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| Pourbaix Diagram of Uranium in CO2+O2 Leaching System of Sandstone Type Uranium Ore |
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Received:July 28, 2022
Revised:August 04, 2022
Accepted:August 05, 2022
Published Online:November 14, 2022
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| DOI：doi：10.3969/j.issn.1007-7545.2022.12.010 |
| KeyWord:sandstone type uranium deposit; CO2+O2 leaching of uranium; uranium specie; Eh-pH diagram |
| Author | Institution |
| YANG Lan-zhi |
东华理工大学核资源与环境国家重点实验室 |
| ZHOU Yi-peng |
东华理工大学核资源与环境国家重点实验室 |
| XU Ling-ling |
东华理工大学国家重点实验室核资源与环境 |
| LI Guang-rong |
东华理工大学核资源与环境国家重点实验室 |
| SHI Wei-jun |
东华理工大学核资源与环境国家重点实验室 |
| LI Yong |
新疆中核天山铀业有限公司 |
| YANG Xiao-yu |
新疆中核天山铀业有限公司 |
| Muradil·Turgunjan |
新疆中核天山铀业有限公司 |
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| Abstract: |
| The state of uranium is an important condition that determines its migration ability in water. A data set from lab leaching experiments under different CO2 and O2 pressures were synthetically studied in geochemical model software PHREEQC, aiming to decipher influencing factors of Eh-pH field in uranium leaching system. The results show that, in CO2+O2 leaching uranium system, uranyl carbonate complex is the main form of uranium in water, pH value of water affects the critical pH value of dominant domain of uranyl carbonate complex, and HCO3- concentration is the main controlling factor for change of uranium redox critical potential. It indicates that CO2 is the fundamental factor for these changes. |
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