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Purpose <p>In this study, we experimentally evaluated microbially induced carbonate precipitation (MICP) technology to mitigate wind erosion and dust release from floodplains, explored the response mechanism of consolidated soil particles to MICP, and validated its dust suppression effect on the bonded fine-grained soil surface particles.</p> Methods <p>This study was conducted to investigate the variation in microbial communities when employing MICP technology to control dust release by simulating water level recession.</p> Results <p>The findings revealed that the addition of <i>Sporosarcina pasteurii</i> only (M), the addition of 0.5&#xa0;M urea only (N), and the addition of a mixture of urea and <i>S.pasteurii</i> (MN) treatments all exhibited efficacy in dust suppression, with the most significant dust suppression observed in the MN treatment, followed by M, N, and control (C) treatment. Furthermore, the maximum dust suppression effect was observed when the inundation depth reached 10&#xa0;cm in this study. M, N, and MN treatments all increased the relative abundance of the urease-producing microbial community, primarily represented by the phylum Firmicutes. Network diagrams further illustrated that Nocardioides positively correlated with Massilia, Marmoricola, and Rubellimicrobium within the urease-producing microbial community. Similarly, Sphingomonas exhibited positive correlations with Massilia, while Bacillus showed positive associations with Microvirga, Sphingomonas, and Marmoricola, based on co-occurrence stability, suggesting a stable structure of urease-producing microbial communities.</p> Conclusions <p>In this study, an inundation depth of 10&#xa0;cm was found to be optimal for suppressing dust emission through MICP, resulting in increased topsoil carrying capacity, enhanced urease activity, and minimal soil sample mass loss. The above results indicate that MICP has the potential to enhance the bearing capacity and wind erosion resistance of soils, with significant influences observed in relation to inundation depth.</p>

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Microbially induced calcium carbonate precipitation (MICP) reduces sandbank dust emission during flood recession process

  • 期刊论文

  • 发表日期：

    2025年10月29日

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  • Mingming Cui,
  • Hao Liu,
  • Jing Wang,
  • Biqi Bao,
  • Zhiguang Han,
  • Junqiang Zheng

摘要

Purpose

In this study, we experimentally evaluated microbially induced carbonate precipitation (MICP) technology to mitigate wind erosion and dust release from floodplains, explored the response mechanism of consolidated soil particles to MICP, and validated its dust suppression effect on the bonded fine-grained soil surface particles.

Methods

This study was conducted to investigate the variation in microbial communities when employing MICP technology to control dust release by simulating water level recession.

Results

The findings revealed that the addition of Sporosarcina pasteurii only (M), the addition of 0.5 M urea only (N), and the addition of a mixture of urea and S.pasteurii (MN) treatments all exhibited efficacy in dust suppression, with the most significant dust suppression observed in the MN treatment, followed by M, N, and control (C) treatment. Furthermore, the maximum dust suppression effect was observed when the inundation depth reached 10 cm in this study. M, N, and MN treatments all increased the relative abundance of the urease-producing microbial community, primarily represented by the phylum Firmicutes. Network diagrams further illustrated that Nocardioides positively correlated with Massilia, Marmoricola, and Rubellimicrobium within the urease-producing microbial community. Similarly, Sphingomonas exhibited positive correlations with Massilia, while Bacillus showed positive associations with Microvirga, Sphingomonas, and Marmoricola, based on co-occurrence stability, suggesting a stable structure of urease-producing microbial communities.

Conclusions

In this study, an inundation depth of 10 cm was found to be optimal for suppressing dust emission through MICP, resulting in increased topsoil carrying capacity, enhanced urease activity, and minimal soil sample mass loss. The above results indicate that MICP has the potential to enhance the bearing capacity and wind erosion resistance of soils, with significant influences observed in relation to inundation depth.