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(PDF) Recent advances in the approaches to recover rare …

Recent advances in the approaches to recover rare earths and precious metals from E‐waste: A mini‐review May 2022 The Canadian Journal of Chemical Engineering 101(2)

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Selective recovery of rare earth elements from aqueous solution

As far as leaching of rare earth elements from coal ashes is concerned, various researchers studied several leaching processes, Rabie et al. and Panda et al. [18], [16] developed a process for separation of europium (Eu) from middle rare earth concentrates derived from Egyptian black sand monazite, which involve hydrochloric acid leaching followed by selective …

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Recovery of Rare Earth Metals (REMs) from Primary and …

Rare earth metals (REMs) play a significant role in the manufacture of permanent magnets, fluorescent lamps, catalysts, medicines, super alloys etc. Recently, China, which controls 97% of world ...

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(PDF) Recovery of Rare Earth Elements from …

A potential source of light rare earth elements (LREE) may be the monazite present in the mining waste generated in the Bagre-Nechí mining district in Colombia due to the processing of sands...

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Review on hydrometallurgical recovery of rare earth metals

The commercial extraction of rare earth metals from different leached solutions (chloride, nitrate, thiocyanate, etc.) using different cationic, anionic and solvating extractants viz. D2EHPA, Cyanex 272, PC 88A, Versatic 10, TBP, Aliquat 336, etc. Rare earth metal recovery from different leached solutions such as chloride, nitrate, and ...

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A green and efficient technology to recover rare earth …

Here we report the design of an innovative REE mining technique, electrokinetic mining (EKM), which enables green, efficient and selective recovery of REEs from weathering …

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(PDF) Process development to recover rare earth metals …

Present review reports the commercial processes based on pyro–hydro or hybrid techniques as well as systematic research for process development to recover rare earth from …

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(PDF) Recovery of Rare Earth Elements from …

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 ...

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A review of greener approaches for rare earth elements recovery …

Rare earth elements (REE), which are used in high technology, clean energy, military defense, and medical technology products and have high magnetic, electronic, catalytic, and optical properties, are obtained from ores termed as a primary source or from mineral wastes, e-wastes and, wastewaters, are termed as secondary sources containing REE (Yuksekdag et …

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Selective separation and recovery of rare-earth elements …

A collection of 17 elements (lanthanides plus yttrium and scandium) know as rare-earth elements (REEs) have garnered significant recent scientific interest owing to their distinct physicochemical properties and their use in a broad spectrum of industrial applications including fluorescent glass, petroleum refining catalysts, rechargeable batteries, semiconductors, high …

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Mechanisms of biological recovery of rare-earth elements …

The rare earth elements (REE) have seen an increasing demand in the past decade because of their extensive use in advanced technology and production related to electronics (e.g., cellphones, flat-screen televisions), in renewable energy capture devices (e.g., solar panels), biomedical devices, and other industrial products.

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On the way to 'zero waste' management: Recovery potential of elements

Request PDF | On the way to 'zero waste' management: Recovery potential of elements, including rare earth elements, from fine fraction of waste | Existing schemes of solid waste handling have ...

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Strategies for Hydrocarbon Removal and …

Oil sand tailings from bitumen extraction contain various contaminants, including polycyclic aromatic hydrocarbons, BTEX, and naphthenic acids, which can leak into surrounding environments, threatening aquatic …

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Generating cash from tailings: A "green chemistry" approach …

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

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Rare Earth Elements Recovery from Primary and …

Flotation—a method that separates materials based on differences in their surface wettability—is a process applied for both mineral processing and recycling of REEs, especially when the particles are fine and/or a high-purity …

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Mineral Processing of Rare Earth Ores | SpringerLink

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 base metals …

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Recovery of rare earth elements from spent fluid catalytic …

