scholarly journals Rare Earth Element Contents of High pCO2 Groundwaters of Primorye, Russia: Mineral Stability and Complexation Controls

2005 ◽  
pp. 161-186 ◽  
Author(s):  
Paul Shand ◽  
Karen H. Johannesson ◽  
Oleg Chudaev ◽  
Valentina Chudaeva ◽  
W. Mike Edmunds
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Earth Element ◽  
High Pco2 ◽  
Mineral Stability ◽  
Element Contents

scholarly journals The long-term variations of rare earth element contents in Tamagawa hot spring waters, Akita Prefecture, Japan.

2002 ◽  
Vol 63 (2) ◽  
pp. 135-145 ◽  
Author(s):  
Tetsuya SANADA ◽  
Nobuki TAKAMATSU ◽  
Yuzo YOSHIIKE ◽  
Masayuki IMAHASHI ◽  
Hideo HIGUCHI
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Earth Element ◽  
Hot Spring ◽  
Akita Prefecture ◽  
Element Contents ◽  
Long Term Variations

scholarly journals The Occurrence States of Rare Earth Elements Bearing Phosphorite Ores and Rare Earth Enrichment Through the Selective Reverse Flotation

Minerals ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 698
Author(s):  
Wenxiang Chen ◽  
Feng Zhou ◽  
Hongquan Wang ◽  
Sen Zhou ◽  
Chunjie Yan
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Rare Earth Element ◽  
Earth Element ◽  
Ion Beam ◽  
Western China ◽  
Reverse Flotation ◽  
Flotation Process ◽  
Element Bearing ◽  
Element Contents

The reserve of rare-earth element-bearing phosphorite ores in Guizhou province in western China is huge. Increased demand for the different products manufactured from rare-earth elements has resulted in an extreme need for reasonable and comprehensive extraction of rare-earth elements. An improved understanding of rare-earth element occurrence states in single minerals of ores is important for their further processing. In this paper, rare-earth element contents were analyzed by inductively coupled plasma (ICP), and the occurrence states in single minerals were further investigated through SEM-EDS and focused ion beam-scanning electron microscope (FIB-SEM) methods. The results indicate that rare-earth element contents of apatite are far more than that of dolomite. No independent mineral of rare-earth elements exists for the studied sample. Rare-earth elements are present in the form of ions in the lattices of apatite. Based on the analysis of occurrence states and properties in single minerals, the distribution of rare-earth elements in the flotation process was investigated by reverse flotation technology. It shows that rare-earth elements are mainly concentrated in apatite concentrate. Under the optimized conditions, the P2O5 grade increases from 11.36% in the raw ore to 26.04% in the concentrate, and the recovery is 81.92%, while the total rare-earth oxide grade increases from 0.09% to 0.21% with the recovery of 80.01%, which is similar to P2O5 recovery. This study presents the feasibility of extracting rare-earth elements from rare-earth element-bearing phosphorite ores through the flotation of apatite.

Influence of the temperature of CO2-rich springs on their aluminium and rare-earth element contents

1988 ◽  
Vol 68 (1-2) ◽  
pp. 57-67 ◽  
Author(s):  
Bernard Sanjuan ◽  
Annie Michard ◽  
Gil Michard
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Earth Element ◽  
Element Contents

Rare earth element contents of Jurassic fish and reptile teeth and their potential relation to seawater composition (Anglo-Paris Basin, France and England)

2002 ◽  
Vol 186 (1-2) ◽  
pp. 1-16 ◽  
Author(s):  
Stéphanie Picard ◽  
Christophe Lécuyer ◽  
Jean-Alix Barrat ◽  
Jean-Pierre Garcia ◽  
Gilles Dromart ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Earth Element ◽  
Paris Basin ◽  
Element Contents

Rare earth element contents in lower and higher flora from the Bulgarian region of the black sea

1994 ◽  
Vol 46 (4) ◽  
pp. 229-238 ◽  
Author(s):  
T. Denchev ◽  
L. Petrov ◽  
O. GARCIA Martinez ◽  
S. Dimitrova ◽  
D. Vodenicharov
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Black Sea ◽  
Earth Element ◽  
The Black Sea ◽  
Element Contents

Correlation between terbium and the other rare earth element contents in fern leaves

1998 ◽  
Vol 236 (1-2) ◽  
pp. 35-38 ◽  
Author(s):  
J. Takada ◽  
T. Sumino ◽  
Y. Tanaka ◽  
K. Nishimura ◽  
M. Akaboshi
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Earth Element ◽  
The Other ◽  
Element Contents ◽  
Fern Leaves
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