Impact of bacteria and urease concentration on precipitation kinetics and crystal morphology of calcium carbonate

Wen, Kejun; Yang, Li; Amini, Farshad; Li, Lin

doi:10.1007/s11440-019-00899-3

Cited by 97 publications

(41 citation statements)

References 32 publications

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“…The rate of soluble calcium depletion was observed to increase on increasing the NUMC concentration in the cementation medium. Increasing the NUMC concentration increases the total urease activity of the system, which in turn increases the soluble calcium depletion rate 22 . Moreover, the results show a positive correlation between CaCO3 precipitation rate and the cell concentration [22][23][24] .…”

Section: Discussionmentioning

confidence: 99%

“…Although researchers have demonstrated biogeochemical changes during the biostimulation approach, not much has been investigated on the impact of native ureolytic microbial communities (NUMC) on the performance of S. pasteurii and how these communities perform in comparison to this high urease producing culture 37 . Also, the concentration of NUMC changes vastly in the field and may affect the kinetics of the CaCO3 process, its mineralogy, and morphology which are the determining factors for the success of biocementation 22 .…”

mentioning

confidence: 99%

“…Amongst all these factors, the concentration of bacteria and urease enzyme is a crucial factor 22 and is reflected in the kinetic constant of the CaCO3 precipitation in terms of first-order rate constant of 0.002 to 0.60 h -1 [23][24][25] . Further, the kinetics of the process also control the morphological and nanomechanical properties of the precipitated CaCO3; the slow rate of precipitation leads to the production of larger-sized crystals that are relatively stable compared to the smaller crystals formed at a high rate of precipitation 26,27 .…”

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confidence: 99%

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Influence of Native Ureolytic Microbial Community on Biocementation Potential of Sporosarcina Pasteurii

Raja

Suraishkumar

Muhkerjee

et al. 2021

Preprint

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Microbially induced calcium carbonate precipitation (MICP)/Biocementation has emerged as a promising technique for soil engineering applications. There are chiefly two methods by which MICP is applied for field applications including biostimulation and bioaugmentation. Although bioaugmentation strategy using efficient ureolytic biocementing culture of Sporosarcina pasteurii is widely practiced, the impact of native ureolytic microbial communities (NUMC) on CaCO3 mineralisation via S. pasteurii has not been explored. In this paper, we investigated the effect of different concentrations of NUMC on MICP kinetics and biomineral properties in the presence and absence of S. pasteurii. Kinetic analysis showed that the biocementation potential of S. pasteurii is 6-fold higher than the NUMC and is not significantly impacted even when the concentration of the NUMC is eight times higher. Micrographic results revealed a quick rate of CaCO3 precipitation by S. pasteurii led to the generation of smaller CaCO3 crystals (5–40 µm), while the slow rate of CaCO3 precipitation by NUMC led to the creation of larger CaCO3 crystals (35–100 µm). Mineralogical results showed the predominance of the calcite phase in both sets. The outcome of the current study is crucial for tailor-made applications of MICP.

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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Influence of Native Ureolytic Microbial Community on Biocementation Potential of Sporosarcina Pasteurii

Raja

Suraishkumar

Muhkerjee

et al. 2021

Preprint

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“…One of the important parameters that affects the formation of calcium carbonate crystals during the bio-cementation of soils is the concentration of cementation reagent [6,17].…”

Section: Effect Of Ccr On the Unconfined Compressive Strength Of The Treated Soilmentioning

confidence: 99%

“…Nevertheless, these techniques have some setbacks due to their potential adverse environmental effects [3]. Over the last decade, substantial research has been carried out on the use of biomediated and bio-inspired soil improvement techniques to improve the geotechnical properties of mostly granular soils [4][5][6]. These biogeotechnical techniques are promising, environmentally friendly and sustainable soil improvement techniques [7,8].…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Strength of Sandy Soil Through Enzyme-Induced Calcite Precipitation

Muhammed

Kassim

Zango

et al. 2021

Int. J. of Geosynth. and Ground Eng.

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Enzyme-induced calcite precipitation (EICP) is a biocementation technique that has the potential to improve the engineering properties of sand. The effectiveness of the EICP treatment was evaluated based on the unconfined compressive strength (UCS) tests at various concentrations of cementation reagent (CCR) and curing periods. The treated sand was analysed for its calcium carbonate content and microstructural analysis using FESEM-EDX. The results showed an increase in unconfined compressive strength and calcium carbonate content at a higher concentration of cementation reagent. The UCS value and CaCO 3 content of the treated samples are 161-552 kPa and 0.92-5.73%, respectively. There is a linear relationship between the UCS at various cementation reagent concentrations and the average calcium carbonate content.

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Unconfined Compressive Strength of Compacted Tropical Soil Bio-treated with Bacillus Megaterium

Eberemu

2021

Finding Solutions of the 21st Century Transportation Problems Through Research and Innovations

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Impact of bacteria and urease concentration on precipitation kinetics and crystal morphology of calcium carbonate

Cited by 97 publications

References 32 publications

Influence of Native Ureolytic Microbial Community on Biocementation Potential of Sporosarcina Pasteurii

Influence of Native Ureolytic Microbial Community on Biocementation Potential of Sporosarcina Pasteurii

Enhancing the Strength of Sandy Soil Through Enzyme-Induced Calcite Precipitation

Unconfined Compressive Strength of Compacted Tropical Soil Bio-treated with Bacillus Megaterium

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