A comparative investigation of using microbial- and CO2-induced carbonate minerals in sustainable soil Improvement

Zangani, Alireza; Keykha, Hamed A.; Romiani, Hadi Mohamadzadeh; Asadi, Afshin; Kawasaki, Satoru; Radmanesh, Niloofar

doi:10.21203/rs.3.rs-1207809/v1

Cited by 3 publications

(1 citation statement)

References 24 publications

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“…Since then, more and more researchers have begun to conduct in-depth research on this technology. It can be better applied to the fields such as sand control [4,5], heavy metal fixation [6,7], crack repair [8,9], reservoir profile control and water plugging [10,11], and CO 2 capture and storage [12,13] by changing various factors. In the future, it will be applied to a wider range of fields with the further maturity of this technology.…”

Section: Introductionmentioning

confidence: 99%

Research status and development of microbial induced calcium carbonate mineralization technology

et al. 2022

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In nature, biomineralization is a common phenomenon, which can be further divided into authigenic and artificially induced mineralization. In recent years, artificially induced mineralization technology has been gradually extended to major engineering fields. Therefore, by elaborating the reaction mechanism and bacteria of mineralization process, and summarized various molecular dynamics equations involved in the mineralization process, including microbial and nutrient transport equations, microbial adsorption equations, growth equations, urea hydrolysis equations, and precipitation equations. Because of the environmental adaptation stage of microorganisms in sandy soil, their reaction rate in sandy soil environment is slower than that in solution environment, the influencing factors are more different, in general, including substrate concentration, temperature, pH, particle size and grouting method. Based on the characteristics of microbial mineralization such as strong cementation ability, fast, efficient, and easy to control, there are good prospects for application in sandy soil curing, building improvement, heavy metal fixation, oil reservoir dissection, and CO2 capture. Finally, it is discussed and summarized the problems and future development directions on the road of commercialization of microbial induced calcium carbonate precipitation technology from laboratory to field application.

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Section: Introductionmentioning

confidence: 99%

Research status and development of microbial induced calcium carbonate mineralization technology

et al. 2022

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Neutralization and CO2 fixation behavior of alkaline recycled soil using column tests with CO2 ventilation

Mon,

Sakaguchi,

Hayano

et al. 2024

Acta Geotech.

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Column tests were conducted to elucidate the pH neutralization and CO2 fixation behavior of alkaline recycled soils permeated with CO2. The ventilation period required for complete CO2 fixation (tEOF) was estimated from the test results of each column. The maximum amount of CO2 captured per gram of dry soil ((mCO2)max) was determined based on the inflow and outflow of CO2 for each specimen. The investigation into the effects of soil density, specimen height, CO2 gas concentration, and flow rate on tEOF and (mCO2)max revealed that tEOF increased with higher dry density (ρd) or specimen height (H), as a denser and larger specimen consumed more CO2 gas. Conversely, tEOF decreased with a higher CO2 gas concentration (C) or flow volume (Q) because a low C or Q resulted in an insufficient CO2 gas supply to match the consumption induced by the reaction. Lower C and Q tended to yield higher (mCO2)max, whereas higher ρd and H resulted in higher (mCO2)max. Furthermore, (mCO2)max increased with tEOF, with a slight reduction in pH after neutralization with increased tEOF. This phenomenon was attributed to the longer ventilation period enabling more Ca to react with the CO2 gas and maintain the equilibrium state of the reaction. Finally, the evaluation of the CO2 consumption rate (CSR) for each column specimen revealed that a higher C and Q resulted in a lower CSR, whereas a higher H resulted in a higher CSR. Additionally, a longer tEOF was associated with a higher CSR, although some variation was observed.

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Effects of stabilizers on CO2 fixation capacity in neutralization of alkali construction sludge

Mon,

Sakaguchi,

Raihan

et al. 2023

Soils and Foundations

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A comparative investigation of using microbial- and CO2-induced carbonate minerals in sustainable soil Improvement

Cited by 3 publications

References 24 publications

Research status and development of microbial induced calcium carbonate mineralization technology

Research status and development of microbial induced calcium carbonate mineralization technology

Neutralization and CO2 fixation behavior of alkaline recycled soil using column tests with CO2 ventilation

Effects of stabilizers on CO2 fixation capacity in neutralization of alkali construction sludge

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