Results 241 to 250 of about 16,298 (289)

Fractionation mechanisms of rare earth element speciation in granitic weathering profiles: Metallogenic implications for the kuanyu ion-adsorption REE deposit, dechang, SW China. [PDF]

PLoS One
Qian L, Ou L, Li G, Xiao X, Qian B.
europepmc   +1 more source

Carbon Dioxide as a Sustainable Reagent in Circular Hydrometallurgy. [PDF]

ChemSusChem
Rivera RM, Binnemans K.
europepmc   +1 more source

Study of the Chemical Recovery and Selectivity against U in the Radiochemical Separation of Th with Tri-n-butyl Phosphate by Varying the Proportion of Xylene and HCl Concentration. [PDF]

Molecules
Expósito-Suárez VM, Suárez-Navarro JA, Benavente JF.   +2 more
europepmc   +1 more source

Research Progress on the Alkaline Medium Decomposition Process of Rare Earth Concentrates. [PDF]

ACS Omega
Zhou L, Zhang F, Wang J, Zhao Z, Sang X, Chang H.   +5 more
europepmc   +1 more source

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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   +3 more sources

Selective Recovery of Uranium and Thorium Ions from Dilute Aqueous Solutions by Animal Biopolymers

Biological Trace Element Research, 2002
Selective actinide ion recovery from dilute, aqueous, multication waste streams is an important problem. The recovery of uranium (U) and thorium (Th) by various animal biopolymers was examined. Of four species of biopolymers tested, a high uptake of uranium and thorium was found in hen eggshell membrane (ESM) and silk proteins, with the maximum uranium
Shin-ichi, Ishikawa, Kyozo, Suyama, Keizo, Arihara, Makoto, Itoh   +3 more
openaire   +4 more sources

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
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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