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| Discussion on Reactive Transport Modeling of In Situ Uranium Acid Leaching with PHT3D |
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Received:June 27, 2019
Revised:July 01, 2019
Accepted:July 03, 2019
Published Online:October 23, 2019
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| DOI：doi：10.3969/j.issn.1007-7545.2019.11.007 |
| KeyWord:in situ uranium leaching; uranium acid leaching; reaction migration simulation; water-rock reaction |
| Author | Institution |
| CHEN Qian-qian |
东华理工大学水资源与环境工程学院;东华理工大学核资源与环境重点实验室 |
| LUO Yue |
东华理工大学水资源与环境工程学院;东华理工大学核资源与环境重点实验室 |
| LI Xun |
东华理工大学水资源与环境工程学院 |
| CHEN Jing-ming |
东华理工大学水资源与环境工程学院 |
| ZHOU Ze-chao |
东华理工大学水资源与环境工程学院 |
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| Abstract: |
| One-dimensional model of in situ uranium acid leaching was established with reaction transport simulation software PHT3D to clarify temporal and spatial evolution of uranium hydrolysis and migration during in situ uranium leaching under strong acid and low oxygen concentration condition. The simulation results show that uranium dissolution produces the most tetravalence uranium followed by hexavalent uranium as the second; the values of pe (electric potential) and pH of aqueous solution are related to change of concentration of main liquidus components. Curves of pe and pH are related, and the intersection point is the starting point of significant change of main liquidus components concentration. Uranium deposit will not only dissolve but also accompany phenomenon of micro-generation of uranium, and amount of dissolved precipitate is related to position. |
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