Dissolution of uranium from silicate-apatite ore by Acidithiobacillus ferrooxidans |
| |
| Authors: | S Singh KD Mehta V Kumar BD Pandey VM Pandey |
| |
| Affiliation: | 1. MEF Division, National Metallurgical Laboratory (CSIR), Jamshedpur-831007, Jharkhand, India;2. Uranium Corporation of India, Ltd., Jaduguda Mines P.O., Jharkhand-83102, India;1. Ruprecht-Karls-Universität Heidelberg, Physikalisch-Chemisches Institut, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany;2. Karlsruher Institut für Technologie, Institut für Nukleare Entsorgung, P.O. Box 3640, 76021 Karlsruhe, Germany;1. Mining Engineering Department, Tarbiat Modares University, Tehran 14115116, Iran;2. Nuclear Science and Technology Research Institute, Tehran 113658486, Iran;1. V.A. Kotelnikov Institute of Radioengineering and Electronics, Russian Academy of Sciences, 1 Vvedenskii sq, Fryazino, Moscow reg 141190, Russia;2. A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov st., Moscow 119991, Russia;1. Laboratory for Electrochemical Interfaces, Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA;2. Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA;1. Radiochemistry Laboratory, School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China;2. Key Laboratory of Petroleum Resources, Gansu Province/CAS Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou 730000, China;3. Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou, Gansu 730000, China |
| |
| Abstract: | Bioleaching of a low-grade Indian silicate-apatite uranium ore containing 0.024% U3O8 and 10.6% iron with minor amounts of base metals has been reported. The studies involved extraction of uranium using enriched culture containing Acidithiobacillus ferrooxidans (A. ferrooxidans) derived from the source mine water employing bio-chemically generated ferric ion as an oxidant. Parameters such as particle size of the ore, pulp density, and pH of lixiviant media were optimised. Maximum uranium bio-dissolution of 98% was achieved using ore of mixed particles of < 76 μm size. Uranium bio-recovery was found to be 96% at the pulp density (PD) of 10% (w/v) and 20% (w/v) with the particles of < 76 μm size in 40 days at 2.0 pH and 35 °C temperature. At 1.7 pH and 20% (w/v) PD, 98% uranium bio-recovery was achieved with a rise in redox potential from 595 mV to 715 mV in 40 days. Uranium bio-dissolution may be correlated with the generation of ferric ions through the bio-chemical action on the ore. The work illustrated the efficacy of leaching of uranium by the involvement of bacteria by indirect mechanism. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
