine drainage analysis for the Reddale Coal Mine, Reefton, New Zealand. New Zealand Journal of Geology and Geophysics: Vol. 59, No. 2, pp. Acid Mine Drainage: Chemistry Acid mine drainage impacts stream and river ecosystems through acidity, ferric ion (Fe 3+) precipitation, oxygen depletion, and release of heavy metals associated with coal and metal mining, such as aluminum (Al 3+), zinc (Zn 2+), and manganese (Mn 2+).
When mineral deposits that contain sulfides are mined, they have the potential to produce acid mine. Throughout coal mining country of the Eastern U.S. you will find streams that run a peculiar rusty orange. It’s the result of pollution called acid mine drainage, or AMD.
Rare earth mine companies have tried and failed in the US already. They just weren’t profitable on their own. The hope now is that rare earth mining can be economically viable if it piggybacks on other mining operations such as chers have already begun to identify rare earth elements in and around coal seams as well as those within waste products associated with mining and burning.
Waste Characteristics Key impacts of surface mining are typically massive disturbances of large areas of land and possible disruption of surface and groundwater patterns. In some surface mines, the generation of acid mine drainage (AMD) is a major problem.
Other significant impacts include fugitive dust and disposal of overburden/waste rock. The generation of acid in reactive sulphide-containing rocks is a major global problem confronting advanced countries, and serving as a wake-up call for developing countries like Ghana.
South-western Ghana hosts two major gold belts, which house ten large-scale mining companies, several small-scale mining companies, farms and other activities.Coal mining in the central Appalachians disturbs the natural landscape in a number of ways: First of all, there is the direct disturbance of lands that lie above the coal seams that must be reclaimed via landform and soil reconstruction followed by ly, the coal that is mined usually contains large amounts of ash-forming and.