|
| Remediation of Uranium Contaminated Soil by Chelating Agent Induced Miscanthus Floridulus |
|
Received:August 10, 2023
Revised:August 13, 2023
Accepted:August 21, 2023
Published Online:October 27, 2023
|
| View Full Text View/Add Comment Download reader |
| DOI：doi：10.3969/j.issn.1007-7545.2023.12.013 |
| KeyWord:uranium; chelating agent; miscanthus floridulus; strengthening; soil remediation |
| Author | Institution |
| LU Binyu |
东华理工大学水资源与环境工程学院 |
| SHU Shoulong |
东华理工大学水资源与环境工程学院 |
| GUO Chenran |
东华理工大学水资源与环境工程学院 |
| CHEN Kai |
东华理工大学水资源与环境工程学院 |
| ZHOU Zhongkui |
东华理工大学水资源与环境工程学院 |
| CHEN Jingying |
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国家重点实验室 |
|
| Hits: 1220 |
| Download times: 1347 |
| Abstract: |
| Taking the uranium-contaminated soil from uranium mines as the research object, the effects of different concentrations of chelating agents (0, 2.5, 5.0, 7.5 mmol/kg) such as ethylene diamine tetraacetic acid (EDTA), citric acid (CA) and ethylenediaminedisuccinic acid (EDDS) on remediation of uranium-contaminated soil by miscanthus floridulus were studied in pot experiment. The results show that the growth, enrichment and absorption of uranium by miscanthus floridulus are related to the concentration and type of chelating agent. EDTA has an obvious toxic effect on the pseudomonas sinensis. With the increase of the concentration of EDTA, the negative effect is greater, and the repair effect is not ideal. However, both CA and EDDS at 2.5 mmol/kg and 5.0 mmol/kg can promote the growth and enrichment of uranium, but the effect of CA is better than that of EDDS. When CA is treated at 5.0 mmol/kg, the above ground and root biomass increase by 27.06% and 12.88% respectively, and the enrichment of uranium increases by 68.05% and 43.21%, respectively, and uranium content in the roots is much higher than that in aboveground part, which indicating that addition of chelating agent promotes the conversion of residual uranium to active uranium in soil solution gradually, and promotes the absorption and enrichment of plants. |
| Close |
|
|
|