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Previous work on radium removal from mill tailings and on radioactive disequilibrium in uranium deposits is critically reviewed in relation to these mechanisms. Fresh …
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Previous work on radium removal from mill tailings and on radioactive disequilibrium in uranium deposits is critically reviewed in relation to these mechanisms. Fresh data are presented, indicating the roles of charge-depressant ions and of organic complexing agents in radium removal.
WhatsApp: +86 18221755073
Up to 85% of the radium could be removed by crosscurrent or countercurrent contacting with nitric acid or DTPA solutions.
WhatsApp: +86 18221755073
Radium Removal from Uranium Ores and Mill Tailings. Mill tailings from conventional uranium extraction processes contain nearly all of the radium originally in the ore. Such tailings require …
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The various mechanisms by which radium can be retained by uranium mill tailings are discussed. These include coprecipitation (solid solutions), adsorption on silica and hydroxides, ion exchange in clay minerals, and retention in pores.
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The determination of radium by the emanation method involves separating radium emanation (as a gas) from its parent radium, and measuring its quantity in a gas-tight electroscope previously standardized with a known amount of radium emanation.
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It is probable that some of the early experimental work on extracting radium from carnotite ore involved the boiling of the ore with sodium carbonate, thereby getting rid of most of the uranium and part of the vanadium.
WhatsApp: +86 18221755073
The determination of radium by the emanation method involves separating radium emanation (as a gas) from its parent radium, and measuring its quantity in a gas-tight electroscope previously standardized with a known amount of radium emanation.
WhatsApp: +86 18221755073
Nitric acid leaching of representative uranium ores and mill tailings from the western U.S. mining districts removes up to 98% of the /sup 226/Ra and /sup 230/Th, yielding a residue containing 17 to 60 pCi of radium per gram.
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20 EXTRACTION OF RADIUM, URANIUM' AND VANADIUM. ore is changed to sodium uranate, which can be dissolved from the insoluble residue, after leaching with water, by means of dilute sul-phuric acid. The radium remains behind with …
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Radium Removal from Uranium Ores and Mill Tailings. Mill tailings from conventional uranium extraction processes contain nearly all of the radium originally in the ore. Such tailings require controlled storage in perpetuity to safeguard the surrounding …
WhatsApp: +86 18221755073
The various mechanisms by which radium can be retained by uranium mill tailings are discussed. These include coprecipitation (solid solutions), adsorption on silica and …
WhatsApp: +86 18221755073
A hydrochloric acid leaching method was used to extract both radium and uranium from the ore to yield tailings containing less radium than those produced by either conventional sulfuric acid or alkaline leaching processes.
WhatsApp: +86 18221755073
Up to 85% of the radium could be removed by crosscurrent or countercurrent contacting with nitric acid or DTPA solutions.
WhatsApp: +86 18221755073
A hydrochloric acid leaching method was used to extract both radium and uranium from the ore to yield tailings containing less radium than those produced by either conventional sulfuric acid or …
WhatsApp: +86 18221755073
It is probable that some of the early experimental work on extracting radium from carnotite ore involved the boiling of the ore with sodium carbonate, thereby getting rid of most …
WhatsApp: +86 18221755073
Radium may be removed by adsorption on manganese dioxide and uranium may be removed by liquid extraction with D2EHPA (DAPEX process). The ferric chloride may be recirculated for …
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Radium may be removed by adsorption on manganese dioxide and uranium may be removed by liquid extraction with D2EHPA (DAPEX process). The ferric chloride may be recirculated for further leaching, with reduction before the uranium extraction and reoxidation afterwards.
WhatsApp: +86 18221755073
Nitric acid leaching of representative uranium ores and mill tailings from the western U.S. mining districts removes up to 98% of the /sup 226/Ra and /sup 230/Th, yielding a residue containing …
WhatsApp: +86 18221755073
20 EXTRACTION OF RADIUM, URANIUM' AND VANADIUM. ore is changed to sodium uranate, which can be dissolved from the insoluble residue, after leaching with water, by means of dilute sul-phuric acid. The radium remains behind with the residue, and was, before the discovery of radium, discarded. PROCEDURE OF HAITINGER AND ULRICH.
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