Molecular Characterization of Distinct Fungal Communities in the Soil of a Rare Earth Mining Area

2021 ◽  
Author(s):  
Jingjing Liu ◽  
Chun Li ◽  
Wendan Ma ◽  
Wei Liu ◽  
Weixiang Wu
2010 ◽  
Vol 25 (3) ◽  
pp. 204-210 ◽  
Author(s):  
Tomoyasu Nishizawa ◽  
Masakazu Komatsuzaki ◽  
Yoshinori Sato ◽  
Nobuhiro Kaneko ◽  
Hiroyuki Ohta

2018 ◽  
Vol 7 (2) ◽  
pp. 131-137 ◽  
Author(s):  
Yanuar Hamzah ◽  
Muhammad Mardhiansyah ◽  
Liong Nyuk Firdaus

The objective of this research is to determine the rare earth elements (REEs) from themonazite minerals content of several tin tailing sands (TTS)of ex-tin mining area in Kuala Raya Singkep Island, Indonesia. We used the energy dispersive analysis of  X-ray (EDAX)-scanning electron microscopy (SEM) and x-ray diffraction (XRD) to characterize the contents of the samples. The coupled analytical of XRD with SEM/EDX approach enabled to be used for mineralogical identification on the heavy mineral as a rapid determination approach. The analysis of the samples indicates only the presence of REEs including lanthanum (La), cerium (Ce), and thorium (Th) are consistent with the identification of monazite and minerals in the tailing sand. The results show that the average REEs consist of La at 0.2 .%, Ce at 7.8 %, and Th at 2.0% respectively. It is concluded that monazite minerals in TTS has an economic potential to be developed. These monazite minerals can be used as material for semiconductor devices.   


2010 ◽  
Vol 27 (6-7) ◽  
pp. 559-571 ◽  
Author(s):  
Deirdre B. Gleeson ◽  
Karrie Melville ◽  
Frank McDermott ◽  
Nicholas Clipson ◽  
Geoffrey M. Gadd

Author(s):  
G. M. Micha ◽  
L. Zhang

RENi5 (RE: rare earth) based alloys have been extensively evaluated for use as an electrode material for nickel-metal hydride batteries. A variety of alloys have been developed from the prototype intermetallic compound LaNi5. The use of mischmetal as a source of rare earth combined with transition metal and Al substitutions for Ni has caused the evolution of the alloy from a binary compound to one containing eight or more elements. This study evaluated the microstructural features of a complex commercial RENi5 based alloy using scanning and transmission electron microscopy.The alloy was evaluated in the as-cast condition. Its chemistry in at. pct. determined by bulk techniques was 12.1 La, 3.2 Ce, 1.5 Pr, 4.9 Nd, 50.2 Ni, 10.4 Co, 5.3 Mn and 2.0 Al. The as-cast material was of low strength, very brittle and contained a multitude of internal cracks. TEM foils could only be prepared by first embedding pieces of the alloy in epoxy.


2006 ◽  
Vol 175 (4S) ◽  
pp. 467-467
Author(s):  
Victor K. Lin ◽  
Shih-Ya Wang ◽  
Claus G. Roehrbom

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