Coal mining in northeast India: an overview of …
Northeast India has a good deposit of sub-bituminous tertiary coal. The northeast Indian coals have unusual physico-chemical characteristics such as high sulfur, volatile matter and vitrinite content, and low ash content. In addition, many environmental sensitive organic and mineral bound elements such as Fe, Mg, Bi, Al, V, Cu, Cd, Ni, Pb, …
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From Coal Mining to Coal Chemicals? Unpacking New Path …
This article examines the dynamism of the coal-mining industry and the coal-chemical industry in an old industrial region of China, with a particular focus on the mechanism of new path creation and its relatedness to the old path during the past decade. It reveals that the restructuring of the coal-mining industry can be characterized by an ...
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Coal and Air Pollution
When coal burns, the chemical bonds holding its carbon atoms in place are broken, releasing energy. However, other chemical reactions also occur, ... roughly 10 percent of all US methane emissions come from coal mining. Carbon capture and storage technologies (or CCS) are emerging technologies that could allow coal plants to capture …
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Chemical speciation, vertical profile and human health risk …
1. Introduction. The main source of electricity around the world is coal, reaching 40% of the energy matrix World Energy Resources (de Souza et al., 2015).Nevertheless, China is one of the largest global producers and consumers of coal resource (Dai et al., 2012).Coal mine wastes contain compounds such as pyrites, …
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U.S. coal mining
Coal-mining employment in West ia from 2011 to 2022, by mine type Premium Statistic Coal-mining employment in Kentucky 2012-2022 Coal-mining employment in Kentucky 2012-2022
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Environmental, hydrological, and social impacts of coal and …
Coal mining contributes to the destruction of water-bearing stratum, water quality deterioration, and water resource depletion (Masood et al., 2020). Coal mining discharges products with high amounts of sulfide, metalloids, and trace elements in the form of mine tailings and waste rock (Baruah and Khare, 2010).
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Chemicals Used in Mining
Toxic chemicals used in mining include: cyanide, sulfuric acid, and solvents for separating minerals from ore. nitric acid. ammonium nitrate and fuel oil ("ANFO") used in blasting tunnels. heavy metals such …
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Coal Chemistry Industry: From Production of Liquid Fuels to …
Coal resources are one of the key energy sources and essential for modern economic development. Despite the traditional coal industries having made …
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Coking coal of the United States—Modern and historical coking coal
Coking coal, or metallurgical coal, has been produced in the United States for nearly 200 years. Coking coal is primarily used in the production of coke for use in the steel industry, and for other uses (for example, foundries, blacksmithing, heating buildings, and brewing). Currently, U.S. coking coal is produced in Alabama, Arkansas, Pennsylvania, ia, …
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Mining | Definition, History, Examples, Types, Effects, & Facts
mining, process of extracting useful minerals from the surface of the Earth, including the seas. A mineral, with a few exceptions, is an inorganic substance occurring in nature that has a definite chemical composition and distinctive physical properties or molecular structure. (One organic substance, coal, is often discussed as a mineral as well.)
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Toxicological effects of mining hazard elements
PM 2.5 is derived from common sources of atmospheric pollution, such as automotive vehicles, mining operations, biomass burning, and industrial emissions (Nor et al., 2021).PM is harmful to health because it contains chemical compounds, especially PM 2.5, with a high range and strong absorption capacity (Ding et al., 2021).Additionally, PM …
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Minerals | Free Full-Text | Review of Respirable Coal Mine …
Respirable coal mine dust (RCMD) exposure is associated with black lung and silicosis diseases in underground miners. Although only RCMD mass and silica concentrations are regulated, it is possible that particle size, surface area, and other chemical constituents also contribute to its adverse health effects. This review …
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Review and prospects of mining chemical dust suppressant
Coal mine pollution is a serious threat to the mine safe production and occupational health of miners. Chemical dust suppression can effectively reduce the concentration of coal dust and suppress the re-entrainment of dust. This paper discusses the research progress of three kinds of traditional dust suppressants: the wetting-type, …
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Coal
Coal - Carbon, Organic Matter, Sedimentary Rock: The plant material from which coal is derived is composed of a complex mixture of organic compounds, including cellulose, lignin, fats, waxes, and tannins. As peat formation and coalification proceed, these compounds, which have more or less open structures, are broken down, and new …
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Coal explained Coal and the environment
Effects of coal mining. Surface mines (sometimes called strip mines) were the source of about 63% of the coal mined in the United States in 2022. These mining …
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Silica, Some Silicates, Coal Dust and para-Aramid Fibrils.
