Authors:
L. K. Selvig Physics Department, Ionizing Radiation Division, 100 Bureau Drive, MS 8462-245 National Institute of Standards and Technology Gaithersburg, MD 20899, USA

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K. G. W. Inn Physics Department, Ionizing Radiation Division, 100 Bureau Drive, MS 8462-245 National Institute of Standards and Technology Gaithersburg, MD 20899, USA

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I. M. J. Outola Physics Department, Ionizing Radiation Division, 100 Bureau Drive, MS 8462-245 National Institute of Standards and Technology Gaithersburg, MD 20899, USA

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H. Kurosaki Physics Department, Ionizing Radiation Division, 100 Bureau Drive, MS 8462-245 National Institute of Standards and Technology Gaithersburg, MD 20899, USA

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K. A. Lee Physics Department, Ionizing Radiation Division, 100 Bureau Drive, MS 8462-245 National Institute of Standards and Technology Gaithersburg, MD 20899, USA

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Summary  

Minerals in the soil range from those that easily weather to those that are very resistant to the weathering processes. The minerals used in this study are referred to as “resistates” because of their resistance to natural weathering processes.1 It is also known that there are some resistate minerals that have a tendency to contain uranium and thorium within their crystal structure. These resistates can contain as much as 15-20% of the total uranium and thorium present in the soil.9 Do resistates dissolve in acids, particularly in the HF/HNO3 procedures, if not what can be done to the HF/HNO3 process to dissolve more of the resistate minerals? How would these acid techniques compare to the fusion method used for mineral dissolution? Could the resistate minerals contain considerable amount of uranium and thorium? These were the questions addressed in this research. The comparative data indicate that the use of H2SO4 in the dissolution process resulted in ~25% overall increase in the minerals dissolving therefore resulting in a higher yield of extracted uranium and thorium.

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation
1968
Volumes
per Year
1
Issues
per Year
12
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)