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Other articles where thorium phosphate is discussed: thorium processing: Acidic and alkaline digestion: …aqueous ammonia, first precipitating hydrated thorium phosphate as a gelatinous mass and then metathesizing the thorium phosphate to thorium hydroxide. Finally, the crude thorium hydroxide is dissolved in nitric acid to produce a thorium …
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The dissolution of the thorium phosphate-diphosphate (TPD), which was proposed for the actinides immobilization, was systematically studied as a function of several parameters such as surface, leaching flow, temperature, acidity or basicity of the leachate and phosphate concentration. The dependence of the normalized leaching rate on the …
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· Thorium is a naturally occurring, radioactive substance. In the environment, thorium exists in combination with other minerals, such as silica. Small amounts of thorium are present in all rocks, soil, water, plants, and animals. Soil contains an average of about 6 parts of thorium per million parts of soil (6 ppm). More than 99% of natural thorium …
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· Because of its low solubility in water and high thermal stability, thorium phosphate diphosphate (TPD), Th4 (PO4)4P2O7, seems to be a very good matrix for radionuclide immobilization.
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· The effects of these reactions on the leachability of the rare earths, thorium and phosphate were also examined. It was observed that the sulfation reaction of monazite with acid was virtually complete after baking at 250 °C for 2 h, resulting in >90% solubilisation of rare earth elements, thorium and phosphate.
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· Abstract β -Thorium phosphate diphosphate ( β-TPD), considered as a very promising radwaste storage material, was obtained from thorium phosphate hydrogenphosphate hydrate (TPHPH) precursor through dehydration and hydrogen phosphate condensation.
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sbm thorium phosphate solubleExtraction of rare earth and heavy metals,using ionic. from aqueous solution containing thorium and.(2 ethylhexyl) phosphate Click here to View.that the metal salts are poorly soluble in them.
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· A consolidated and revised database for thermodynamic simulation of lanthanum (representing the rare earth elements), iron, and thorium in water, sulfate, and phosphate systems was built.
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· The removal of rare earth fission products and thorium from LiCl–KCl system is of great significance to purification and recovery LiCl–KCl during pyroprocessing flow. The removal efficiency of rare earth elements or thorium was investigated by adding precipitant Li3PO4 in LiCl–KCl molten salt. The characteristics of precipitation products …
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· The initial raw material is a technical grade thorium sulfate produced industrially from the Brazilian monazite. The monazite sand is attacked with sodium hydroxide transforming the mineral into water-soluble trisodium phosphate and mixed hydroxides of the rare earth elements and of thorium.
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The reaction of monazite with sulfuric acid to form soluble sulfates was practically complete at 250 °C, and was accompanied by >90% dissolution of the rare earths, phosphate, and thorium during leaching.
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· If the acidity is low, thorium phosphate is precipitated but lanthanon remains in solution, lanthanon phosphate being soluble at much lower acidities than thorium phosphate.
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· The irradiated cerium phosphate was soluble in water [35]. Dacheux et al. [4, 36, 37] synthesized thorium phosphate diphosphate (b-TPD) and its uranium solid solutions (b-TUPD).
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· Abstract Contamination of drinking water due to fluoride is a severe health hazard. Present investigation aims to remove fluoride by polycinnamamide thorium (IV) phosphate. Polycinnamamide thorium (IV) phosphate was synthesized by co-precipitation method and was characterized by SEM and FTIR. Dependence of adsorption on …
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