ArticleCurrent microbiology2025
Microbially Induced Sand Cementation Using Lysinibacillus Fusiformis NM01.
Article in Current microbiology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Microbially induced calcium carbonate precipitation (MICP) holds promise for sandy soil stabilization, but requires environmentally adaptable urease-producing bacteria. This study isolated a urease-producing strain, NM01 (Lysinibacillus fusiformis), from a local carbonate mining area. NM01 demonstrated robust growth and high urease activity (~ 30 mM/min) across a broad temperature (25-35 °C) and pH (6-10) range. Sand column cementation tests confirmed NM01's efficacy, transforming loose sand into cohesive structures. The unconfined compressive strength (UCS) significantly increased from 0 to 630 ± 50 kPa, while calcium carbonate content rose from 3.81% to 8.99%. Comprehensive characterization using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD) verified successful calcium carbonate precipitation and biologically mediated sand solidification. XRD and SEM analyses identified the precipitated calcium carbonate primarily as calcite and vaterite. The successful isolation of this locally adapted, high-performance ureolytic bacterium provides a valuable microbial resource for advancing MICP technology applications.
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