A hydrochloric leaching process was applied to recover rare earth elements (REEs, mainly La and Ce) from spent fluid catalytic cracking (FCC) catalysts using H 2 O 2.The Ce of CeO 2 in FCC catalyst is firstly reduced to Ce 3+ ions with H 2 O 2, and then it is easily leached out by HCl acid.Followed by ion exchange extraction with octyl phosphate, precipitation with …

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Recovery of high-value rare earth elements from waste …

Rare earth elements are a nonrenewable strategic resource [1].However, undirected development in recent years has caused a serious waste of rare earth resources and irreversible damage to such resources, the supply gap of some rare earth elements is widening year by year [2].Recycling rare earth elements from urban or industrial waste is crucial to moving from a …

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Recovery of rare-earth and radioactive elements from …

Global rare-earth element (REE) supply and recovery technologies have become an important issue because REEs are precious materials for economic growth, environmental protection, and national security [1], [2].REEs are chemically similar metallic elements, including the 15 lanthanides, yttrium, and scandium [3], which are widely used in high-tech industries, …

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(PDF) Recovery of Light Rare Earth Elements (LREE) from …

Fig. 2 Elemental mapping of monazite sand s. ... This step improved the rare earth elements recovery in the precipitate from 90.2(1) and 101.68(3) %, while the impurities concentrations remained ...

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Recovery of rare-earth metals from aqueous solutions by …

The recovery of rare-earth elements is interesting because of their high market prices, along with their various industrial applications. 4 Recently, with the increasing demand for high-purity rare-earth compounds, the separation and purification of these elements have gained considerable attention in the scientific world. 7 Few countries ...

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(PDF) Recovery of Rare Earth Elements from Spent NdFeB …

China's dominance in rare earth production and supply along with an increase in the available NdFeB magnets in the market [1], strongly motivates the recovery of rare earth elements from secondary ...

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Sustainable recovery of rare earth elements by recycling of …

Chapter 15 - Sustainable recovery of rare earth elements by recycling of E-waste for a ... India is the third-largest producer of monazite sand which is rich in only La and Ce. In fact, elements like Nd, Dy, Sm, Eu, Tb, and Y are more in demand for the above industrial applications. ... crushing of those parts to fine powder, (iii) leaching by ...

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A comprehensive review on treatment and recovery of rare earth elements

Recovery of rare earth metals through biosorption: an overview: Das N: Journal of Rare Earths: ... spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), extended X-ray absorption fine structure (EXAFS), and X-ray absorption near-edge structure (XANES) can be utilized for characterizing the adsorbent structure ...

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(PDF) Microbial recovery of rare earth elements

Rare earth elements (REE) have applications in various modern technologies, e.g., semiconductors, mobile phones, magnets. They are categorized as critical raw materials due to their strategic ...

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Biohydrometallurgy for Rare Earth Elements Recovery from …

Biohydrometallurgy recovers metals through microbially mediated processes and has been traditionally applied for the extraction of base metals from low-grade sulfidic ores. New …

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A critical review of the recovery of rare earth elements from

Rare earth elements (REEs) are a family of fifteen metallic elements of the lanthanides, yttrium (Y), and scandium (Sc) that exhibit pronounced chemical similarities. However, REEs vary in their atomic structures and states, resulting in unique chemical and physical properties ( Cheisson and Schelter, 2019 ).

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Research on the Hierarchical Separation of Rare Earths and …

Lithium is an important non-renewable resource, and the study of the tiered separation of rare earths and lithium from rare earth molten salt slag is an important approach to solving the current global resource shortage. This article adopts a sulfuric acid leaching process and a lithium-containing solution iron lithium extraction separation process to recover lithium …

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Various microbes used for the recovery of rare earth elements …

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 heavy REEs …

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Precipitation of rare earth elements from acid mine drainage …

Rare earth elements (REEs) are a group of 17 elements, including the 15 lanthanides along with scandium and yttrium, with similar physicochemical properties [1].Except for La, Ce, Gd, and Lu, the d-orbital is not part of the electron configuration of lanthanides, in which the f-orbital is being filled, and the outermost shell remains the same as the atomic …