Decontamination of Zr by Acetohydroxamic Acid in Uranium Purification Cycle
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Graphical Abstract
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Abstract
The effect of the concentrations of acetohydroxamic acid(AHA), HNO3 and HDBP on the distribution coefficient of Zr(Ⅳ) is studied by single-stage experiments. The result of the experiments simulating the scrubbing section of 2D extractor of the uranium purification cycle shows: D(Zr(Ⅳ)) decreases with the increase of AHA concentration or the decrease of HNO3 concentration. In uranium system,HDBP does not effect DF(Zr(Ⅳ)) when c(HDBP)≤ 0.1 mol/L. The results of the two times of counter current cascade experiments simulating the scrubbing section of 2D extractor show that DF(Zr(Ⅳ)) is 3.2×104, 4.3×104, respectively. Material balance of Zr(Ⅳ) is 100%, 98%, respectively. All the results indicate that the decontamination of Zr(Ⅳ) could be improved using AHA under the precondition of ensuring uranium recovering rate in the uranium purification cycle.
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