scholarly journals A biosorption-based approach for selective extraction of rare earth elements from coal byproducts

2020 ◽  
Vol 241 ◽  
pp. 116726 ◽  
Author(s):  
Dan Park ◽  
Andrew Middleton ◽  
Ryan Smith ◽  
Gauthier Deblonde ◽  
Dan Laudal ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Selective Extraction

Selective Extraction of Thorium from Rare Earth Elements Using Wrinkled Mesoporous Carbon

2018 ◽  
Vol 140 (44) ◽  
pp. 14735-14739 ◽  
Author(s):  
Zijie Wang ◽  
Alexander T. Brown ◽  
Kui Tan ◽  
Yves J. Chabal ◽  
Kenneth J. Balkus
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Mesoporous Carbon ◽  
Selective Extraction

scholarly journals Environmentally friendly comprehensive hydrometallurgical method development for neodymium recovery from mixed rare earth aqueous solutions using organo-phosphorus derivatives

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Verónica Cristina Arellano Ruiz ◽  
Rambabu Kuchi ◽  
Pankaj Kumar Parhi ◽  
Jin-Young Lee ◽  
Rajesh Kumar Jyothi
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Method Development ◽  
Neodymium Oxide ◽  
Selective Extraction ◽  
Extractant Concentration ◽  
Cyanex 272 ◽  
Extraction Behavior ◽  
Technology Applications ◽  
Hydrometallurgical Method

Abstract Rare earth elements (REEs) have obtained a greatest significant in human lives owing to their important roles in various high technology applications. The present method development was deal technology important REEs such as neodymium, terbium and dysprosium, selective extraction with possible separation and recovery studies, successfully. The chloride mediated mixed aqueous solution containing 1500 mg/L each of REEs such as Nd, Tb and Dy was subjected at selective separation of Nd from other associated REEs. Three organo-phosphorous based commercial extracting agents such as Cyanex 272, PC 88A and D2EHPA, were employed for the extraction, possible separation and recovery of rare earth elements. A comparative extraction behavior of all these three extractants as function of time, pH influence, extractant concentration, temperature and diluents were systematically investigated. The extraction tendency of organo-phosphorus reagents towards the extraction of either of the REEs follows of the sequence as: D2EHPA > PC 88A > Cyanex 272. The thermodynamic behavior of either of the extractants on liquid–liquid extraction processing of REEs was investigated and thermodynamic calculations were calculated and presented. Substantial recovery of neodymium oxalate followed by its calcined product as neodymium oxide was ascertained from XRD study and SEM–EDS analysis.

scholarly journals Selective Extraction of Rare Earth Elements from Permanent Magnet Scraps with Membrane Solvent Extraction

2015 ◽  
Vol 49 (16) ◽  
pp. 9452-9459 ◽  
Author(s):  
Daejin Kim ◽  
Lawrence E. Powell ◽  
Lætitia H. Delmau ◽  
Eric S. Peterson ◽  
Jim Herchenroeder ◽  
...  
Keyword(s):  
Rare Earth ◽  
Solvent Extraction ◽  
Rare Earth Elements ◽  
Permanent Magnet ◽  
Selective Extraction

Peptide–carbon hybrid membranes for highly efficient and selective extraction of actinides from rare earth elements

2021 ◽  
Author(s):  
Yangyang Gao ◽  
Qian Zhang ◽  
Ying Lv ◽  
Sheng Wang ◽  
Meng Men ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Cost Effective ◽  
Selective Extraction ◽  
Hybrid Membrane ◽  
Hybrid Membranes ◽  
Highly Efficient ◽  
Rapid Pressure ◽  
Pressure Driven

A cost-effective peptide–carbon hybrid membrane was developed to selectively extract uranium (U(vi)) and thorium (Th(iv)) from rare earth elements (REEs) through rapid pressure-driven filtration.

scholarly journals Selective Extraction of Rare Earth Elements from Phosphoric Acid by Ion Exchange Resins

