Abstract
Soil-formation process is critical to ecological rehabilitation on bauxite residue disposal areas. In this study, a soil column experiment was taken to assess the dynamic variations of soil-formation indicators in bauxite residue driven by the integration of waste solids and microorganisms. Results showed that the combination of waste solids and microorganisms significantly decreased the alkalinity, accumulated organic carbon content, and improved aggregate stability of bauxite residue. Compared with waste solids treatments, the addition of acid-producing microorganisms enhanced the changes of soil-formation indicators. The integration of waste solids and microorganisms increased the content of aliphatic carbon, presenting low thermal stability in the residues. The integration of waste solids and microorganisms provides a potentially effective method for soil formation and ecological remediation on bauxite residue disposal areas.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (42077379), the Open Sharing Fund for the Large-scale Instruments, Equipment of Central South University (No. CSUZC202127), and the Fundamental Research Funds for the Central Universities of Central South University (No.2021zzts0117).
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Guo, Y., Qin, X., Guo, X. et al. Dynamic Variations of Soil-Formation Indicators in Bauxite Residue Driven by the Integration of Waste Solids and Microorganisms. Bull Environ Contam Toxicol 109, 202–208 (2022). https://doi.org/10.1007/s00128-022-03505-7
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DOI: https://doi.org/10.1007/s00128-022-03505-7