Digitale Medien
Springer
Water, air & soil pollution
26 (1985), S. 95-104
ISSN:
1573-2932
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Energietechnik
Notizen:
Abstract Tailings originating from the U ore processing operation are returned to the mine as back-fill and the rest are dumped in a manmade or naturally available impoundment facility. This impoundment facility-tailings pond — becomes the repository of a significant amount of Ra which may be dissolved and transported under some favorable conditions. Investigations were carried out to study possible dissolution of Ra from the tailings pond of the acid-leach processing plant operating in India. The size fraction analysis of the tailings deposited indicated that 80% of the particles had sizes below 74 gm. The specific activity of Ra in tailings increases as the particle size decreases. Only 0.5% of Ra from tailings were solubilized by leaching with rain water. Chloride ions enhanced the leachability of Ra by more than 13%. Ammonium acetate, ammonium nitrate and EDTA were found to remove 20%, 30% and 65% of the Ra, respectively. The containment of tailings is essential in view of its potential for release of Ra into the environment.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00299492
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