Exchange-resonance transfer of energy from ions of rare-earth elements to organic molecules in the second sphere

1978 ◽  
Vol 29 (3) ◽  
pp. 1137-1142
Author(s):  
E. B. Sveshnikova ◽  
S. P. Naumov
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Organic Molecules ◽  
Exchange Resonance ◽  
Resonance Transfer

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.

Flame spectra of the rare-earth elements*

1962 ◽  
Vol 18 (4) ◽  
pp. 1127-1153
Author(s):  
V FASSEL ◽  
R CURRY ◽  
R KNISELEY
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
The Rare Earth

ESTIMATION OF THE ABUNDANCE AND DISTRIBUTION OF RARE EARTH ELEMENTS IN SOIL AROUND KADUNA REFINING AND PETROCHEMICAL COMPANY USING NUCLEAR TECHNIQUE

2020 ◽  
Vol 4 (2) ◽  
pp. 599-604
Author(s):  
Michael A. Onoja ◽  
P. H. Bukar ◽  
C. U. Omeje ◽  
A. M. Adamu
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Nuclear Technique ◽  
Flood Plains ◽  
Economic Exploitation ◽  
Rare Elements ◽  
Petrochemical Company ◽  
The Moment ◽  
Abundance And Distribution ◽  
Natural Pattern

Instrumental neutron activation analysis (INAA) technique was used to investigate the abundance and distribution of rare earth elements (REE) in soil around Kaduna Refinery. The aim of the study is to assess the rare elements potential of Nigeria for economic exploitation. Five REEs (La, Dy, Eu, Yb, and Lu) were detected in varying concentrations ranging from a minimum of 0.6 µg/g (Lu) to a maximum of 249.0 µg/g (La). The elements existed with trends consistent with the natural pattern of REEs in soil, showing significant Eu and Dy anomalies which characterize upper plains and flood plains. The levels of REEs in soil in the study area were generally slightly above background levels, with minimal (La, Dy, and Eu), moderate (Yb), and significant (Lu) enrichments and trending: Lu ˃Yb ˃ Eu ˃ Dy ˃ La. The abundance of the REEs investigated cannot establish a potential of Nigeria for economic exploitation of the mineral, hence, rare earth project in the study area is not viable at the moment.

Sc, Y, La-Lu Rare Earth Elements

1986 ◽  
Author(s):  
Ingeborg Hinz ◽  
Peter Kuhn ◽  
Ursula Vetter ◽  
Eberhard Warkentin
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements

Sc, Y, La-Lu, Rare Earth Elements

1989 ◽  
Author(s):  
Hiltrud Hein ◽  
Claus Koeppel ◽  
Ursula Vetter ◽  
Eberhard Warkentin
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements
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