Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Radioactive metal
Patent
1983-01-27
1984-02-14
Hunt, Brooks H.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Radioactive metal
423 6, 423 20, 252631, 252633, 252628, 252629, 210682, C01F 1300, G21F 912
Patent
active
044316097
ABSTRACT:
The invention is a process for the removal of radium from acidic aqueous solutions. In one aspect, the invention is a process for removing radium from an inorganic-acid solution. The process comprises contacting the solution with coal fly ash to effect adsorption of the radium on the ash. The radium-containing ash then is separated from the solution. The process is simple, comparatively inexpensive, and efficient. High radium-distribution coefficients are obtained even at room temperature. Coal fly ash is an inexpensive, acid-resistant, high-surface-area material which is available in large quantities throughout the United States. The invention is applicable, for example, to the recovery of .sup.226 Ra from nitric acid solutions which have been used to leach radium from uranium-mill tailings.
REFERENCES:
patent: 3563890 (1971-02-01), Perl et al.
Morris, J. S. and G. Bobrowski, "The Determination of Radium-226, Lead-214, and Bismuth-214 in Fly Ash Samples from Eighteen (18) Coal Fired Power Plants in the United States", Fifth Int. Ash Util. Symp., 1979, pp. 460-470.
Liskowitz et al., "Leachate-Treatment Technique Utilizing Fly Ash as Low-Cost Sorbent, Quarterly Progress Report", Report DOE/PC/30321-3, Feb. 1982, New Jersey Institute of Technology.
Chemical Abstracts, vol. 67, 1967, p. 6362, #67472g, Ortova et al., "Efficiency of Drinking Water Decontamination from Radioactive Substances with Certain Natural Sorbents."
Chemical Abstracts, vol. 70, 1969, p. 241, #80711r, Otto et al., "Use of Kieselguhr, Multicyclone Powders, and Several Other Adsorbents for Decontamination of Waste Containing Cesium-137 and Strontium-90/Yttrium-90."
Chemical Abstracts, vol. 78, 1973, p. 221, #151263z, Otto et al., "Usability of Some Adsorbents for the Decontamination of Radioactive Waste."
Besha Richard G.
Hamel Stephen D.
Hunt Brooks H.
Lewis Fred O.
The United States of America as represented by the United States
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