Reductive Dissolution of a Lateritic Ore Containing Rare Earth Elements (REE) Using Acidithiobacillus Species

2017 ◽  
Vol 262 ◽  
pp. 299-302
Author(s):  
Ivan Nancucheo ◽  
D. Barrie Johnson ◽  
Manoel Lopes ◽  
Guilherme Oliveira
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Mineral Dissolution ◽  
The Other ◽  
Reductive Dissolution ◽  
Valuable Metals ◽  
Lateritic Ore

Lateritic deposits containing rare earth elements (REE) are important resources in Brazil, where monazite is the main REE-bearing mineral and is frequently associated with iron hydroxy-oxides and quartz. In order to recover valuable metals such as REE and uranium, experiments were carried out under reductive mineral dissolution using Acidithiobacillus species. In terms of phosphate, aerobic reductive dissolution at pH 0.9 using A. thiooxidans extracted about 35% of that present in the ore which is and indicator of the dissolution of monazite. Although only ~9% of the cerium and 5% of the lanthanum were extracted, ~72% of the uranium was solubilized, indicating that it was more susceptible to extraction by reductive dissolution than the other two REE.

scholarly journals Recovery of Metals and Rare Earth Elements by Microwave heating Technology - A Review

2020 ◽  
Vol 7 (3) ◽  
pp. 196-206
Author(s):  
Shunda Lin ◽  
Mamdouh Omran ◽  
Shenghui Guo
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Microwave Heating ◽  
Industrial Applications ◽  
Metallurgical Waste ◽  
Microwave Technology ◽  
Valuable Metals ◽  
Rare Earth Minerals ◽  
Save Energy ◽  
Heating Technology

: Microwave heating technology is considered one of the most likely to replace traditional heating methods due to its efficient, quick, and green heating transmission that meets the requirements of sustainable development. Microwave heating can strengthen chemical reactions and change the morphology of minerals, and it can save energy and achieve rapid and efficient heating, clean production, and emission reduction. Therefore, this paper summarizes the research status of microwave heating in the recovery of valuable metals (Cu, Au, V),) from metallurgical waste ore and rare earth elements from rare earth minerals in recent years, expounds the principle of microwave heating, and summarizes the previous experimental phenomena. Finally, the development potential, opportunities, and difficulties of microwave technology in future industrial applications are discussed.

scholarly journals Distribution, fractionation and sources of rare earth elements in suspended particulate matter in a tropical agricultural catchment, northeast Thailand

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e10853
Author(s):  
Kunhua Yang ◽  
Guilin Han ◽  
Jie Zeng ◽  
Wenxiang Zhou
Keyword(s):  
Rare Earth ◽  
Particulate Matter ◽  
Rare Earth Elements ◽  
Suspended Particulate Matter ◽  
The Other ◽  
Mekong River ◽  
Northeast Thailand ◽  
Eu Anomaly ◽  
Suspended Particulate ◽  
The Relationship

Forty-eight suspended particulate matter (SPM) samples were collected from the Mun River, northeast Thailand and its junction with the Mekong River, to investigate the relationship between the distribution of rare earth elements (REE) in SPM and the soils in the watershed. The total REE contents (∑REE) in SPM in the Mun River ranged from 78.5 to 377.8 mg/kg with the average of 189.3 mg/kg, which was lower than ∑REE of 222.3 mg/kg at the Mekong River (one sample at junction). The Post Archean Australia Shale (PAAS)-normalized ratios of light REE (LREE), middle REE (MREE) and heavy REE (HREE) were averaged to 1.0, 1.3 and 1.0, which showed a clear enrichment in MREE. In short, along the Mun River, the REE contents in SPM were decreasing, and the PAAS-normalized patterns of REE showed gradually flat. The REE content in SPM and soils are highest in the upper catchment, indicating that soil/bedrock is the most important source of REE in SPM. Additionally, the positive Eu anomaly was enhanced by the higher Ca content in SPM (R = 0.45), which may be caused by more feldspars or carbonates with Ca and Eu substituting Ca. The results present the REE behaviors of SPM in the Mun River and relationship between REE in SPM and soil/bedrock, the findings may support the other studies in catchment weathering.

scholarly journals Initial Study for Cerium and Lanthanum Extraction from Bangka Tin Slag through NaOH and HClO4 Leaching

2019 ◽  
Vol 269 ◽  
pp. 07003 ◽  
Author(s):  
Badrul Munir ◽  
Sulaksana Permana ◽  
Anggita Amilia ◽  
Ahmad Maksum ◽  
Johny W Soedarsono
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Initial Study ◽  
The Other ◽  
Water Quenching ◽  
Other Hand ◽  
Global Demand ◽  
Tin Slag

The global demand for rare earth elements have increased dramatically for the last decade as more and more devices use rare earth elements as key for their advanced properties. The paper explores the possibilty to recover cerium (Ce) and lanthanum (La) in Bangka tin slag (BTS) involving roasting at 900°C, water-quenching, and two leachings, 8M NaOH leaching and HClO4 leaching at concentrations of 0.1M, 0.4M, and 0.8M. HClO4 leaching causes Ce and La contents to decrease to 0.47% for 0.1M, 0.51% for 0.4M, and 0.59% for 0.8M. On the other hand, 8M NaOH optimizes cerium and lanthanum contents up to 4.35% and 1.45%, respectively.

