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3 Mineral-Metal Recovery and Recycling Research Group, Mineral Processing Division, Department of Mining Engineering, Suleyman Demirel University, TR32260 Isparta, Turkey. PMID: 26188611 DOI: 10.1016/j.wasman.2015.07.007 Abstract With the increase in environmental awareness, the disposal of any form of hazardous waste has become a …
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The rare earth elements (REEs) are a group of 17 elements sharing similar chemical properties. They include yttrium (Y, atomic number 39), scandium (Sc, atomic number 21), and the 15 elements of the lanthanide series, atomic numbers 57 (lanthanum, La) to 71 (lutetium, Lu). Because promethium (Pm, atomic number 61) does not occur in …
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While the beneficial use of coal ash has these potential benefits, the environmental impacts associated with their use should also be considered. According to an American Coal Ash Association (ACAA) survey of electric utilities, in 2021, at least 35.2 million tons of coal ash were beneficially used. On this page:
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The damage from unencapsulated coal ash disposal, the EPA found, resulted in "by far the largest number of documented cases in the history of the RCRA program [the federal law monitoring waste disposal]." Of the EPA's 158 reports of coal ash contamination with high pollutant releases, at least 22 of the cases were caused by fill.
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The demand for novel, cost-effective, and environmentally friendly rare earth element and yttrium (REY) sources is essential. The recovery of REY and other valuable components from coal fly ash …
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In a paper published in ACS's Environmental Science and Technology on June 23, the Georgia Tech researchers showed that by applying an ionic liquid directly to solid coal fly ash, rare-earth elements …
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DOI: 10.1021/acs.estlett.3c00383 Corpus ID: 261773525; Role of Nanoscale Crystallinity on the Recovery of Rare Earth Elements (REEs) from Coal Fly Ash @article{Gerardo2023RoleON, title={Role of Nanoscale Crystallinity on the Recovery of Rare Earth Elements (REEs) from Coal Fly Ash}, author={Sheila Gerardo and Kevin C. …
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Molybdenum (Mo) is used to produce high tensile strength steel. It is also used as a biocatalyst for plants and animals and it is widely used in the manufacture of super alloys, lubricants, and electronic products. Coal fly ash can provide an alternative source for Mo recovery since some coals are …
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Additionally, a new, quantitative evaluation index for metal recovery potential (MRP) was proposed. The results showed that the model constructed using more elemental properties could more accurately predict metal fractions in coal fly ash (CFA) with an R 2 value of 0.88 achieved on the testing set. The MRP index revealed that the …
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The recovery of REE from coal ash potentially converts the waste to value and supports the circular economy by linking coal mining, electric power, and REE industries. ... (2020b). An integrated approach combines hydrothermal chemical and biological treatment to enhance recycle of rare metals from coal fly ash. Chemical …
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Coal fly ash (CFA) is a highly versatile raw material that has the potential to yield multiple value-added products, including cenospheres, zeolites, carbon nanotubes, and fertiliser substrates.
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The present book deals with various, very significant topics of coal fly ash beneficiation, such as treatment of acid mine drainage with coal fly ash, toxic metal adsorption using coal fly ash, recovery of metals from coal fly ash and phytoreclamation of abandoned acid mine drainage site after treatment with coal fly ash, the status of …
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Coal ash can contain particulates (a mixture of solid particles and liquid droplets found in the air), volatile and semi-volatile organic compounds, and heavy metals. ... The U.S. Environmental Protection Agency regulates coal ash under the Resource Conservation and Recovery Act external icon (RCRA) and the Clean Water Act. RCRA regulates ...
