Articles | Volume 15, issue 14
Research article
18 Jul 2018
Research article |  | 18 Jul 2018

Improving the strength of sandy soils via ureolytic CaCO3 solidification by Sporosarcina ureae

Justin Michael Whitaker, Sai Vanapalli, and Danielle Fortin

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Cited articles

Achal, V., Mukherjee, A., Basu, P. C., and Reddy, M. S.: Strain improvement of Sporosarcina pasteurii for enhanced urease and calcite production, J. Ind. Microbiol. iot., 36, 981–988,, 2009. 
Achal, V., Abhijit, M., and Reddy, M. S.: Characterization of Two Urease-Producing and Calcifying Bacillus spp. Isolated from Cement, J. Microbiol. Biotech., 20, 1571–1576,, 2010. 
Addadi, L., Raz, S., and Weiner, S.: Taking Advantage of Disorder: Amorphous Calcium Carbonate and Its Roles in Biomineralization, Adv. Mater., 15, 959–970,, 2003. 
Al Qabany, A., Soga, K., and Santamarina, C.: Factors affecting efficiency of microbially induced calcite precipitation, J. Geotech. Geoenviron., 138, 992–1001,, 2012. 
Anthony, J. W., Bideaux, R. A., Bladh, K. W., and Nichols, M. C.: Borates, Carbonates, Sulfates, in: Handbook of Mineralogy, Chantilly, VA: Mineralogical Society of America, 5, available at: (last access: May 2018), 2003. 
Short summary
Materials, like soils or cements, can require repair. This study used a new bacterium (Sporosarcina ureae) in a repair method called "microbially induced carbonate precipitation" (MICP). In three trials, benefits were shown: S. ureae could make a model sandy soil much stronger by MICP, in fact better than a lot of other bacteria. However, MICP-treated samples got weaker in three trials of acid rain. In conclusion, S. ureae in MICP repair shows promise when used in appropriate climates.
Final-revised paper