Abstract
Uranium and thorium contents of solar salts were measured by neutron activation analysis. In advance of neutron irradiation, U and Th were concentrated and separated from some interfering elements by neutralization in which they were precipitated with aluminium hydroxide from solutions obtained by dissolving the salts in water or dilute nitric acid solution. The uranium and thorium concentrations determined were from several hundred ppt to 10 ppb. It was strongly indicated that uranium tends to remain in the solution (brine from seawater) phase in the process of solar salt production while thorium tends to transfer to the solid (solar salt) phase.
Similar content being viewed by others
References
Analyses of Salts and Measurements of Their Properties, Soc. Sea Water Sci. Japan, Tokyo, 1992 (in Japanese).
T. IO, K. OGIWARA, Y. YUI, T. OSSAKA, M. MUKAIDA, T. HONDA, Bull. Soc. Sea Water Sci. Japan, 49 (1995) 1 (in Japanese).
Japan Tobacco Inc., An Outlook of Producing Areas of Imported Salts, 1987 (in Japanese).
T. HONDA, T. OI, T. OSSAKA, T. NOZAKI, H. KAKIHANA, J. Radioanal. Nucl. Chem., 130 (1989) 81.
T. HONDA, T. OI, T. OSSAKA, T. NOZAKI, H. KAKIHANA, J. Radioanal. Nucl. Chem., 139 (1990) 65.
T. OI, Y. KIKAWADA, T. HONDA, T. OSSAKA, H. KAKIHANA, J. Radioanal. Nucl. Chem., 140 (1990) 365.
S. SUZUKI, Doctoral Thesis, Tokyo Inst. Technol., 1988 (in Japanese).
Handbook on Nuclear Activation Cross Sections, IAEA Vienna, 1974.
S. MATSUO (Ed.), Chikyu-Kagaku (Geochemistry), Kodansha Scientific, Tokyo, 1989, p. 241 (in Japanese).
N. OGATA, Bull. Soc. Sea Water Sci. Japan, 13 (1971) 121 (in Japanese).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Ogiwara, K., Oi, T., Ossaka, T. et al. Determination of uranium and thorium in solar salts by neutron activation analysis. Journal of Radioanalytical and Nuclear Chemistry, Articles 191, 273–278 (1995). https://doi.org/10.1007/BF02038223
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02038223