Potentially toxic elements and rare earth elements in sandy soils from the Brazilian Cerrado

2021 ◽  
Vol 193 (12) ◽  
Author(s):  
Vanessa Martins ◽  
Ronny Sobreira Barbosa ◽  
Ozeas S Costa Jr ◽  
Yuri Jacques Agra Bezerra da Silva ◽  
Ygor Jacques Agra Bezerra da Silva ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Toxic Elements ◽  
Sandy Soils ◽  
Potentially Toxic Elements ◽  
Brazilian Cerrado

scholarly journals Two-Step Solvent Extraction of Radioactive Elements and Rare Earths from Estonian Phosphorite Ore Using Nitrated Aliquat 336 and Bis(2-ethylhexyl) Phosphate

Minerals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 388
Author(s):  
Silvester Jürjo ◽  
Liis Siinor ◽  
Carolin Siimenson ◽  
Päärn Paiste ◽  
Enn Lust
Keyword(s):  
Rare Earth ◽  
Solvent Extraction ◽  
Rare Earth Elements ◽  
Toxic Elements ◽  
Downstream Processing ◽  
Liquid Extraction ◽  
Aliquat 336 ◽  
Radioactive Elements ◽  
Improved Method ◽  
Ph Values

Estonian phosphorite ore contains trace amounts of rare earth elements (REEs), many other d-metals, and some radioactive elements. Rare earth elements, Mo, V, etc. might be economically exploitable, while some radioactive and toxic elements should be removed before any other downstream processing for environmental and nutritional safety reasons. All untreated hazardous elements remain in landfilled waste in much higher concentration than they occur naturally. To resolve this problem U, Th, and Tl were removed from phosphorite ore at first using liquid extraction. In the next step, REE were isolated from raffinate. Nitrated Aliquat 336 (A336[NO3]) and Bis(2-ethylhexyl) Phosphate (D2EHPA) were used in liquid extraction for comparison. An improved method for exclusive separation of radioactive elements and REEs from phosphorite ore in 2-steps has been developed, exploiting liquid extraction at different pH values.

scholarly journals Influence of toxic elements on the simultaneous uptake of rare earth elements from contaminated waters by estuarine macroalgae

Chemosphere ◽  
2020 ◽  
Vol 252 ◽  
pp. 126562 ◽  
Author(s):  
Marcelo Costa ◽  
Bruno Henriques ◽  
João Pinto ◽  
Elaine Fabre ◽  
Mariana Dias ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Toxic Elements ◽  
Contaminated Waters

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
Sign in / Sign up

Export Citation Format

Share Document