Micro-Scale Analysis of Microbial-Induced Calcite Precipitation in Sandy Soil through SEM/FIB Imaging
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چکیده
منابع مشابه
FIB/SEM Imaging of Microbial Induced Calcite Precipitation in Sandy Soil
As one of the emerging soil improvement techniques, microbial induced calcite precipitation (MICP) can bond soil grains together and improve the engineering properties of soil [1]. bacteria produces urease enzyme can catalyze urea to carbonate and result in calcite precipitation in elevated pH environment. The forms of calcite precipitation around the bacteria limit the availability of oxygen a...
متن کاملAn Overview of the Factors Affecting Microbial-Induced Calcite Precipitation and its Potential Application in Soil Improvement
Microbial-induced calcite precipitation (MICP) is a relatively green and sustainable soil improvement technique. It utilizes biochemical process that exists naturally in soil to improve engineering properties of soils. The calcite precipitation process is uplifted by the mean of injecting higher concentration of urease positive bacteria and reagents into the soil. The main objective of this pap...
متن کاملUrease activity in microbiologically-induced calcite precipitation.
The role of microbial urease in calcite precipitation was studied utilizing a recombinant Escherichia coli HB101 containing a plasmid, pBU11, that encodes Bacillus pasteurii urease. The calcite precipitation by E. coli HB101 (pBU11) was significant although its precipitation level was not as high as that by B. pasteurii. Addition of low concentrations (5-100 microM) of nickel, the cofactor of u...
متن کاملMicrobially Induced Calcite Precipitation Employing Environmental Isolates
In this study, five microbes were employed to precipitate calcite in cohesionless soils. Four microbes were selected from calcite-precipitating microbes isolated from calcareous sand and limestone cave soils, with Sporosarcina pasteurii ATCC 11859 (standard strain) used as a control. Urease activities of the four microbes were higher than that of S. pasteurii. The microbes and urea-CaCl₂ medium...
متن کاملCementation of Sand Soil by Microbially Induced Calcite Precipitation at Various Degrees of Saturation
4 A newly emerging microbiological soil stabilization method, known as microbially 5 induced calcite precipitation (MICP), is tested for geotechnical engineering 6 applications. MICP is a promising technique that utilizes the metabolic pathways of 7 bacteria to form calcite precipitation throughout the soil matrix, leading to an increase 8 in soil strength and stiffness. This paper investigates...
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ژورنال
عنوان ژورنال: Microscopy Today
سال: 2019
ISSN: 1551-9295,2150-3583
DOI: 10.1017/s1551929518001293