Izvestiya of Saratov University.

Chemistry. Biology. Ecology

ISSN 1816-9775 (Print)
ISSN 2541-8971 (Online)
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Language: 
Russian
Heading: 
Chemistry
Article type: 
Article
UDC: 
546.659:546.65:504.064:539.16
DOI: 
10.18500/1816-9775-2020-20-3-284-289

Pre-Concentration and Extraction of Samarium Isotopes by Precipitation of Slightly Soluble Hydroxides and Fluorides of Metals

Autors: 
Salmenbayev Sayan E., Institute for Radiation Safety and Ecology of the National Nuclear Center
Nurgaysinova Nazgul K., Institute for Radiation Safety and Ecology of the National Nuclear Center
Umarov Murat A., Institute for Radiation Safety and Ecology of the National Nuclear Center
Abstract: 

The comparison and assessment of the efficiency of using the precipitation of sparingly soluble metal hydroxides and fluorides for the extraction and pre-concentration of samarium isotopes from the solution simulating acidic leachate of the soil were made. It was shown that the precipitation of samarium isotopes was achieved quantitatively at the pH of about 7 and the co-precipitation of alkaline and alkaline earth elements did not exceed 20%. In contrast to that the fluoride precipitation was characterized by practically quantitative precipitation of alkaline, alkaline earth elements and Al, while the maximum extraction of samarium isotopes did not exceed 90%. The authors assumed that sequential precipitation procedures would be more effective for removing the bulk of the matrix without significant losses of samarium.

Key words: 
pre-concentration
extraction
precipitation
coprecipitation
hydroxides and fluorides of metals
STS
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Received: 
31.08.2020