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Mineralogy and uranium leaching of ores from Triassic Peribaltic sandstones.

Gajda D, Kiegiel K, Zakrzewska-Koltuniewicz G, Chajduk E, Bartosiewicz I, Wolkowicz S - J Radioanal Nucl Chem (2014)

Bottom Line: Satisfactory results were obtained for the alkaline leaching process.Almost 100 % of uranium was leached with alkaline carbonate solution.In post leaching solutions only uranium and small amounts of vanadium were present.

View Article: PubMed Central - PubMed

Affiliation: Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warsaw, Poland.

ABSTRACT

The recovery of uranium and other valuable metals from Polish Peribaltic sandstones were examined. The solid-liquid extraction is the first stage of the technology of uranium production and it is crucial for the next stages of processing. In the laboratory experiments uranium was leached with efficiencies 71-100 % by acidic lixiviants. Satisfactory results were obtained for the alkaline leaching process. Almost 100 % of uranium was leached with alkaline carbonate solution. In post leaching solutions only uranium and small amounts of vanadium were present.

No MeSH data available.


Related in: MedlinePlus

Effect of oxidizing agent on uranium leaching efficiency (sample 21/10/169). Process conditions: a particle size: 0–0.2 mm, 60 °C, 1 h, agitation rate: 500 rpm, b particle size: 0–0.2 mm, 60 °C, 1 h, agitation rate: 500 rpm
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Fig11: Effect of oxidizing agent on uranium leaching efficiency (sample 21/10/169). Process conditions: a particle size: 0–0.2 mm, 60 °C, 1 h, agitation rate: 500 rpm, b particle size: 0–0.2 mm, 60 °C, 1 h, agitation rate: 500 rpm

Mentions: The first step in any uranium leaching process is the oxidation of insoluble U4+ to soluble U6+ oxidation state. In the present work various oxidizing agents e.g. MnO2, KMnO4, H2O2, KClO3 were tested. In acid leaching significant difference in effectiveness of oxidizing agent was not observed (Fig. 11a). In alkaline leaching, KMnO4 and H2O2 were found as the most efficient oxidizers (Fig. 11b).Fig. 11


Mineralogy and uranium leaching of ores from Triassic Peribaltic sandstones.

Gajda D, Kiegiel K, Zakrzewska-Koltuniewicz G, Chajduk E, Bartosiewicz I, Wolkowicz S - J Radioanal Nucl Chem (2014)

Effect of oxidizing agent on uranium leaching efficiency (sample 21/10/169). Process conditions: a particle size: 0–0.2 mm, 60 °C, 1 h, agitation rate: 500 rpm, b particle size: 0–0.2 mm, 60 °C, 1 h, agitation rate: 500 rpm
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4514638&req=5

Fig11: Effect of oxidizing agent on uranium leaching efficiency (sample 21/10/169). Process conditions: a particle size: 0–0.2 mm, 60 °C, 1 h, agitation rate: 500 rpm, b particle size: 0–0.2 mm, 60 °C, 1 h, agitation rate: 500 rpm
Mentions: The first step in any uranium leaching process is the oxidation of insoluble U4+ to soluble U6+ oxidation state. In the present work various oxidizing agents e.g. MnO2, KMnO4, H2O2, KClO3 were tested. In acid leaching significant difference in effectiveness of oxidizing agent was not observed (Fig. 11a). In alkaline leaching, KMnO4 and H2O2 were found as the most efficient oxidizers (Fig. 11b).Fig. 11

Bottom Line: Satisfactory results were obtained for the alkaline leaching process.Almost 100 % of uranium was leached with alkaline carbonate solution.In post leaching solutions only uranium and small amounts of vanadium were present.

View Article: PubMed Central - PubMed

Affiliation: Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warsaw, Poland.

ABSTRACT

The recovery of uranium and other valuable metals from Polish Peribaltic sandstones were examined. The solid-liquid extraction is the first stage of the technology of uranium production and it is crucial for the next stages of processing. In the laboratory experiments uranium was leached with efficiencies 71-100 % by acidic lixiviants. Satisfactory results were obtained for the alkaline leaching process. Almost 100 % of uranium was leached with alkaline carbonate solution. In post leaching solutions only uranium and small amounts of vanadium were present.

No MeSH data available.


Related in: MedlinePlus