Estimation on ureolysis-based microbially induced calcium carbonate precipitation progress for geotechnical applications

Tirkolaei, Hamed Khodadadi; Bilsel, Huriye

doi:10.1080/1064119x.2015.1099062

Cited by 17 publications

(4 citation statements)

References 16 publications

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“…The composition of cementation reagent reported by researchers (e.g., Stocks-Fischer et al, 1999;Dejong et al, 2006;Tirkolaei and Bilsel, 2017;Mujah et al,2019 andOsinubi et al, 2020a) was used in the study. The reagent was composed of 20 g Urea, 10 g NH4Cl, 3 g Nutrient broth, 2.8 g CaCl2 and 2.12 g NaHCO3 per litre of de-ionized water.…”

Section: Cementation Reagentmentioning

confidence: 99%

Compatibility of Landfill Leachate with Compacted Biocemented Lateritic Soil Through Microbial Induced Calcite Precipitation Technique

Kolawole

Emmanuel

Eberemu

et al. 2021

JGS Special Publication

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A new soil improvement method known as microbial induced calcite precipitation (MICP) has received tremendous attention of researchers in the related fields. This paper reports the results of the compatibility of compacted bio-cemented lateritic soil with municipal solid waste (MSW) leachate. Lateritic soil was treated with Sporosarcina pasteurii (S. pasteurii) suspension densities up to 2.40 x 10 9 cells/ml and compacted using British Standard light, BSL (or standard Proctor) energy. The permeation with leachate only yielded minimum hydraulic conductivity values of 5.02 x 10 -10 m/s for the natural soil and 5.78 x 10 -10 m/s for specimen treated with S. pasteurii suspension density of 2.40 x 10 9 cells/ml. The micrographs of specimens treated with S. pasteurii suspension density of 2.40 x 10 9 cells/ml and permeated with leachate only depicted the development of bio-film when compared with micrograph of the untreated soil. Test results showed significant reduction in the concentration of the MSW leachate chemical specie considered after interaction with S. pasteurii for 150 days either through bio-transformation or bio-degradation process.

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Section: Cementation Reagentmentioning

confidence: 99%

Compatibility of Landfill Leachate with Compacted Biocemented Lateritic Soil Through Microbial Induced Calcite Precipitation Technique

Kolawole

Emmanuel

Eberemu

et al. 2021

JGS Special Publication

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“…The cementation reagent is composed of 20 g urea, 10 g NH 4 Cl, 3 g nutrient broth, 2.8 g CaCl 2 and 2.12 g NaHCO 3 per liter of de-ionized water reported in several studies (e.g., [4,12,23,38,63,69,71,72]. In all the studies cited, 3 g/l of nutrient broth was added to the cementation reagent because it was the most viable amount for survival of bacteria [66].…”

Section: Cementation Reagentmentioning

confidence: 99%

Plasticity characteristics of lateritic soil treated with Sporosarcina pasteurii in microbial-induced calcite precipitation application

et al. 2019

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The plasticity characteristics of lateritic soil with varying Sporosarcina pasteurii (S. pasteurii) suspension density and compositional variables were evaluated in microbial-induced calcite precipitation (MICP) application. The liquid limit value of the natural lateritic soil was used to prepare samples with three mix proportions of the bacteria and cementation reagent (i.e., 25% bacteria-75% cementation reagent, 50% bacteria-50% cementation reagent and 75% bacteria-25% cementation reagent). The S. pasteurii suspension densities used to trigger the MICP process are 0, 0.5, 2.0, 4.0, 6.0 and 8.0 McFarland standards (i.e., 0, 1.50 × 10 8 , 6.0 × 10 8 , 1.20 × 10 9 , 1.80 × 10 9 and 2.40 × 10 9 cells/ml, respectively). Tests carried out on the treated specimens include Atterberg limits and linear shrinkage as well as calcite content using the acid wash method. Results obtained showed a general decrease in the Atterberg limit values with higher S. pasteurii suspension density. The best improvement of plasticity index was achieved for lateritic soil prepared with 75% S. pasteurii and 25% cementation reagent at S. pasteurii suspension density of 2.40 × 10 9 cells/ml with a corresponding peak 6.0% calcite content. Also, a maximum 4% contaminant concentration of a synthetic leachate produced the best S. pasteurii growth pattern.

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“…This may affect the mineralogy of CaCO 3 by inhibiting the formation of rhombohedral calcite crystals [32]. Khodadadi Tirkolaei [33] demonstrated the change in morphology of the microbially-induced calcium carbonate precipitates in the presence of seawater. He showed that aragonite precipitated together with calcite in MICP solution containing seawater.…”

Section: Introductionmentioning

confidence: 99%

“…Seawater might be also used as a source of calcium for the biologically-induced calcium carbonate precipitation [34]. Salinity of seawater may also affect the chemical efficiency of microbially-and enzyme-induced carbonate precipitation [4,33]. High ionic strength of solution may also lead to precipitation of enzyme proteins (i.e., salt out) [35].…”

Section: Introductionmentioning

confidence: 99%

Biocementation of Calcareous Beach Sand Using Enzymatic Calcium Carbonate Precipitation

2020

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Beach sands are composed of a variety of minerals including quartz and different carbonate minerals. Seawater in beach sand contains several ions such as sodium, magnesium, calcium, chloride, sulfate, and potassium. These variations in mineralogy and the presence of salts in beach sand may affect the treatment via enzyme-induced carbonate precipitation (EICP). In this study, set test tube experiments were conducted to evaluate the precipitation kinetics and mineral phase of the precipitates in the presence of zero, five, and ten percent seawater (v/v). The kinetics were studied by measuring electrical conductivity (EC), pH, ammonium concentration, and carbonate precipitation mass in EICP solution at different time intervals. A beach sand was also treated using EICP solution containing zero and ten percent seawater at one, two, and three cycles of treatment. Unconfined compressive strength (UCS), carbonate content, and mineralogy of the precipitates in the treated specimens were evaluated. The kinetics study showed that the rate of urea hydrolysis and the rate of precipitation for zero, five, and ten percent seawater were similar within the first 16 h of the reaction. After 16 h, it was observed that the rates dropped in the solution containing seawater, which might be attributed to the faster decay rate of urease enzyme when seawater is present. All the precipitates from the test tube experiments contained calcite and vaterite, with an increase in vaterite content by increasing the amount of seawater. The presence of ten percent seawater was found to not significantly affect the UCS, carbonate content, and mineralogy of the precipitates of the treated beach sand.

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Estimation on ureolysis-based microbially induced calcium carbonate precipitation progress for geotechnical applications

Cited by 17 publications

References 16 publications

Compatibility of Landfill Leachate with Compacted Biocemented Lateritic Soil Through Microbial Induced Calcite Precipitation Technique

Compatibility of Landfill Leachate with Compacted Biocemented Lateritic Soil Through Microbial Induced Calcite Precipitation Technique

Plasticity characteristics of lateritic soil treated with Sporosarcina pasteurii in microbial-induced calcite precipitation application

Biocementation of Calcareous Beach Sand Using Enzymatic Calcium Carbonate Precipitation

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