Metals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 682 ◽  
Author(s):  
Xavier Hérès ◽  
Vincent Blet ◽  
Patricia Di Natale ◽  
Abla Ouaattou ◽  
Hamid Mazouz ◽  
...  
Keyword(s):  
Rare Earth ◽  
Ion Exchange ◽  
Phosphoric Acid ◽  
Rare Earth Elements ◽  
Moving Boundary ◽  
Cost Effective ◽  
Selective Extraction ◽  
Ion Exchange Resins ◽  
Maximum Sorption Capacity ◽  
Exchange Resins

Rare earth elements (REE) are present at low concentrations (hundreds of ppm) in phosphoric acid solutions produced by the leaching of phosphate ores by sulfuric acid. The strongly acidic and complexing nature of this medium, as well as the presence of metallic impurities (including iron and uranium), require the development of a particularly cost effective process for the selective recovery of REE. Compared to the classical but costly solvent extraction, liquid-solid extraction using commercial chelating ion exchange resins could be an interesting alternative. Among the different resins tested in this paper (Tulsion CH-93, Purolite S940, Amberlite IRC-747, Lewatit TP-260, Lewatit VP OC 1026, Monophos, Diphonix,) the aminophosphonic IRC-747, and aminomethylphosphonic TP-260 are the most promising. Both of them present similar performances in terms of maximum sorption capacity estimated to be 1.8 meq/g dry resin and in adsorption kinetics, which appears to be best explained by a moving boundary model controlled by particle diffusion.

scholarly journals Selective Extraction of Red Phosphor (Y2O3:Eu3+) Constituents from Waste Fluorescent Lamps Phosphor Using Acid Leaching

2018 ◽  
Vol 15 (3) ◽  
Author(s):  
Parul Johar ◽  
Vishal Jangir ◽  
Yogita Choudhary ◽  
Sudhanshu Mallick
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Acid Leaching ◽  
Xrd Analysis ◽  
Selective Extraction ◽  
Phosphor Powder ◽  
Red Phosphor ◽  
Fluorescent Lamps ◽  
Refinement Method ◽  
Lamp Phosphor

Modern fluorescent lamp phosphor powder contains tricolor phosphor. This tricolor phosphor consists of three different types of rare earth phosphors: red (YOX), green (CMAT/LAP) and blue (BAM); mixed in varying proportions. The exact separation of these three rare earth phosphors is essential in order to precisely recover the contained rare earth elements from waste lamps phosphor. In this present work, we reported an efficient methodology for the separation of these three tricolor phosphors and the selective extraction of predominantly presented red phosphor (YOX) constituents using acid leaching. The waste phosphor powder was leached with different acids: both organic and inorganic type. The 3 M H2SO4 leaching was found to be most suitable for the selective extraction of red phosphor constituents, i.e. Y and Eu. The recovered phosphor powder was analyzed with SEM/EDS and XRD analysis. The obtained XRD pattern was refined using Rietveld refinement method for the quantification of phases present. Recovered red phosphor powder contained three main crystalline phases Y2O3, Eu2O3 and Y2OS2. KEYWORDS: Waste Lamp Phosphor; Tricolor Phosphor; Rare Earth Elements; Acid Leaching

scholarly journals Selective recovery of rare earth elements using chelating ligands grafted on mesoporous surfaces

RSC Advances ◽  
2015 ◽  
Vol 5 (126) ◽  
pp. 103782-103789 ◽  
Author(s):  
Justyna Florek ◽  
Ambreen Mushtaq ◽  
Dominic Larivière ◽  
Gabrielle Cantin ◽  
Frédéric-Georges Fontaine ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Organic Molecules ◽  
Selective Extraction ◽  
Chelating Ligands ◽  
Silica Support ◽  
Selective Recovery ◽  
Bite Angle

Novel hybrid sorbents have been designed for the selective extraction of rare earth elements (REEs). The tunning of the ligand bite angle and the grafting of these organic molecules on a silica support allow for selective discrimination of REE ions.

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