Coal fly ash as a resource for rare earth elements
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چکیده
منابع مشابه
Coal fly ash as a resource for rare earth elements
Rare earth elements (REE) have been recognised as critical raw materials, crucial for many clean technologies. As the gap between their global demand and supply increases, the search for their alternative resources becomes more and more important, especially for the countries which depend highly on their import. Coal fly ash (CFA), which when not utilised is considered waste, has been regarded ...
متن کاملEnvironmental Review of Coal Ash as a Resource for Rare Earth and Strategic Elements
Recently, prices of strategic minerals and rare earth elements have been rising dramatically due to global supply shortages and increasing demands. These metals are integral components of advanced technologies, such as, cell-phones, wind turbines, permanent magnets, and semi-conductors. The relative scarcity of these valuable elements has prompted many companies to search for new mineral source...
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Recently, the worldwide supply of rare earth element (REE) resources will be severely restricted. On the other hand, coal fly ash particles emitted from coal-fired electric power plants contain relatively high concentrations of REEs. The contents of REEs in coal fly ash are regularly several hundreds of ppmw. In order to extract and recover REEs from coal fly ash particles, as a first step, we ...
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Today coal is among the most important energy sources. In order to meet the world's energy demands, low-calorie lignite with a high ash content is generally used in the large capacity coal-fired thermal power plants. As a result of coal firing, wastes such as fly ash, slag, and flue gas are also produced. Subsequently, toxic trace elements within coal are transferred to wastes such as slag, fl...
متن کاملAbundance of Radioactive Elements in Coal and Fly Ash
Coal is largely composed of organic matter, but it is the inorganic matter in coal—minerals and trace elements—that have been cited as possible causes of health, environmental, and technological problems associated with the use of coal. Some trace elements in coal are naturally radioactive. These radioactive elements include uranium (U), thorium (Th), and their numerous decay products, includin...
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ژورنال
عنوان ژورنال: Environmental Science and Pollution Research
سال: 2015
ISSN: 0944-1344,1614-7499
DOI: 10.1007/s11356-015-4111-9