Halifax-based Ucore Rare Metals has moved one small step forward in the race to extract rare-earth minerals from oil sands tailings. Oil sands deposits mined from the Athabasca Basin produces a variety of tailings streams that are mostly comprised of coarse silica sand. Contained within the sand is
Specialty metals (such as rare-earth elements) largely cannot be recycled because they are used in small quantities in products with complex elemental compositions, such as computer chips ...
Inside the finest fractions of aggregates, usually wasted by ready mix concrete companies, valuable heavy minerals content is substantial. The concentration and recovery of valuable heavy minerals contained in dredged fine aggregates waste, located in Pyeongtaek South Korea, were investigated to develop a process that can recover …
The demand for rare earth elements (REEs) has significantly increased due to their indispensable uses in integrated circuits of modern technology. However, due to the extensive use of high-tech applications in our daily life and the depletion of their primary ores, REE's recovery from secondary sources is today needed. REEs have now …
The Department of Energy (DOE) today announced nine projects to receive approximately $4 million in cost-shared federal funding to improve the technical, environmental, and economic performance of new and existing technologies that extract, separate, and recover rare earth elements (REEs) from domestic U.S. coal and coal by …
They are usually processed using thermal treatment followed by REMs recovery under optimized conditions of leaching and their extraction via solvent extraction, precipitation, etc. to produce...
Rare earth elements (REE) are a critical and strategic resource of the modern world. As only few primary ore deposits contain recoverable levels of REE (0.03–7.9% …
The rapid depletion of high-grade rare earth elements (REE) resources implies that future supplies may be augmented with low-grade ores, tailings, and other unconventional resources to meet cut-off …
Rare earth elements (REEs) are of vital importance to the world economy due to their widespread applications in various industries 1,2,3.REEs can be categorized as light REEs (LREEs) and heavy ...
On the way to 'zero waste' management: recovery potential of elements, including rare earth elements, from fine fraction of waste. J. Clean. Prod. (2018) D. Guyonnet et al. Material flow analysis applied to rare earth elements in Europe. J. Clean. Prod. ... A review of greener approaches for rare earth elements recovery from mineral …
Rare earth elements are increasingly required for use in modern high-tech components, and primary production is necessary to meet the demand. Reprocessing …
One of these pollutants is zircon sand mining waste (zircon tailing). Due to the concentration of rare earth minerals in zircon tailing and the increasing demand of REE in advanced technologies, studying zircon tailing as a potential source of REE had become an interest for us. ... Recovery of Rare Earth Elements from Apatite Ores by ...
Rare earth-bearing gypsum tailings from the fertilizer industry are a potential source for an economically viable and sustainable production of rare earth elements. Large quantities are generated inter …
Results show that the readsorption of rare earth elements in the barren layer is the main reason for the decrease in rare earth concentration in the leachate, decrease in rare earth recovery and ...
Rare earth elements from heavy mineral sands: assessing the potential of a forgotten resource. G. M. Mudd Environmental Engineering, Monash University, Clayton, ... This study presents a comprehensive assessment of Australian HM sand resources, including an assessment of likely contained monazite, showing that these …
The increasing demand for rare earth elements (REEs), especially from new and innovative technology, has strained their supply, which makes the exploration of new REE sources necessary, for example, the recovery of …
Rare-earth element (REE) demand is expected to increase by a factor of up to 7 by 2040. Recycling avoids the significant hurdles associated with opening new mines, but collection and disassembly of REE-containing devices are barriers. Absolute and relative abundances of REEs and co-occurring constituents differ significantly in secondary compared to …
The biosorption-desorption of multi-components solution obtained from coal power plant ash aqueous solution composed on La, Ce, Er etc. as rare earth ions (REEs) and Li, Fe, Cu, Al as metals were investigated using 450 °C carbonized gingko leaves as low-cost biosorbent.Evaluation of the effect of pH with respect to contact time indicated …
Rare earth elements (REEs) are strategic resources in modern electronics, clean energy, and automotive industries ().Concentrated aqueous acid leaching of the REE minerals, followed by biphasic solvent extraction, has been the dominant scheme for REE mass production ().However, the resource- and pollution-intensive production has a …
The growing demand for rare earth elements (REE) driven by their applications in modern technologies has caused the need to search for alternative sources of these elements as their extraction from traditional deposits is limited. A potential source of light rare earth elements (LREE) may be the monazite present in the mining waste …
Strategies like extracting rare earth elements and making geopolymers from tailings were explored. Techniques like bioleaching and mechanical activation can …
The recovery of rare-earth metals (REMs) is of great economic and environmental interest, because of their high market prices and various industrial applications. Recently, with the increasing demand for high-purity rare-earth compounds, the separation and purification of these elements have gained considerable attention. ...
Monazite is a poorly soluble mineral of rare earth phosphate. It is an ore of the rare earths which is difficult to break down; in industry either concentrated sulphuric acid or caustic soda is used to attack finely ground monazite at between 140 °C and 400 °C. In these processes, the rare earths are converted into different solid compounds, …
Rare-earth elements (REEs) are required for use in modern high-tech applications and demand has increased significantly over the last decade. 1 However, processing of REE ores poses potential hazards to human health and the environment due to challenges in the management of thorium (Th) and uranium (U) in waste products. 2 If …
For recovery of rare earth elements from the NdFeB based permanent magnet scraps, a high temperature process was used. Permanent magnets scraps were firstly oxidized in air. ... In order to accelerate the oxidation process, the NdFeB ingots were pulverized into fine particles mechanically. The particle size was controlled under 150μm. The ...
The introduction of materials from rare-earth elements (REE) developed/advanced the usage of higher magnetic intensity or strength of permanent magnetic separators for beneficiation by the mineral sand industry. 30,54 There have been records of the adoption of several dry and wet magnetic separators for either high or low …
Society's hunger for commodities is leading to an increased consumption of minerals considered critical or strategic. A range of minerals containing elements such as lithium (Li), cobalt (Co), rare earth elements (REEs) are considered critical and more important for strategic uses than others.
2.2.1 Occurrence. Rare earth minerals occur as fluorites, oxides, tantalates, carbonates, phosphates, sulfates, borates, silicates, etc. (Qi 2018).List of different rare earth minerals are presented in Table 2.3.The average concentration of REEs in the earth's crust is found to be 150–220 ppm, which is much higher than the concentration of other …
Microbes used for the recovery of rare earth elements (REEs) from mining wastewater indicated traces of Escherichia coli (E. coli, 2149.6 μg/g), Bacillus sphaericus (1636.6 μg/g), Bacillus mycoides (1469.3 μg/g), and Bacillus cereus (1083.9 μg/g). Of these, E. coli showed an affinity for REEs than non-REEs (Mn and Zn). The amount of …
The demand for valuable metals such as rare earth elements and platinum group metals is rising fast in the context of the depletion of natural resources and international conflicts. Moreover, the future circular economy requires that raw material be recycled from waste by advanced methods such as adsorption by innovative porous …
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