Microbially induced calcium carbonate precipitation on surface or in the bulk of soil

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dc.contributor.authorChu, Jian
dc.contributor.authorStabnikov, Victor
dc.contributor.authorIvanov, Volodymyr M.
dc.date.accessioned2013-02-18T15:49:38Z
dc.date.available2013-02-18T15:49:38Z
dc.date.issued2012
dc.description.abstractMicrobial precipitation of calcium carbonate takes place in nature by different mechanisms. One of them is microbially induced carbonate precipitation (MICP), which is performed due to bacterial hydrolysis of urea in soil in the presence of calcium ions. The MICP process can be adopted to reduce the permeability and/or increase the shear strength of soil. In this paper, a study on the use of Bacillus sp., which was isolated from tropical beach sand, to perform MICP either on the surface or in the bulk of sand is presented. If the level of calcium salt solution was below the sand surface, MICP took place in the bulk of sand. On the other hand, if the level of calcium salt solution was above the sand surface, MICP was performed on the sand surface and formed a thin layer of crust of calcium carbonate. After six sequential batch treatments with suspension of urease-producing bacteria and solutions of urea and calcium salt, the permeability of sand was reduced to 14 mm/day (or 1.6×10−7 m/s) in both cases of bulk and surface MICP. Quantitiesof precipitated calcium after six treatments were 0.15 and 0.60 g of Ca per cm2 of treated sand surface for the cases of bulk or surface MICP, respectively. The stiffness of the MICP treated sand also increased considerably. The modulus of rupture of the thin layer of crust was 35.9 MPa which is comparable with limestone.uk_UK
dc.identifier.citationChu, J. Microbially Induced Calcium Carbonate Precipitation on Surface or in the Bulk of Soil / J. Chu, V. Stabnikov, V. Ivanov // Geomicrobiology Journal. – 2012. – Vol. 29, – P. 544–549.uk_UK
dc.identifier.urihttps://dspace.nuft.edu.ua/handle/123456789/6395
dc.language.isoenuk_UK
dc.subjectmicrobially induced calcium carbonate precipitationuk_UK
dc.subjectsoil bioclogginguk_UK
dc.subjectsoil biocementationuk_UK
dc.subjectмікробне осадження карбонату кальціюuk_UK
dc.subjectбіозакупорювання пір ґрунтуuk_UK
dc.subjectбіоцементація ґрунтуuk_UK
dc.subjectмикробное осаждение карбоната кальцияuk_UK
dc.subjectбиозакупорка пор почвыuk_UK
dc.subjectбиоцементация почвыuk_UK
dc.subjectкафедра біотехнології і мікробіології
dc.titleMicrobially induced calcium carbonate precipitation on surface or in the bulk of soiluk_UK
dc.typeArticleuk_UK

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