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Studies on uranium recovery from a U-bearing Radoniów Dump Cover

Studies on uranium recovery from a U-bearing Radoniów Dump

Nukleonika
Volume 66 (2021): Issue 4 (December 2021)
By: Katarzyna KiegielORCID,  Otton RoubinekORCID,  Dorota GajdaORCID,  Paweł KalbarczykORCID,  Grażyna Zakrzewska-KołtuniewiczORCID and  Andrzej G. ChmielewskiORCID  
Open Access
|Nov 2021

Figures & Tables

Fig. 1

The photo of a material sampling point at the post-mining uranium dump in Radoniów.
The photo of a material sampling point at the post-mining uranium dump in Radoniów.

Fig. 2

(a) The scheme of the reactor: 1 – double-Rushton mixer, 2 – bubbler, 3 – control cabinet, and 4 – engine; (b) the reactor and control system panel built by Kates sp. z o. o.
(a) The scheme of the reactor: 1 – double-Rushton mixer, 2 – bubbler, 3 – control cabinet, and 4 – engine; (b) the reactor and control system panel built by Kates sp. z o. o.

Fig. 3

The efficiency of uranium bioleaching in the reactor (initial uranium concentration in the rock: 750–800 ppm).
The efficiency of uranium bioleaching in the reactor (initial uranium concentration in the rock: 750–800 ppm).

Fig. 4

Fixed-bed reactor. (a) The scheme of the experimental stand: 1 – leaching solution, 2 – U-bearing rocks from Radoniów pile, and 3 – post-leaching solution. (b) The experimental rig photo.
Fixed-bed reactor. (a) The scheme of the experimental stand: 1 – leaching solution, 2 – U-bearing rocks from Radoniów pile, and 3 – post-leaching solution. (b) The experimental rig photo.

Fig. 5

The effect of time on uranium bioleaching in fixed-bed deposit (initial uranium concentration in the rock: 750–800 ppm).
The effect of time on uranium bioleaching in fixed-bed deposit (initial uranium concentration in the rock: 750–800 ppm).

Fig. 6

The scheme of ion exchange process, used for the purification uranium post-bioleaching solution.
The scheme of ion exchange process, used for the purification uranium post-bioleaching solution.

Fig. 7

Two-step precipitation of ammonium diuranate from prior purified post-bioleaching solution.
Two-step precipitation of ammonium diuranate from prior purified post-bioleaching solution.

The composition of K0 bacteria medium used in the bioleaching process

ComponentConcentration (g/dm3)
(NH4)2SO45
KCl0.166
KH2PO40.083
MgSO4 · 7H2O0.830
Ca(NO3)30.024
pH 2

The degree of uranium concentration by IX chromatography in the sample after bioleaching

SampleCycle no.U (ppm)Uranium concentration degree
U-1I272–
U-2X3271.20
U-3XIV3751.38
U-4XVIII4131.52

Chemical analysis of samples taken from the Small Dump in Radoniów

UThCuCoMnZnLa (ppm)VYbMoNiSbFe
7471212212915824473327523 200
80114141836910029523523725 200
DOI: https://doi.org/10.2478/nuka-2021-0017 | Journal eISSN: 1508-5791 | Journal ISSN: 0029-5922
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Language: English
Page range: 115 - 119
Submitted on: Dec 22, 2020
Accepted on: Jan 18, 2021
Published on: Nov 25, 2021
Published by: Institute of Nuclear Chemistry and Technology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
Ammonium diuranate precipitation,
Bioleaching,
Uranium
Related subjects:
Chemistry,
Nuclear chemistry,
Physics,
Astronomy and astrophysics,
Physics, other

© 2021 Katarzyna Kiegiel, Otton Roubinek, Dorota Gajda, Paweł Kalbarczyk, Grażyna Zakrzewska-Kołtuniewicz, Andrzej G. Chmielewski, published by Institute of Nuclear Chemistry and Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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