Column Bioleaching of Fluorine-Bearing Uranium Ore

DOI

10.2991/ifeesd-16.2016.177How to use a DOI?

Keywords

Uranium bioleaching; fluorine toxicity; MLA; pitchblende; column leaching

Abstract

The results of MLA automated quantitative mineralogy system indicated the uranium ore used in this study was mainly composed by pitchblende (0.467%), quartz (64.911%), fluorite (2.177%) and pyrite (0.436%). High content fluorite and low content pyrite mineral were unfavorable for extracting of uranium by bioleaching; furthermore, the relatively higher U4+ in this uranium ore resulted it is difficult to dissolve with sulfuric acid. The fluoride-tolerance mixed microbes (Acidithiobacillus ferrivoran, Acidithiobacillus ferrooxidans, and Leptospirillum ferriphilum) were used for bioleaching of uranium, and the bacterial leaching and acid leaching experiments of fluoride-containing uranium ore were investigated in column during 38 days. The experiment with mixed culture and added ferrous reached the highest uranium recovery rate (72.04%), which exceeded the recovery rate of traditional acid leaching technique 12%. High uranium recovery was founded to be due to the addition ferrous iron that can be readily achieved by fluoride-tolerance bacterial leaching. The results of this paper will lay the foundation for high fluoride uranium biological heap leaching tests.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Xiaolan Mo
AU  - Xiang Li
AU  - Jiankang Wen
AU  - Liulu Cai
PY  - 2016/05
DA  - 2016/05
TI  - Column Bioleaching of Fluorine-Bearing Uranium Ore
BT  - Proceedings of the 2016 International Forum on Energy, Environment and Sustainable Development
PB  - Atlantis Press
SP  - 992
EP  - 995
SN  - 2352-5401
UR  - https://doi.org/10.2991/ifeesd-16.2016.177
DO  - 10.2991/ifeesd-16.2016.177
ID  - Mo2016/05
ER  -