ArticleScientific reports2025
Strengthening mechanisms of indigenous bacteria in granite residual soil improvement via microbial induced calcite precipitation.
Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed.
- A genomic framework for tracking antibiotic resistance genes: global dissemination ofAntimicrobial agents and chemotherapy · 2026Article
- Extracellular polymeric substances as local nucleation microenvironments in ureolytic MICP for concrete crack sealing: a mini review.Frontiers in microbiology · 2026Review
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7 authors.
Funding
Abstract
Microbially induced carbonate precipitation (MICP) has proven to be an effective method for soil reinforcement. Sporosarcina pasteurii is widely used due to its high urease activity. However, being an alkaliphilic bacterium, its limitations in acidic soil environments tend to be overlooked. This study isolated a native urease-producing bacterial strain Bacillus aryabhattai with acid tolerance, and comparative analysis of the growth characteristics of B. aryabhattai and S. pasteurii. The grouting and spraying techniques were employed to reinforce granite residual soil by the B. aryabhattai and the S. pasteurii, and the reinforcement mechanisms were systematically investigated. Experimental results indicated that despite exhibiting slightly lower urease activity and growth, the indigenous urease-producing bacterium B. aryabhattai demonstrated superior environmental resilience in terms of both environmental temperature and pH range. The soil samples reinforced by grouting with B. aryabhattai and S. pasteurii exhibited increases in ultrasonic wave velocity, unconfined compressive strength, cohesion, and cumulative disintegration rate to varying degrees compared to the untreated soil samples. Meanwhile, the resistance value of the soil samples reinforced by spraying with B. aryabhattai and S. pasteurii decreased by 84.39% and 79.79%, respectively. Additionally, the calcium carbonate content in the upper section of soil reinforced with B. aryabhattai was comparable to that of S. pasteurii; however, while in the lower section, it exhibited a 36.22% higher precipitation rate than the S. pasteurii-treated soil. Overall, the indigenous strain B. aryabhattai demonstrated remarkable reinforcement effectiveness, attributed to its rapid adaptation to weakly acidic soil conditions and moderate urease activity, which promoted a homogeneous distribution of calcium carbonate. These findings provide significant insights for soil reinforcement applications through MICP.
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