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This article is concerned with a simple hydrometallurgical method for the selective recovery of germanium from fly ash (FA) generated in an integrated gasification with combined cycle (IGCC) process. The method is based on the leaching of FA with water and a subsequent concentration and selective separation of germanium by a solvent …
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Recovery of Rare Earth Elements and Yitrium from non-Magnetic Coal Fly Ash using Acetic Acid Solution ... Thus, the exploration of REY extraction from coal fly ash using organic acid has been proposed in this study. ... Dy, La, Nd, Y and Yb respectively at temperature of 90 0 C pH 1.74 and 120 minutes. For some metals, increasing the ...
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Coal ash is considered as a promising alternative resource for rare earth elements and yttrium (REE + Y or REY) recovery. Coal ash samples (fly ash and bottom ash), as well as corresponding feed ...
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DOI: 10.1016/j.jaap.2024.106465 Corpus ID: 268442747; In-situ adsorptive pyrolysis of e-waste using coal and rice husk fly ash as alternative adsorbents for energy and precious metal recovery by solvent extraction
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Why is coal ash reused? Reusing coal ash can create many environmental, economic, and product benefits including: Environmental benefits such as reduced greenhouse gas emissions, reduced need for disposing in landfills, and reduced use of other materials.; Economic benefits such as reduced costs associated with coal ash …
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Many studies have been published in recent years focusing on the recovery of rare earth elements (REEs) from coal-related materials, including coal, coal refuse, …
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The huge consumption of primary REE sources lead to the scarcity of shortage in supply of REE. The recovery of REE from coal ash potentially converts the …
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Coal fly ash also is considered the USA's largest industrial waste generated in 2014, nearly 130 million tons, most of which is under-utilized (US EPA). Coal fly ash contains several base metals (including Al, Fe and Ca), Si, and materials having applications in superplasticized structural materials and high-strength cement.
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Leaching characteristics of rare metal elements and chlorine in fly ash from ash melting plants for metal recovery Waste Manag. 2009 May;29(5):1532-40. doi: 10.1016/j.wasman.2008.08.014. Epub 2008 Oct 15. Authors ... Coal Ash Metals, Heavy Particulate Matter ...
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Recovery of metals and other beneficial products from coal fly ash: a sustainable approach for fly ash management Prafulla Kumar Sahoo1,2 • Kangjoo Kim2 • M. A. Powell3 • Sk Md Equeenuddin4 Received: 28 September 2015/Revised: 23 February 2016/Accepted: 5 March 2016/Published online: 19 August 2016 The Author(s) 2016.
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1. Introduction. Coal is a traditional fuel used for power production in developing as well as developed countries such as USA, Australia, China, India, etc. (Seredin et al., 2013).Significant amount of coal is also used in pyrometallurgical process for manufacturing iron and steel (Dai and Finkelman, 2018).Consequently, huge amount …
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Fly ash. Coal fly ash, a by-product of coal combustion in thermal power plants, is one of the most complex and abundant of anthropogenic materials. It accounts for 5–20 wt.% of feed coal and is typically found in the form of coarse bottom ash and fine fly ash, which represent 70–85 and 15–30 wt.% of the total ash generated, respectively ...
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A research study has found that the temperatures used in fluidized-bed combustion (FBC) of coal to produce electricity are near optimum for pre-treating the …
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With the rising demand and exhaustion of conventional ores of critical elements, recovery of critical elements from metalliferous coal ash is regarded as a stable alternative source.
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The leaching of valuable metals in coal fly ash and the extraction of metal elements in leachate under different conditions are also summarized. Furthermore, the possibility of coal fly ash to serve as a supplementary source for mineral resources is analyzed, providing a basis for its extensive use as a raw material in the metal industry …
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China is the largest coal consumer around the world, and coal accounts for more than 60% of the country's energy mix (Peng et al. 2018; Wang et al. 2019).Coal fly ash (CFA), a solid waste produced by coal-fired thermal power plants during the combustion of pulverized coal, is currently one of the largest solid wastes in China (Yao …
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The demand for novel, cost-effective, and environmentally friendly rare earth element and yttrium (REY) sources is essential. The recovery of REY and other valuable components from coal fly ash ...
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