Consolidation of Sand Particles by Nanoparticles of Calcite after Concentrating Ureolytic Bacteria In Situ
作者： Salwa Al-Thawadi , Ralf Cord-Ruwisch , Mohamed Bououdina
DOI: 10.1080/19430892.2012.654741
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摘要: ABSTRACT Ureolytic bacteria in the presence of high concentration urea and calcium ions will precipitate calcite crystals form nanocrystal aggregates. Those aggregates consolidate sandy materials by forming bridging points between sand particles. Bacterial cells that were isolated a previous study, Bacillus sp. MCP11 (DSM 23526), successfully concentrated situ up-loading 3-void volumes followed cementation solution (calcium/urea). Sandstone with UCS 1200 kPa was formed three applications without clogging void spaces resulting permeable consolidated core. ESEM images, EDS, XRD analysis for sandstone showed nanoparticles rhombohedral very fine particles at nanoscale point-to-point contact
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