Abstract
With the extensive development of nuclear energy, soil uranium contamination has become an increasingly prominent problem. The development of evaluation systems for various uranium contamination levels and soil microhabitats is critical. In this study, the effects of uranium contamination on the carbon source metabolic capacity and microbial community structure of soil microbial communities were investigated using Biolog microplate technology and high-throughput sequencing, and the responses of soil biochemical properties to uranium were also analyzed. Then, ten key biological indicators as reliable input variables, including arylsulfatase, biomass nitrogen, metabolic entropy, microbial entropy, Simpson, Shannon, McIntosh, Nocardioides, Lysobacter, and Mycoleptodisus, were screened by random forest (RF), Boruta, and grey relational analysis (GRA). The optimal uranium-contaminated soil microbiological evaluation model was obtained by comparing the performance of three evaluation methods: partial least squares regression (PLS), support vector regression (SVR), and improved particle algorithm (IPSO-SVR). Consequently, partial least squares regression (PLS) has a higher R2 (0.932) and a lower RMSE value (0.214) compared to the other. This research provides a new evaluation method to describe the relationship between soil ecological effects and biological indicators under nuclear contamination.
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This work was supported by the Major Science and Technology Projects in Sichuan Province (2019ZDZX0003) and National Natural Science Foundation of China (12275227).
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Fanzhou Tang, Shiqi Xiao, and Xiaoming Chen have made substantial contributions to the conception or design of the work and analysis or interpretation of data for the work. Fanzhou Tang has drafted the work or revised it critically for important intellectual content. Jiali Huang, Jia hao Xue, Imran Ali, Wenkun Zhu, Hao Chen, and Min Huang performed all the experiments. All persons who have made substantial contributions to the work were reported in the manuscript.
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Tang, F., Xiao, S., Chen, X. et al. Preliminary construction of a microecological evaluation model for uranium-contaminated soil. Environ Sci Pollut Res 31, 28775–28788 (2024). https://doi.org/10.1007/s11356-024-33044-z
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DOI: https://doi.org/10.1007/s11356-024-33044-z