Quantitative Spectrographic Analysis of the other Rare Earth Elements in Lanthanum Oxide.

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.

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Quantitative spectrographic analysis of the rare earth elements—X

Spectrochimica Acta ◽

10.1016/0371-1951(59)80031-x ◽

1959 ◽

Vol 13 (4) ◽

pp. 303 ◽

Cited By ~ 10

Author(s):

R.N. Kniseley ◽

V.A. Fassel ◽

R.W. Tabeling ◽

B.G. Hurd ◽

B.B. Quinney

Keyword(s):

Rare Earth ◽

Rare Earth Elements ◽

Spectrographic Analysis ◽

The Rare Earth

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The quantitative spectrographic analysis of the rare earth elements

10.31274/rtd-180813-13995 ◽

1947 ◽

Author(s):

Velmer Arthur Fassel

Keyword(s):

Rare Earth ◽

Rare Earth Elements ◽

Spectrographic Analysis ◽

The Rare Earth

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

PeerJ ◽

10.7717/peerj.10853 ◽

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.

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

MATEC Web of Conferences ◽

10.1051/matecconf/201926907003 ◽

2019 ◽

Vol 269 ◽

pp. 07003 ◽

Cited By ~ 2

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.

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

MRS Proceedings ◽

10.1557/proc-26-951 ◽

1983 ◽

Vol 26 ◽

Cited By ~ 2

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.

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