Environmental Contaminants in Coal Slurry Intended for
2014.8.7 The aqueous suspension of fine refuse, referred to as coal slurry, frequently contains potentially toxic substances, including hydrocarbons, heavy metals, and coal cleaning chemicals. Disposal of coal slurry using underground injection has
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Coal wastes: handling, pollution, impacts, and utilization
2023.1.1 4.1. Introduction Coal mining is one of the most significant worldwide mining activities due to high electricity and heat production demands. The current known coal
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Coal slurry - Wikipedia
Ideally, coal slurry consists only of crushed coal and water, which can be efficiently separated. In practice, the separation is significantly costly due to the large amounts of water needed and wastewater generated by the process. Furthermore, the slurry consists also of very fine coal dust that results in a waste called blackwater. As blackwater cannot be purified by a water treatment plant
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Major gas emissions from combustion of slurry fuels
2018.3.10 A number of factors defining the said concentrations are established: the quality of components, their elemental composition and concentration (40–60% coal,
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Study on coal water slurries prepared from coal chemical
2020.6.15 In this paper, coal wastewater slurry is prepared by different types of wastewater that have been produced by the coal water slurry gasification combined with
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Environmental Contaminants in Coal Slurry Intended for
2015.1.1 Disposal of coal slurry using underground injection has raised environmental concerns because it may lead to contamination of groundwater and water
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Environmental Contaminants in Coal Slurry Intended for
AbstractWaste from coal cleaning processes includes coarse size fractions (i.e., coarse refuse) and small particles (i.e., fine refuse). The aqueous suspension of fine refuse,
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Preparing coal slurry from organic wastewater to achieve resource ...
2023.5.1 The addition of wastewater can improve the pseudoplasticity of the coal slurry. • The stability of coal slurry prepared with ammonium-forming wastewater is the
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Slurrying Property and Mechanism of Coal–Coal Gasification
2018.3.13 SUBJECTS: Hydrocarbons, Wastewater, Coal, Viscosity, Cations Abstract The co-slurrying technology of coal and organic wastewater, which achieves the
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Water Free Full-Text Combined Treatments of Underground
2021.11.1 Coal slurry is generated in the underground working site, especially for water abundant coal mines. The generated coal slurry is treated to prevent water
Charlar en LíneaHow Dangerous Is the Coal-Washing Chemical Spilled in West Virginia?
2014.1.10 Water is a universal solvent, capable of dissolving most elements on Earth.But it fails when it comes to completely cleaning coal. That's where 4-methylcyclohexane methanol, MCHM for short, comes ...
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Concerns with Passive Anaerobic Bioreactors for Selenium
2023.1.27 Passive anaerobic bioreactors (PABs) are flow-through trenches filled with plant substrates that serve as energy and carbon sources for bacteria that carry out water treatment processes. In this study, the effectiveness of PABs to bioreduce selenate to insoluble Se (0) and improve the water quality of coal slurry impoundment liquid (CSL)
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Coal Slurry - an overview ScienceDirect Topics
Coal slurry is first prepared by crushing the coal to a size of 0.2 mm particle diameter along with water addition. The coal slurry is the pumped to the gasifier where the reactions take place in the controlled amount of oxygen. The gasifier effluent contains a mixture of gaseous products including CO, H 2, CO 2, H 2 O, Ar, H 2 S and minor quantities of other gases.
Charlar en LíneaMartin County water crisis - Wikipedia
The Martin County water crisis is an on-going public health crisis that began in 2000, when a coal slurry spill contaminated the area’s water supply with cancer-causing disinfection byproducts and coliform bacteria. Residents report the water having a strong smell of chlorine, discoloration, odd taste, sediment and irritation/burning when in contact with skin.
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An Analysis of Constructed Treatment Wetlands to Purify Coal Slurry ...
2014.4.29 Constructed treatment wetlands (CTW) are used in unison with settling ponds to remove contaminants from wastewater. The use of reed plants and fish creates a biofiltration mechanism by which nitrogen, ammonia, heavy metals, and mine water acid drainage can be mitigated. (Hedin, 2013) (EPA, 2009)
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Environmental Contaminants in Coal Slurry Intended for
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 Virginia (WV) were analyzed for a suite of
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How Coal Works Union of Concerned Scientists
2017.12.15 Unfortunately, the contaminants and non-coal material removed during washing must go somewhere, and are typically left in large wastewater ponds, known as “slurry” reservoirs or impoundments. There are over 700 such reservoirs in Appalachia alone, holding hundreds of millions of gallons of mine waste.