Employment in coal mining was determined by linkage with the Central Coal Miners Pension Fund; an odds ratio of 1.14 (95% CI, 0.34–1.73) was estimated for past employment as a coal miner. Mean years of underground coal mining among subjects with a history of coal mine employment was 16.8 for cases as compared with 19.7 for controls.
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Abandoned Mine Drainage | US EPA
Abandoned mine drainage is water that is polluted from contact with mining activity, and normally associated with coal mining. It is a common form of water pollution in areas where mining took place in the past. ... This acidic water forms through the chemical reaction of surface water (rainwater, snowmelt, pond water) and shallow subsurface ...
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The Green Chemistry of Sustainable Mining
The Green Chemistry of Sustainable Mining. After a setback during the global financial crisis, the mining chemicals industry is back on track. Elisabeth Fischer talks to industry experts to find out about breathing new life into dead mines, the discovery of exotic minerals and the technology of the future: green chemicals.
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Coal mining | Definition, History, Types, & Facts | Britannica
There is archaeological evidence that coal was burned in funeral pyres during the Bronze Age, 3,000 to 4,000 years ago, in Wales. Aristotle mentions coal ("combustible bodies") in his Meteorologica, and …
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Coal and Water Pollution
Coal mining. Mining operations can negatively impact water supplies, often with long-lasting effects. The fundamental issue involves contamination of nearby rivers, lakes, and aquifers by what comes out of …
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Coal Mining and Processing Methods
In surface mining, the ground covering the coal seam (the overburden) is first removed to expose the coal seam for extraction. The elements of a surface mining operation are (1) topsoil removal and storage for later use, (2) drilling and blasting the strata overlying the coal seam, (3) loading and transporting this fragmented overburden material (called …
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Long term changes of chemical weathering products in …
The study focuses on three rivers. Two of them, the upper Schuylkill and Lackawanna rivers are relatively small watersheds (Table 2), heavily impacted by coal mining.The third is a station on the Susquehanna River at Danville, draining 29,060 km 2 of the 71,328 km 2 watershed (Table 2).The Lackawanna drains into the Susquehanna …
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12.3. Types of Coal-derived Chemicals | netl.doe.gov
The Eastman coal-to-chemicals plant at Kingsport uses cryogenic purification for CO/hydrogen (H 2) separation. Figure 1: Gasification/Syngas Chemical Routes In the cryogenic CO/H 2 purification scheme, syngas feed is first pre-treated with molecular sieves to remove carbon dioxide (CO 2 ) and water before being chilled to approximately -300°F ...
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Analysis of Risk Factors of Coal Chemical Enterprises Based on Text Mining
Coal chemical enterprises have many risk factors, and the causes of accidents are complex. ... This paper developed an improved approach to identify safety risk factors from a volume of coal chemical accident reports using text mining (TM) technology. Firstly, the accident report was preprocessed, and the Term Frequency …
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How Coal Works
Two dominant methods account for the vast majority of underground coal mining: "room and pillar" and "longwall" mining.. In room and pillar mining, seams of coal are partially mined, leaving large pillars …
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Geochemical and mineralogical evaluations of coal, shale, and mine …
The Cenozoic-age Makum coal from northeastern India offers numerous research opportunities because of its diverse geochemical and geological characteristics. Due to its high sulfur content, the coal has been found to be less useful for industrial purposes. It can, however, serve as a hub for ongoing research on coal-based …
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