|
| Characteristics of Desulfurization and Uranium Immobilization by a Sulfate-reducing Bacteria Strain and Stability of the Immobilized Product |
|
Received:March 22, 2024
Revised:March 22, 2024
Accepted:April 03, 2024
Published Online:May 01, 2024
|
| View Full Text View/Add Comment Download reader |
| DOI：doi：10.3969/j.issn.1007-7545.2024.06.021 |
| KeyWord:sulfate-reducing bacteria; desulfurization; uranium-fixing; stability of solid uranium products; uranium-bearing groundwater |
| Author | Institution |
| CHEN Xin |
东华理工大学核资源与环境国家重点实验室 |
| LIU Yajie |
东华理工大学核资源与环境国家重点实验室 |
| CHEN Hongliang |
东华理工大学核资源与环境国家重点实验室 |
| ZHAO Bei |
中国地质大学北京水资源与环境学院;中国地质大学北京水资源与环境学院 |
| LIU Miao |
北京市昌平区河湖生态环境服务中心 |
| SUN Zhanxue |
东华理工大学核资源与环境国家重点实验室 |
| CHEN Jianguang |
新疆中核天山铀业有限公司 |
| XU Yiqun |
新疆中核天山铀业有限公司 |
|
| Hits: 1063 |
| Download times: 1151 |
| Abstract: |
| A sulfate-reducing bacterial strain, A1SXC21Q, was enriched and isolated from the soil in a uranium mine, and the desulfurization and uranium-fixing properties of the strain and the stability of its uranium-fixing products were investigated under different pH value, temperature, and SO42- condition. The results show that elevated pH favores the removal of SO42- and uranium by the bacterial strain, and the removal of both SO42- and uranium can reach higher than 95% under the initial pH value of 5.5—7.0. Increasing initial SO42- concentration decreases the removal rate of SO42- and uranium, however, the removal rate of SO42- and uranium can still reach 75.42% and 50.57% when the initial SO42- concentration is 2 000 mg/L. The removal of SO42- and uranium can be accelerated significantly by increasing temperature, and the removal rate of both SO42- and uranium reaches about 95% at 25—35 ℃. A1SXC21Q can transfer uranium enriched on its surface to the interior of the cell and form multiple "nucleated" uranyl phosphate complexes, resulting in a stabilized uranium-fixing product. From the perspective of the desulfurization and uranium fixation effect of A1SXC21Q and the stability of its solid uranium fixation products, it is expected that A1SXC21Q can be used in the subsequent experimental research of groundwater bioremediation technology in the retired mining area of acid leaching uranium mines in the future. |
| Close |
|
|
|