Results 271 to 280 of about 16,338 (322)

Bioleaching for critical metal recovery from bauxite residue- unlocking waste valorization. [PDF]

Front Bioeng Biotechnol
Soto-Montandon F, Gillane R, Marcellin E, Harrison STL, Villa-Gomez D.   +4 more
europepmc   +1 more source

Utilizing Deep Eutectic Solvents in the Recycle, Recovery, Purification and Miscellaneous Uses of Rare Earth Elements. [PDF]

Molecules
Alguacil FJ.
europepmc   +1 more source

Overview of naturally occurring radioactive materials (NORM) in mineral processing industries and consideration of ionising radiation in life cycle assessment - Part I. NORM inventory. [PDF]

Radiat Environ Biophys
Dvorzhak A, Ugolini R, Venoso G, Leonardi F, Michalik B, Real A, Escribano A, Pérez-Sánchez D, Vanhoudt N, Kallio A, Nuccetteli C, Trotti F, Trevisi R, Fevrier L, Popic JM.   +14 more
europepmc   +1 more source

Predicting the presence of tephra layers in lacustrine deposits using spectral gamma ray data: An example from Lake Chalco, Mexico City. [PDF]

PLoS One
Sardar Abadi M, Zeeden C, Ulfers A, Meyer AS, Wonik T, Mexidrill team.   +5 more
europepmc   +1 more source

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Natural Thorium Resources and Recovery: Options and Impacts

Nuclear Technology, 2016
This paper reviews the front end of the thorium fuel cycle, including the extent and variety of thorium deposits, the potential sources of thorium production, and the physical and chemical technolo...
Timothy Ault, Bradley Van Gosen, Steven Krahn, Allen Croff   +3 more
openaire   +1 more source

Study on thorium recovery from bastnaesite treatment process

Journal of Rare Earths, 2012
Abstract Thorium (Th) stripping behavior from HEH/EHP (2-(ethylhexyl) phosphoric acid mono-2-ethylhexyl ester) with H 2 SO 4 , HCl and HNO 3 were investigated. The results indicated that H 2 SO 4 was the most effective stripping reagent compared with HCl and HNO 3 . Selecting H 2 SO 4 as the stripping reagent, the effect of phase ratio, acidity, H
Yongqi ZHANG, Yang XU, Xiaowei HUANG, Zhiqi LONG, Dali CUI, Feng HU   +5 more
openaire   +1 more source

The recovery of thorium-230 from uranium wastes

Journal of Inorganic and Nuclear Chemistry, 1957
Abstract A solvent extraction with dibutyl carbitol and tributyl phosphate (TBP) cycles has been used to recover thorium with a 230 Th content of 12 per cent from a solid hydroxide waste, containing 6 p.p.m. 230 Th, which has arisen from the extraction of uranium from pitchblende. A process consisting of successive counter-current extraction cycles
D.J. Carswell, J.M. Fletcher, D.W. Clelland   +2 more
openaire   +1 more source

Recovery of thorium from sulphate solutions by anion exchange

Journal of Applied Chemistry, 1959
AbstractThe passage of solutions containing uranyl and thorium sulphate through columns of De‐Acidite FF strongly basic anion‐exchange resin results in the initial absorption of both metals as complex anions, followed by the qualitative displacement of thorium by uranium.
T. V. Arden, J. D. Nolan, B. J. Gower, V. A. Wright   +3 more
openaire   +1 more source

Recovery of uranium, thorium and rare earth from industrial residues

Hydrometallurgy, 2018
Abstract This paper addresses the development of a process to recovery uranium, thorium and rare earth elements from an industrial residue, with a subsequent removal of U and Th from the liquor generated. Sulfuric acid digestion followed by water leaching was found to be the best method to solubilise the metals.
Janúbia C.B.S. Amaral, Michelle L.C.G. Sá, Carlos A. Morais   +2 more
openaire   +1 more source

The Recovery of Trace Thorium from Large Quantities of Uranium

Solvent Extraction and Ion Exchange, 2009
This work describes the chromatographic separation of trace amounts of Thorium (mg or less) from large quantities of Uranium (g or kg). The separation method employs extraction chromatographic materials containing tetra(n‐octyl)diglycolamide (TODGA) and quaternary amine extractants.
E. Philip Horwitz, Daniel R. McAlister
openaire   +1 more source