<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>This work reports the possibility of uranium recovery from a post-mining uranium ore dump in Poland by a bioleaching method. The studies were conducted on the dump leaching model with the mass of 570 kg of uranium bearing mineral material from Radoniów pile and in the periodic bioreactor with a work volume of 80 dm<sup>3</sup> and with mechanical mixing and aeration of the charge. The uranium concentration in the examined material was about 800 ppm. In this process, the consortium of microorganisms isolated from former mines was used. It was composed of the following microorganisms: <italic>Bacillius</italic>, <italic>Pseudomonas</italic>, <italic>Sphingomonas</italic>, <italic>Thiobacillus</italic>, <italic>Halothiobacillus</italic>, <italic>Thiomonas</italic>, and <italic>Geothrix.</italic> The efficiency of the uranium bioleaching process was 98% in the reactor, and a yield of 70% was obtained in the dump leaching model. The post-leaching solution contained significant amounts of uranium ions that were separated in two stages: (1) by ion chromatography and then (2) by a two-step precipitation method. The resulting solution was a source of ammonium diuranate, the precursor of yellowcake (uranium oxides).</p>
</abstract>

This work reports the possibility of uranium recovery from a post-mining uranium ore dump in Poland by a bioleaching method. The studies were conducted on the dump leaching model with the mass of 570 kg of uranium bearing mineral material from Radoniów pile and in the periodic bioreactor with a work volume of 80 dm3 and with mechanical mixing and aeration of the charge. The uranium concentration in the examined material was about 800 ppm. In this process, the consortium of microorganisms isolated from former mines was used. It was composed of the following microorganisms: Bacillius, Pseudomonas, Sphingomonas, Thiobacillus, Halothiobacillus, Thiomonas, and Geothrix. The efficiency of the uranium bioleaching process was 98% in the reactor, and a yield of 70% was obtained in the dump leaching model. The post-leaching solution contained significant amounts of uranium ions that were separated in two stages: (1) by ion chromatography and then (2) by a two-step precipitation method. The resulting solution was a source of ammonium diuranate, the precursor of yellowcake (uranium oxides).

Studies on uranium recovery from a U-bearing Radoniów Dump

Nukleonika

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

{"article-title":"Studies on uranium recovery from a U-bearing Radoniów Dump"}

This work reports the possibility of uranium recovery from a post-mining uranium ore dump in Poland by a bioleaching method. The studies were conducted on the...

Component	Concentration (g/dm³)
(NH₄)₂SO₄	5
KCl	0.166
KH₂PO₄	0.083
MgSO₄ · 7H₂O	0.830
Ca(NO₃)₃	0.024
pH 2

Sample	Cycle no.	U (ppm)	Uranium concentration degree
U-1	I	272	–
U-2	X	327	1.20
U-3	XIV	375	1.38
U-4	XVIII	413	1.52

U	Th	Cu	Co	Mn	Zn	La (ppm)	V	Yb	Mo	Ni	Sb	Fe
747	12	12	21	291	58	24	47	3	3	27	5	23 200
801	14	14	18	369	100	29	52	3	5	23	7	25 200

Studies on uranium recovery from a U-bearing Radoniów Dump

Article Category: Original Paper

Publié en ligne: 25 nov. 2021

Pages: 115 - 119

Reçu: 22 déc. 2020

Accepté: 18 janv. 2021

DOI: https://doi.org/10.2478/nuka-2021-0017

Mots clés
Ammonium diuranate precipitation, Bioleaching, Uranium

© 2021 Katarzyna Kiegiel et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Fig. 1

Fig. 2

Fig. 3

Fig. 4

Fig. 5

Fig. 6

Fig. 7

The composition of K0 bacteria medium used in the bioleaching process

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

Chemical analysis of samples taken from the Small Dump in Radoniów

Studies on uranium recovery from a U-bearing Radoniów Dump

Article Category: Original Paper

Publié en ligne: 25 nov. 2021

Pages: 115 - 119

Reçu: 22 déc. 2020

Accepté: 18 janv. 2021

DOI: https://doi.org/10.2478/nuka-2021-0017

Mots clésAmmonium diuranate precipitation, Bioleaching, Uranium

© 2021 Katarzyna Kiegiel et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Fig. 1

Fig. 2

Fig. 3

Fig. 4

Fig. 5

Fig. 6

Fig. 7

The composition of K0 bacteria medium used in the bioleaching process

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

Chemical analysis of samples taken from the Small Dump in Radoniów

Mots clés
Ammonium diuranate precipitation, Bioleaching, Uranium