A slurry is a mixture of solids and fluid that is highly mobile under gravitational and low magnitude stresses, and remains coherent (no bulk phase separation) during transport. In geophysical settings, a slurry is part of a spectrum of mass-flow phenomena known as sediment gravity flows. In agricultural, industrial, and engineering settings, a ...
The coal mining industry creates hundreds of millions of tons of rock, waste coal, and cleaning waste streams comprising coal bed methane (CBM), coal sludge, …
Disposal of coal slurry using underground injection has raised environmental concerns because it may lead to contamination of groundwater and water supplies. In the present study, liquid and solid fractions of coal slurries collected from five underground injection sites and one coal preparation site in West ia (WV) were analyzed for a ...
EPA's regulations required most of the approximately 500 unlined coal ash surface impoundments nationwide to stop receiving waste and begin closure by April 2021. The regulations outlined a process for facilities to apply for two types of extensions to the closure deadline. EPA received and reviewed 57 applications from CCR facilities ...
On October 11, 2000, a breakthrough of Martin County Coal Corporation's coal waste impoundment released 250 million gallons of slurry in near Inez, Kentucky. The 72-acre surface impoundment for coal processing waste …
Permeability of the waste controls the water table, draw-down curve, migration of contaminants out of the waste piles, and oxidation rates. ... Another 32-million gallon coal slurry spill occurred in 1994 near Davella, Kentucky. Here subsidence drained slurry into in a sealed underground mine only about 10 m below the impoundment. A …
In laboratory experiments, the researchers found that the process works with coal ash -- the bacteria create biocement using coal ash, and the coal ash slurry becomes stiffer. In other words, the ...
1 Introduction On October 11, 2000, near Inez, Kentucky, a breakthrough occurred in which a 72-acre surface impoundment of waste materials from coal process- ing at Martin County Coal Corporation released approximately 250 million gallons of slurry into a nearby underground coal mine. The slurry flowed through the mine, into nearby creeks and ...
This water slurry can contain heavy metals (ie arsenic, lead, cadmium, chromium, iron, manganese, aluminum, and nickel), polyacrylamides, hydrocarbons and organic compounds that are known carcinogens to the human body. The large quantity of chemically treated water that remains is known as "coal slurry".
The problem with this storage system is contaminants within coal ash can leach into the soil, rivers, lakes, and groundwater. ... which resulted in more than one billion gallons of coal ash slurry ...
Both surface and underground methods are available for the disposal of coal slurry other than in impoundments. Alternative surface methods include incised ponds, slurry cells, combined refuse piles, and co-disposal of fine and coarse refuse. In many instances, these methods are influenced by topography, geology, and mining and coal preparation ...
Direct coal liquefaction residue (DCLR) as an auxiliary feed material with lignite to prepare coal water slurry (CWS), which is then used as combustion fuels, enables recycle resources of DCLR and ...
Contaminants of Concern Include. Heavy Metals, PAHs, Other. ... Case Description. On October 24, 1996, approximately six million gallons of coal slurry were released by Lone Mountain Processing, Inc. into the Powell River watershed, Lee County, ia. The "Blackwater", a mixture of coal fines, water and associated contaminants, release ...
In coal mine drainage (CMD) precipitate samples, Stewart et al. [14] also noticed a variation on the type of precipitate depending on the pH. The Fe-based precipitate was major in samples with slurry at pH 2.7–7.6, Si and Al were major in precipitate with slurry at pH 6.5–8.2, while Ca and Mg were predominant in precipitate with slurry at ...
For coal slurry impoundments in the Appalachian coal region, the cross-valley impoundment is predominant (ICOLD, 1996; MAC, 1998; U.S. Army Corps of Engineers, 1994; Vick, 1990~. The cross-valley impoundment consists of an embankment constructed across a valley, with slurry discharged within the valley upstream of the embankment.
A coal train rumbling across Montana is a mile and a half (2.4 kilometers) long yet carries barely a day's fuel for a large power plant. The U.S. burns more than a billion tons of coal a year.
The cathode chamber was kept separated from the anode chamber by a porous alundum thimble (1-3/4 in. dia. x 5 in.). A 400 ml beaker was used in all experiments. Coal slurry containing 25 g of the ground Ohio Pittsburgh Seam No. 8 .(minus 48 mesh) was electrolyzed for 30 minutes at 10 volt potential and 0.5 ampere limiting current.
The aqueous suspension of fine refuse, referred to as coal slurry, frequently contains potentially toxic substances, including hydrocarbons, heavy metals, and coal …
Exposure to the slurry of water and other chemicals formed after coal is washed would be more dangerous to human health than exposure to MCMH—and there …
They discussed the conditions that may impact the efficiency of remediation, which is the first study to use bio-slurry for remediation. 66 In 1997, Ramaswami et al. first discovered that bio-slurries could remediate PAHs in coal tar-contaminated soils. 67 In 1998, two studies by Fava et al. demonstrated the efficient remediation capacity of ...
Across the U.S., nearly all coal-burning power plants have severely contaminated groundwater by disposing of their toxic ash in leaking impoundments and landfills. The pressing problem of how to clean up these contaminated sites is a high-stakes question for communities near coal plants. When comparing the economic, …
All told, about 2.6 million cubic yards of so-called coal ash slurry escaped, the TVA says. The collapsed pond is one of three on the site. ... among many other potentially toxic contaminants ...
Exposure to the slurry of water and other chemicals formed after coal is washed would be more dangerous to human health than exposure to MCMH—and there have been numerous coal slurry floods and ...
Among the report's key findings: More than 50 percent of sites had levels of arsenic above federal health standards; and there were unsafe levels of contaminants at 92 percent of coal ash ponds.
Dec. 22, 2008 At the Tennessee Valley Authority's coal plant in Kingston, Tennessee, one of the coal ash impoundment walls breaks and spills more than one billion gallons of coal ash slurry. The slurry and its contaminants affect more than 300 acres, polluting nearby rivers and destroying local infrastructure.
The most studied case of coal ash damage occurred at Belews Lake in North Carolina in the 1970s, when coal ash-contaminated water from an ash pond at Duke Energy's Belews Creek Steam Station caused a long-term catastrophic toxic event. Selenium poisoning killed 19 of the 20 fish species in 3800-acre Belews Lake.
A number of inorganic hazardous air pollutants are found in trace quantities in coal. These include arsenic, beryllium, cadmium, chromium, copper, mercury, manganese, …
A method of dewatering a mixture of coal tailings, water and contaminants comprising the steps of (a) providing a tank having a base surface and introducing ... A similar method and apparatus for dewatering and recovering process water from substantially clean coal slurry products and mineral slurries is also disclosed. Inventors: Miller, Olen ...
Three days before Christmas in 2008, a coal ash pond in Roane County, Tennessee burst open, releasing 1.1 billion gallons of slurry. The waste buried 300 acres, resulting in millions of dollars in damage and allegations — currently under litigation — that failure to prioritize safety during the six-year cleanup contributed to a range of ...
On October 11, 2000, a breakthrough of Martin County Coal Corporation's coal waste impoundment released 250 million gallons of slurry in near Inez, Kentucky. The 72-acre surface impoundment for coal processing waste materials broke through into a nearby underground coal mine. Although the spill caused no loss of human life, environmental ...
In 2000, the bottom of a Kentucky coal slurry impoundment gave way, contaminating more than a hundred miles of rivers and streams with more than 300,000,000 gallons of thick black sludge—30 times larger …
The county's water problems first came into sharp focus – and were exacerbated – in October 2000 when a local coal company spilled 300m gallons (1.16bn litres) of coal slurry containing high ...