Chemical Migration by Contact Metamorphism between Pegmatite and Country Rocks: Natural Analogs for Radionuclide Migration

1983 ◽  
Vol 26 ◽  
Author(s):  
J. C. Laul ◽  
R. J. Walker ◽  
C. K. Shearer ◽  
J. J. Papike ◽  
S. B. Simon
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
South Dakota ◽  
Trace Element ◽  
Black Hills ◽  
The Other ◽  
Contact Metamorphism ◽  
Relative Degree ◽  
Radionuclide Migration ◽  
Other Hand

ABSTRACTComparison of trace element signatures of country rocks as a function of distance from the contact with two pegmatites, Tin Mountain and Etta, in the Black Hills of South Dakota, suggests that some elements such as K, Li, Rb, Cs, As, Sb, Zn and Pb, have migrated to distances of 4 to 40 meters during contact metamorphism. The relative degree of migration varies depending on the element. On the other hand, there is virtually no migration of rare earth elements (REE), Al, Sc, Cr, Hf, U, and Th. Biotite and muscovite are effective trace element traps for Li, Rb and Cs. Biotite has a greater affinity for Rb, Cs and Li than muscovite.

Biotechnological Recovery of Valuable Metals from Lignite Ash

2015 ◽  
Vol 1130 ◽  
pp. 664-667
Author(s):  
Sabrina Hedrich ◽  
Sören Bellenberg ◽  
René Kermer ◽  
Tilman Gehrke ◽  
Wolfgang Sand ◽  
...  
Keyword(s):  
Power Generation ◽  
Rare Earth ◽  
Sulfuric Acid ◽  
Rare Earth Elements ◽  
Gluconic Acid ◽  
Bacillus Circulans ◽  
Iron Reducing Bacteria ◽  
Valuable Metals ◽  
Different Types ◽  
Reducing Bacteria

Ashes from lignite combustion for power generation contain considerable amounts of strategic metals, metalloids and rare earth elements. Within the presented project bioleaching with different types of microorganisms was investigated to recover valuable metals from lignite ashes. An increased mobilization of several metals ions was observed with the gluconic acid-producing bacteriumAcetobacter methanolicusand the silicate-solubilizing bacteriumBacillus circulans. Most promising results were achieved with sulfuric acid-producing microorganisms and bioleaching could even be increased at higher temperatures or by reductive bioleaching using acidophilic, iron-reducing bacteria.

The geochemistry of loveringite, a uranium-rare-earth-bearing accessory phase from the Jimberlana Intrusion of Western Australia

1978 ◽  
Vol 42 (322) ◽  
pp. 187-193 ◽  
Author(s):  
I. H. Campbell ◽  
P. R. Kelly
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Western Australia ◽  
Late Stage ◽  
The Other ◽  
Cr Content ◽  
Accessory Phase ◽  
Olivine Cumulates ◽  
Strong Depletion

SummaryThe distribution and geochemistry of loveringite, an accessory Ti, Fe±Cr oxide containing U and rare-earth elements (Ln) from the Jimberlana Intrusion, have been studied. Loveringite is most abundant in bronzite cumulates; it is found in trace amounts in early plagioclase-augite-hypersthene cumulates, but is not found in the olivine cumulates or in the late-stage differentiates. Loveringites from the bronzite cumulates have a high Cr content compared with those from the plagioclase-augite-hypersthene cumulates, suggesting that the mineral is stabilized by the presence of Cr in the intercumulus liquid. The Ln pattern shows a strong depletion trend from La to Eu, a sharp reversal between Eu and Tb and a second depletion pattern from Tb to Lu. This pattern suggests that the Ln are substituting into two sites, one much larger than the other.

Separation of scandium from the other rare earth elements with a novel macro-porous silica-polymer based adsorbent HDEHP/SiO2-P

2019 ◽  
Vol 185 ◽  
pp. 117-124 ◽  
Author(s):  
Wei Zhang ◽  
Shuqi Yu ◽  
Shichang Zhang ◽  
Jie Zhou ◽  
Shunyan Ning ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Porous Silica ◽  
The Other

scholarly journals Best Practices of Russia and Finland in Extracting REE from Fertilizer Waste

2017 ◽  
Vol 2 (2) ◽  
pp. 168
Author(s):  
Vladimir Rychkov ◽  
Pertti Koukkari ◽  
Sergey Kirillov ◽  
Evgenii Kirillov
Keyword(s):  
Rare Earth ◽  
Best Practices ◽  
Rare Earth Metals ◽  
The Other ◽  
Raw Material ◽  
Added Value ◽  
Waste Stream ◽  
Valuable Metals ◽  
Inorganic Waste ◽  
Modern Technologies

<p>In the production of fertilisers and commodity metals large amounts of stabilised waste is generated. Conventionally, manufacturing is targeted at the recovery of economically and technically most attractive key elements while the inorganic waste stream will gather all the other added-value chemical quantities. For example, substantial amounts of <em>rare earth metals</em>, which are increasingly used in various modern technologies including cleantech and photonics are present in <em>phosphogypsum</em>, the voluminous waste of the worldwide fertiliser industry. The waste heaps, while generally stabilised against weathering, appear usually granular or even as powder-like fines. Thus they represent a readily comminuted raw material for innovative mechanical, hydrometallurgical, biohydrometallurgical and pyrometallurgical techniques to recover considerable amounts of valuable metals and metal concentrates.</p>

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