Impact of soil density on biomineralization using EICP and MICP techniques for earthen sites consolidation

Li, Jie; Zhu, Feiqing; Wu, Fasi; Chen, Yuxin; Richards, Jenny; Li, Tianxiao; Li, Ping; Shang, Dongjuan; Yu, Jing; Viles, Heather; Guo, Qinglin

doi:10.1016/j.jenvman.2024.121410

Journal of Environmental Management

2024

DOI: 10.1016/j.jenvman.2024.121410

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Impact of soil density on biomineralization using EICP and MICP techniques for earthen sites consolidation

Jie Li,

Feiqing Zhu,

Fasi Wu

et al.

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Cited by 11 publications

References 68 publications

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The effect of different additives on bacteria adsorption, compressive strength and ammonia removal for MICP

Hanisch,

Pechtl,

Maurer

et al. 2024

Environ Earth Sci

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Microbial induced calcite precipitation is a commonly used technique for the application of biocementation. The metabolism of urea by ureolytic active bacteria leads, among other metabolic products such as ammonium, to carbonate ions. In the presence of calcium ions, calcium carbonate formation occurs. It was investigated whether the addition of different additives (Ca-bentonite, Na-bentonite, clinoptilolite, natrolite, limestone, marl clay, concresol, secursol, and activated carbon powder) can optimize this process. First, the influence of these additives on the adsorption rates and distribution of the ureolytic active organism Sporosarcina pasteurii in quartz sand columns was tested. Moreover, an investigation was conducted on the impact of various additives on ammonium immobilization to mitigate its leaching from soils subjected to the biocementation process. For eight additives uniaxial compressive strength tests in quartz sand columns and a storage method according to DIN EN 12390–2 were carried out. Each additive showed a characteristic adsorption and localisation progression. Furthermore, each additive was able to enhance the immobilization behavior of the present ammonium, with a maximum immobilization capacity of 10.76 $$\frac{mg (NH^+_4)}{g (additive)}$$ m g ( N H 4 + ) g ( a d d i t i v e ) . The uniaxial compressive strength of biocemented columns out of quartz sand could sectionally be increased by the addition of each additive. However, the storage methodology shows a much greater influence on column strength. Overall, the best results were achieved with the two additives, Ca-bentonite and clinoptilolite, resulting in strength increases in sand columns of up to 4.64 and 3.22 $$\frac{N}{mm^2}$$ N m m 2 , respectively.

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The effect of different additives on bacteria adsorption, compressive strength and ammonia removal for MICP

Hanisch,

Pechtl,

Maurer

et al. 2024

Environ Earth Sci

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The solidification of heavy metal Pb2+-contaminated soil by enzyme-induced calcium carbonate precipitation combined with biochar

Bai,

Chen,

Zhang

et al. 2024

Biochemical Engineering Journal

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Recent developments and future prospects of micro-organisms in enhancement of soil for geotechnical engineering applications: A review

Shukla,

Sharma

2024

Bioresource Technology Reports

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Impact of soil density on biomineralization using EICP and MICP techniques for earthen sites consolidation

Cited by 11 publications

References 68 publications

The effect of different additives on bacteria adsorption, compressive strength and ammonia removal for MICP

The effect of different additives on bacteria adsorption, compressive strength and ammonia removal for MICP

The solidification of heavy metal Pb2+-contaminated soil by enzyme-induced calcium carbonate precipitation combined with biochar

Recent developments and future prospects of micro-organisms in enhancement of soil for geotechnical engineering applications: A review

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