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| Effects of AMF and chelating agent on strengthening plant intercropping to repair uranium contaminated soil |
| Received:February 14, 2025 Revised:June 14, 2025 |
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| KeyWord:uranium contaminated soil;phytoremediation;intercropping mode;AMF;chelator |
| Author Name | Affiliation | E-mail | | LIU Chaojun | East China University of Technology of Water Resources and Environmental Engineering, Nanchang 330013, China
Jiangxi Provincial Key Laboratory of Genesis and Remediation of Groundwater Pollution, Nanchang 330013, China | | | LU Binyu | East China University of Technology of Water Resources and Environmental Engineering, Nanchang 330013, China
Jiangxi Provincial Key Laboratory of Genesis and Remediation of Groundwater Pollution, Nanchang 330013, China | lubinyu2004@163.com | | CHEN Jingying | East China University of Technology of Water Resources and Environmental Engineering, Nanchang 330013, China
Jiangxi Provincial Key Laboratory of Genesis and Remediation of Groundwater Pollution, Nanchang 330013, China | cjy006@ecut.edu.cn | | ZHANG Ziqing | East China University of Technology of Water Resources and Environmental Engineering, Nanchang 330013, China | | | ZHOU Zhongkui | East China University of Technology of Water Resources and Environmental Engineering, Nanchang 330013, China
Jiangxi Provincial Key Laboratory of Genesis and Remediation of Groundwater Pollution, Nanchang 330013, China | | | ZHANG Wenlong | East China University of Technology of Water Resources and Environmental Engineering, Nanchang 330013, China | | | LIU Wu | East China University of Technology of Water Resources and Environmental Engineering, Nanchang 330013, China | |
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| Abstract: |
| To delve into the remediation effect of the chelator-arbuscular mycorrhizal fungi（AMF）- plant complex system on uraniumcontaminated soil, this study explored the combined impact of citric acid（CA）and Glomus mosseae（Gm）on the rhizosphere environment of uranium-contaminated soil based on a plant intercropping system. The results showed that in the plant intercropping system, the remediation effect of ryegrass intercropping on uranium-contaminated soil was more pronounced, with a 57.70% increase in biomass and a 10.31% reduction in uranium content in the rhizosphere soil. In the experiment combining the treatment of Glomus mosseae and citric acid, compared with the control group, the combined treatment significantly increased the types and concentrations of organic acids in the rhizosphere soil, with increases of 10.52%, 161.38%, and 28.54% in the concentrations of oxalic acid, lactic acid, and acetic acid, respectively. Furthermore, the content of inert uranium in the rhizosphere soil of the combined treatment group decreased by approximately 10 percentage points, indicating that the synergistic effect of citric acid and Glomus mosseae can effectively promote the conversion of inert uranium into potentially active uranium forms such as those bound to organic matter and amorphous iron-manganese oxides. Additionally, the combined remediation led to a decrease in the number of negatively charged groups such as Si—O, C—N, and C—O in the rhizosphere soil, which subsequently reduced the adsorption capacity of the rhizosphere soil for uranyl ions. |
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