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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 temperature on leaching efficiency (sample 21/10/166). Process conditions: particle size: 0–0.2 mm, 10 % H2SO4, liquid/solid ratio of 8:1 (vol./wt. basis), oxidizing agent: MnO2, 1 h, agitation rate: 500 rpm
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Fig8: Effect of temperature on leaching efficiency (sample 21/10/166). Process conditions: particle size: 0–0.2 mm, 10 % H2SO4, liquid/solid ratio of 8:1 (vol./wt. basis), oxidizing agent: MnO2, 1 h, agitation rate: 500 rpm

Mentions: Temperature is an important factor playing a significant role in the leaching process. In the present study the efficiency of uranium leaching increased slightly with the range of 40–80 °C (Fig. 8). However, the efficiencies of leaching of other metals increased by 20–40 % along with an increase of temperature. Hence, there was found that the optimal temperature of leaching process of all metals was 60 °C.Fig. 8


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 temperature on leaching efficiency (sample 21/10/166). Process conditions: particle size: 0–0.2 mm, 10 % H2SO4, liquid/solid ratio of 8:1 (vol./wt. basis), oxidizing agent: MnO2, 1 h, agitation rate: 500 rpm
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

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

Fig8: Effect of temperature on leaching efficiency (sample 21/10/166). Process conditions: particle size: 0–0.2 mm, 10 % H2SO4, liquid/solid ratio of 8:1 (vol./wt. basis), oxidizing agent: MnO2, 1 h, agitation rate: 500 rpm
Mentions: Temperature is an important factor playing a significant role in the leaching process. In the present study the efficiency of uranium leaching increased slightly with the range of 40–80 °C (Fig. 8). However, the efficiencies of leaching of other metals increased by 20–40 % along with an increase of temperature. Hence, there was found that the optimal temperature of leaching process of all metals was 60 °C.Fig. 8

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