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Coal waste - Global Energy Monitor
60 Minutes on coal waste. Coal mining and coal combustion in power plants produce several types of wastes: The mining process itself produces waste coal or solid mining refuse, which is a mixture of coal and rock.; The mining process also produces liquid coal waste, which is then stored in impoundments.; Pollution control equipment used for coal
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ENERGY Free Full-Text Simulation Research on Coal-Water Slurry ...
2023.8.3 Abstract. In this paper, based on Fluent software, a five-nozzle gasifier reactor was established to simulate the gasification process of oil-based drill cuttings coal-water slurry. The influence of concentration and oxygen/carbon atomic ratio on the gasification process of oil-based drill cuttings coal-water slurry was investigated.
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Coal slurry spill pollutes W.Va. creek Al Jazeera America
2014.2.11 But environmental groups say MCHM isn’t the only problem with slurry pollution across coal country, and that other contaminants in the coal slurry can be harmful. “The rock, coal and clays contain a wide range of heavy metals including arsenic, lead, cadmium, chromium, iron, manganese, aluminum and nickel,” according to the
Charlar en LíneaAn Overview of Soil Pollution and Remediation Strategies in Coal
2023.8.11 Coal remains a very important source of energy for the global economy. Surface and underground coal mining are the two major methods of coal extraction, and both have benefits and drawbacks. Surface coal mining can have a variety of environmental impacts including ecosystem losses, landscape alteration, soil destruction, and changes
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Slurry SpringerLink
2013.1.1 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
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Prospects for reclaiming fine coal from slurry ponds - OSTI.GOV
1995.12.31 @article{osti_171617, title = {Prospects for reclaiming fine coal from slurry ponds}, author = {Schimmoller, B K and Jacobsen, P S and Hucko, R E}, abstractNote = {Although 400-500 million tons of coal are washed in the U.S. each year, less than half of the fine fraction [minus 28 mesh (0.6 mm)] is subjected to cleaning; a
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EPA Says It’s Time to Clean Coal Ash - EHS Daily Advisor
Updated: Jan 27, 2022. On January 11, 2022, the EPA announced coal-fired power plants will be required to clean up their coal-ash waste ponds as the Agency begins enforcing regulations to remove decades of coal combustion residue (CCR). Facilities impacted by this announcement are located in New York, Illinois, Michigan, Missouri, Indiana, Ohio ...
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Chemistry of Trace Inorganic Elements in Coal Combustion
2020.9.9 The Impacts of Trace Elements from Coal Combustion on the Environment and Human Health. On a mass basis, the major air pollutants emitted from coal combustion are sulfur dioxide (SO 2), nitrogen oxides (NO + NO 2 or NOx), and particulate matter (PM), all of which affect human health and the health of ecosystems. When coal is burned, the
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Diffusion mechanism and sensitivity analysis of slurry while
2020.5.12 Investigating the diffusion law of slurry while grouting in fractured aquifer is of great significance to the safety in coal mining. In this paper, we comprehensively studied the slurry diffusion in the fractured aquifer, which was grouted through horizontal injection holes. A theoretical model of slurry diffusion in the inclined tubular fractures, as
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Coal sludge - Global Energy Monitor
2021.4.29 Coal sludge, also known as slurry, is the liquid coal waste produced by mining activities. After mining, coal is crushed and washed to remove the surrounding soil and rock. The washing process generates huge amounts of liquid waste, and the mining process itself produces millions of tons of solid waste. Coal companies usually dispose
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Heavy Metal Accumulation in Hot Water Tanks in a Region
2007.9.11 In 2000, a coal slurry impoundment failure in Martin County, Kentucky, caused concerns about contaminants entering municipal water supplies. Water samples taken from impacted and reference area hot water tanks often exceeded US EPA drinking water guidelines. Concentrations of As, Cd, Cr, Cu, Fe, Mn, and Pb had maxima of 119;
Charlar en LíneaTransport and Reaction Processes in Bioremediation of Organic ...
2003.1.5 Transport processes in the soil matrix can control the rates of bioremediation of low-solubility contaminants. In this study, experiments were designed to test the hypothesis that diffusion of ...
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Water pollution from coal - Global Energy Monitor
Emissions from coal-fired power plants are the largest source of mercury in the United States, accounting for about 41 percent (48 tons in 1999) of industrial releases. According to the Centers for Disease Control and Prevention, eight percent of American women of childbearing age had unsafe levels of mercury in their blood, putting approximately
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