Removal of uranium and radium from uranium ores by using sodium containing molten salts

Nobuaki Sato; Tomihiro Taki; Kohta Yamada; Takeo Fujino

Removal of uranium and radium from uranium ores by using sodium containing molten salts

Nobuaki Sato, Tomihiro Taki, Kohta Yamada, Takeo Fujino

Division of Process and System Engineering

Research output: Contribution to conference › Paper › peer-review

Abstract

Separation study of uranium and radium as their mixed oxides from the uranium ores was conducted by the reaction with NaCl or NaOH molten salts followed by leaching with dilute HNO₃ with the aim of decontamination of the ore tailing. When the ore was heated in the NaCl melt bubbling with nitrogen or oxygen, even though 50% of uranium remained in the residue, the amount of radium in the residue was selectively reduced to 5-8%. In the case of NaOH melt, on the other hand, the amount of uranium in the residue was reduced to less than 1%, while radium was a few %. The composition of the bubbling gas did not effect the leaching behavior. Agitation of NaOH melt promoted the disintegration of the ore and the formation of mixed oxides.

Original language	English
Pages	795-802
Number of pages	8
Publication status	Published - 1999 Dec 1
Event	Global Symposium on Recycling, Waste Treatment and Clean Technology (REWAS 1999) - San Sebastian, Spain Duration: 1999 Sep 5 → 1999 Sep 9

Other

Other	Global Symposium on Recycling, Waste Treatment and Clean Technology (REWAS 1999)
Country	Spain
City	San Sebastian
Period	99/9/5 → 99/9/9

ASJC Scopus subject areas

Filtration and Separation

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title = "Removal of uranium and radium from uranium ores by using sodium containing molten salts",

abstract = "Separation study of uranium and radium as their mixed oxides from the uranium ores was conducted by the reaction with NaCl or NaOH molten salts followed by leaching with dilute HNO3 with the aim of decontamination of the ore tailing. When the ore was heated in the NaCl melt bubbling with nitrogen or oxygen, even though 50% of uranium remained in the residue, the amount of radium in the residue was selectively reduced to 5-8%. In the case of NaOH melt, on the other hand, the amount of uranium in the residue was reduced to less than 1%, while radium was a few %. The composition of the bubbling gas did not effect the leaching behavior. Agitation of NaOH melt promoted the disintegration of the ore and the formation of mixed oxides.",

author = "Nobuaki Sato and Tomihiro Taki and Kohta Yamada and Takeo Fujino",

year = "1999",

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TY - CONF

T1 - Removal of uranium and radium from uranium ores by using sodium containing molten salts

AU - Sato, Nobuaki

AU - Taki, Tomihiro

AU - Yamada, Kohta

AU - Fujino, Takeo

PY - 1999/12/1

Y1 - 1999/12/1

N2 - Separation study of uranium and radium as their mixed oxides from the uranium ores was conducted by the reaction with NaCl or NaOH molten salts followed by leaching with dilute HNO3 with the aim of decontamination of the ore tailing. When the ore was heated in the NaCl melt bubbling with nitrogen or oxygen, even though 50% of uranium remained in the residue, the amount of radium in the residue was selectively reduced to 5-8%. In the case of NaOH melt, on the other hand, the amount of uranium in the residue was reduced to less than 1%, while radium was a few %. The composition of the bubbling gas did not effect the leaching behavior. Agitation of NaOH melt promoted the disintegration of the ore and the formation of mixed oxides.

AB - Separation study of uranium and radium as their mixed oxides from the uranium ores was conducted by the reaction with NaCl or NaOH molten salts followed by leaching with dilute HNO3 with the aim of decontamination of the ore tailing. When the ore was heated in the NaCl melt bubbling with nitrogen or oxygen, even though 50% of uranium remained in the residue, the amount of radium in the residue was selectively reduced to 5-8%. In the case of NaOH melt, on the other hand, the amount of uranium in the residue was reduced to less than 1%, while radium was a few %. The composition of the bubbling gas did not effect the leaching behavior. Agitation of NaOH melt promoted the disintegration of the ore and the formation of mixed oxides.

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M3 - Paper

AN - SCOPUS:0033488729

SP - 795

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T2 - Global Symposium on Recycling, Waste Treatment and Clean Technology (REWAS 1999)

Y2 - 5 September 1999 through 9 September 1999

ER -

Removal of uranium and radium from uranium ores by using sodium containing molten salts

Abstract

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ASJC Scopus subject areas

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