Synthesis of novel GA-g-PAM/SiO2 nanocomposite for the recovery of rare earth elements (REE) ions from aqueous solution

2018 ◽  
Vol 170 ◽  
pp. 251-259 ◽  
Author(s):  
Sidra Iftekhar ◽  
Varsha Srivastava ◽  
Alba Casas ◽  
Mika Sillanpää
Keyword(s):  
Aqueous Solution ◽  
Rare Earth ◽  
Rare Earth Elements

scholarly journals Extraction of Rare Earth Elements from Chloride Media with Tetrabutyl Diglycolamide in 1-Octanol Modified Carbon Dioxide

Metals ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 429 ◽  
Author(s):  
Mary Case ◽  
Robert Fox ◽  
Donna Baek ◽  
Chien Wai
Keyword(s):  
Carbon Dioxide ◽  
Aqueous Solution ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Modern World ◽  
Ndfeb Magnet ◽  
Phosphor Material ◽  
Aqueous Chloride ◽  
Hcl Concentration ◽  
Optimized Conditions

Rare earth elements (REEs) are critical to our modern world. Recycling REEs from used products could help with potential supply issues. Extracting REEs from chloride media with tetrabutyl diglycolamide (TBDGA) in carbon dioxide could help recycle REEs with less waste than traditional solvents. Carbon dioxide as a solvent is inexpensive, inert, and reusable. Conditions for extraction of Eu from aqueous chloride media were optimized by varying moles percent of 1-octanol modifier, temperature, pressure, Eu concentration, TBDGA concentration, Cl− concentration, and HCl concentration. These optimized conditions were tested on a Y, Ce, Eu, Tb simulant material, REEs containing NdFeB magnets, and lighting phosphor material. The optimized conditions were found to be 23 °C, 24.1 MPa, 0.5 mol% 1-octanol, with an excess of TBDGA. At these conditions 95 ± 2% Eu was extracted from 8 M (mol/m3) HCl. Extraction from the mixed REE simulate material resulted in separation of Y, Eu, and Tb from the Ce which remained in the aqueous solution. The extraction on NdFeB magnet dissolved into 8 M HCl resulted in extraction of Pr, Nd, Dy, and Fe >97%. This results in a separation from B, Al, and Ni. Extraction from a trichromatic lighting phosphor leachate resulted in extraction of Y and Eu >93% and no extraction of Ba, Mg, and Al.

scholarly journals Upconversion nanoparticles based on rare-earth elements

2019 ◽  
Vol 220 ◽  
pp. 03033
Author(s):  
Dmitrii Zharkov ◽  
Andrey Leontyev ◽  
Artemii Smelev ◽  
Victor Nikiforov ◽  
Vladimir Lobkov ◽  
...  
Keyword(s):  
Experimental Data ◽  
Aqueous Solution ◽  
Rare Earth ◽  
Laser Radiation ◽  
Rare Earth Elements ◽  
Hydrothermal Method ◽  
Water Soluble ◽  
Upconversion Nanoparticles ◽  
Biological Applications ◽  
Intense Luminescence

Using the hydrothermal method, we synthesized water soluble YVO4: Yb, Er nanoparticles with a size less than 10 nm. Nanoparticles exhibit intense luminescence in the green region due to Er3+ ions when excited by laser radiation at a wavelength of 980 nm as a result of the up-conversion process. Bright and stable luminescence also persists in an aqueous solution of nanoparticles. Based on experimental data, it can be argued that the objects obtained are promising in biological applications, as well as up-conversion phosphors.

scholarly journals Amine Sorbents for Selective Recovery of Heavy Rare‐Earth Elements (Dysprosium, Ytterbium) from Aqueous Solution

ChemPlusChem ◽  
2020 ◽  
Vol 85 (1) ◽  
pp. 130-136 ◽  
Author(s):  
Qiuming Wang ◽  
Brian W. Kail ◽  
Walter C. Wilfong ◽  
Fan Shi ◽  
Thomas J. Tarka ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Heavy Rare Earth ◽  
Selective Recovery ◽  
Heavy Rare Earth Elements ◽  
Amine Sorbents

Rare Earth Elements Ytterbium (III) Adsorption from Aqueous Solution onto the Nanometer Silica Powders

2017 ◽  
Vol 17 (12) ◽  
pp. 9101-9107 ◽  
Author(s):  
Shuxin Liu ◽  
Lin Zhang ◽  
Xiaodong Jiang ◽  
Jingkai Wang ◽  
Yuan Chen
Keyword(s):  
Aqueous Solution ◽  
Rare Earth ◽  
Rare Earth Elements

scholarly journals Recovery of rare earth elements from aqueous solution obtained from Vietnamese clay minerals using dried and carbonized parachlorella

2014 ◽  
Vol 2 (2) ◽  
pp. 1070-1081 ◽  
Author(s):  
Josiane Ponou ◽  
Li Pang Wang ◽  
Gjergj Dodbiba ◽  
Katsunori Okaya ◽  
Toyohisa Fujita ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Clay Minerals

A simple and low-cost route to recycle rare earth elements (La, Ce) from aqueous solution using magnetic nanoparticles of CoxMn1−xFe2O4 (x = 0.2 and 0.8): synthesis, isotherms, kinetics, thermodynamics and desorption

2017 ◽  
Vol 41 (20) ◽  
pp. 11906-11914 ◽  
Author(s):  
Misagh Ghobadi ◽  
Mahdi Gharabaghi ◽  
Hadi Abdollahi ◽  
Amir Shafiee Kisomi
Keyword(s):  
Aqueous Solution ◽  
Rare Earth ◽  
Magnetic Nanoparticles ◽  
Rare Earth Elements ◽  
Surface Area ◽  
Low Cost ◽  
Large Surface Area

Magnetic nanoparticles of CoxMn1−xFe2O4 with a large surface area have been developed for REE cations adsorption.

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