CO2和O2地浸浸出液中铀浓度的快速测定方法

Abstract

Abstract: To establish a safe and rapid uranium concentration analysis method for CO₂ and O₂ in-situ leaching uranium technology. Research has shown that in an anhydrous ethanol water medium, UO₂²⁺forms a red complex with 5-Br-PADAP and F^- under the mixed chelating agent CyDTA sulfosalicylic acid sodium fluoride. The optimal wavelength for measuring absorbance is 580 nm, and the suitable pH range for color development is 6.68-9.24. The amount of anhydrous ethanol used is 7.5 mL. The analysis results showed that the RSD was less than 1.0%. This method has shown good application in measuring uranium concentration in CO₂ and O₂ leaching solutions of uranium mining and metallurgy. The use of anhydrous ethanol instead of acetone has improved the efficiency and operational safety of uranium concentration analysis methods.

Key words: in-situ leaching, uranium concentration, 5-Br-PADAP, spectrophotometry

CLC Number:

O657.3

DONG Shuang, LIU Jinming, SONG Jing, SUN Liping. Rapid determination of uranium concentration in in-situ leaching uranium stock solution with CO₂ and O₂[J].RADIATION PROTECTION, 2025, 45(4): 343-348.

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Rapid determination of uranium concentration in in-situ leaching uranium stock solution with CO₂ and O₂

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Rapid determination of uranium concentration in in-situ leaching uranium stock solution with CO₂ and O₂