Unravelling the necessity of conservation and recycling of rare earth elements from the perspective of global need

Bernadsha, S. Bharathi

doi:10.1080/00084433.2022.2046901

Cited by 4 publications

(1 citation statement)

References 54 publications

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“…Moreover, due to the importance of rare earth elements in modern industry, an increase in the demand for these materials may grow, even by around 8% annually [4,5]. Attempts to ensure permanent and stable access to REEs have resulted in an increased interest in technologies that allow the acquisition of these critical raw materials from secondary sources [6,7]. Significant secondary sources include but are not limited to contaminated soil, combustion ashes, mine sediments and tailings, used magnets, and various types of electronic waste [2,8].…”

Section: Introductionmentioning

confidence: 99%

The Latest Achievements of Liquid Membranes for Rare Earth Elements Recovery from Aqueous Solutions—A Mini Review

Kaczorowska

2023

Membranes

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The systematic increase in the use of rare earth elements (REEs) in various technologically advanced products around the world (e.g., in electronic devices), the growing amount of waste generated by the use of high-tech materials, and the limited resources of naturally occurring REE ores resulted in an intensive search for effective and environmentally safe methods for recovering these elements. Among these methods, techniques based on the application of various types of liquid membranes (LMs) play an important role, primarily due to their high efficiency, the simplicity of membrane formation and use, the utilization of only small amounts of environmentally hazardous reagents, and the possibility of simultaneous extraction and back-extraction and reusing the membranes after regeneration. However, because both primary and secondary sources (e.g., waste) of REEs are usually complex and contain a wide variety of components, and the selectivity and efficiency of LMs depend on many factors (e.g., the composition and form of the membrane, nature of the recovered ions, composition of the feed and stripping phases, etc.), new membranes are being developed that are “tailored” to the properties of the recovered rare earth elements and to the character of the solution in which they occur. This review describes the latest achievements (since 2019) related to the recovery of a range of REEs with the use of various liquid membranes (supported liquid membranes (SLMs), emulsion liquid membranes (ELMs), and polymer inclusion membranes (PIMs)), with particular emphasis on methods that fall within the trend of eco-friendly solutions.

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Section: Introductionmentioning

confidence: 99%

The Latest Achievements of Liquid Membranes for Rare Earth Elements Recovery from Aqueous Solutions—A Mini Review

Kaczorowska

2023

Membranes

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A Mechanochemically Synthesized Hybrid Bismuth Halide as Highly Efficient Red Phosphor for Blue Chip‐Based WLED

Zhuang

Lin

Jin

et al. 2023

Advanced Optical Materials

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In recent decades, white light‐emitting diodes (WLEDs) assembled by blue light‐emitting diodes (LEDs) and down‐conversion phosphors have gained rapid development. Thereinto, red phosphors, especially for the ecofriendly and cost‐effective ones, serve an important role for the preparation of superior WLEDs. Herein, a halide compound with a 0D crystal structure, namely [PPh4]2[Bi2Br8(bp4do)(DMSO)2] (BiBrON, PPh4 = tetraphenylphosphonium, bp4do = 4,4′‐bipyridine 1,1′‐dioxide, DMSO = dimethyl sulfoxide) is synthesized at gram scale via a mechanochemical synthesis method. Photophysical properties of BiBrON are investigated in detail. BiBrON has the highest efficiency (78.20%) of red phosphorescence among the Bi‐based halides. The red emission of BiBrON is blue‐light‐excitable with 99.9% color purity and outstanding thermal stability below 400 K. The optical absorption‐emission mechanism in BiBrON is elucidated by the combination study of experiments and density functional theory calculations. BiBrON can be applied as a red phosphor in the blue LED chip‐based WLED with high color rendering index of 87.8, that is higher than the one fabricated utilizing commercial red phosphor (610 nm), and ideal Commission International de l'Eclairage chromaticity coordinate of (0.3282, 0.3311). This work demonstrates for the first time the great potential of Bi‐inorganic–organic hybrid material as phosphors applied for WLED.

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EU-Focused Circular Economy Modelling of Rare Earth Element Waste in Mobile Phone Touch Screens by a System Dynamics Approach

Konyalıoğlu,

Zhang,

Bereketli

2024

Circ.Econ.Sust.

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Unravelling the necessity of conservation and recycling of rare earth elements from the perspective of global need

Cited by 4 publications

References 54 publications

The Latest Achievements of Liquid Membranes for Rare Earth Elements Recovery from Aqueous Solutions—A Mini Review

The Latest Achievements of Liquid Membranes for Rare Earth Elements Recovery from Aqueous Solutions—A Mini Review

A Mechanochemically Synthesized Hybrid Bismuth Halide as Highly Efficient Red Phosphor for Blue Chip‐Based WLED

EU-Focused Circular Economy Modelling of Rare Earth Element Waste in Mobile Phone Touch Screens by a System Dynamics Approach

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