Factors affecting the performance of microbial-induced carbonate precipitation (MICP) treated soil: a review

Tang, Chao‐Sheng; Yin, Liang; Jiang, Ning‐Jun; Zhu, Cheng; Zhou, Hao; Li, Hao; Shi, Bin

doi:10.1007/s12665-020-8840-9

Cited by 214 publications

(72 citation statements)

References 76 publications

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“…Hence, more publicity is required to increase awareness of the detrimental consequences of soil erosion and related dust problems, in addition to no littering, and more research needs to be conducted in order to develop easily applied methods for erosion reduction and dust control. Recently some microbial geotechnical techniques have been developed for erosion and dust control (Chu et al 2012;Dejong et al 2013;Stabnikov et al 2013;Tang et al, 2020). However, the use of bacteria for experimental purposes in actual in-situ conditions can be sensitive.…”

Section: Pathogen-soil Interactionsmentioning

confidence: 99%

Environmental geotechnics: challenges and opportunities in the post-Covid-19 world

Tang

Paleologos

Vitone

et al. 2021

Environmental Geotechnics

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Section: Pathogen-soil Interactionsmentioning

confidence: 99%

Environmental geotechnics: challenges and opportunities in the post-Covid-19 world

Tang

Paleologos

Vitone

et al. 2021

Environmental Geotechnics

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“…Microbial-induced carbonate precipitation (MICP) is a novel bio-cementation technique, which has gained an increased attention among geotechnical researchers (DeJong et al 2010;Achal and Mukherjee 2015;Tang et al 2020). MICP is an environmentally friendly process that mediates nonpathogenic bacteria containing active urease enzymes.…”

Section: Introductionmentioning

confidence: 99%

Durability analysis of bio-cemented slope soil under the exposure of acid rain

2021

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Purpose Instability of slope surface is a critical concern in Geotechnical and Environmental Engineering. MICP (Microbial-Induced Carbonate Precipitation), an innovative bio-cementation technique, has attracted the attention for slope surface protection. In this work, MICP was investigated to evaluate its durability under the exposure of acid rain and to advance the understanding on long-term performance of slope soil preserved by MICP. Methods MICP treatment was applied to a fine-grained slope soil using indigenous bacteria. Specimens treated to different cementation levels (% CaCO3) were exposed to acid rain (of varying pH) through two sorts of mechanisms: (i) infiltration and (ii) immersion. The evaluations were based on corrosion of CaCO3, mass loss, needle penetration tests, and scanning electron microscopy. Results The decrease in pH increased the corrosion of CaCO3, resulting in considerable loss in aggregate and unconfined compressive strength. However, increased cementation level showed high durability of specimens. The soils treated to 12.5% CaCO3 showed 19.9% soil loss, whereas it was reduced to 5.4% when cemented to 22.5% CaCO3. The results also revealed that the contact time of acid rain significantly governed the rate of corrosion, i.e., specimens subjected to lower infiltration rate (20 mm/h) showed higher loss of mass compared to that of higher rate (100 mm/h). Conclusion The long-term performance of MICP treatment is determined by (i) cementation level, (ii) pH, and (iii) infiltration rate of acid rain. High cementation level promotes the longevity of the treatment. Therefore, MICP to higher cementation level is recommended for long-term preservation of slope surface.

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“…MICP is a naturally driven biological method that makes an in situ cementing agent known as calcium carbonate or calcite using bacterial metabolism [8]. The role of bacteria or microorganisms in the precipitation of calcium carbonate in the MICP process is correlated with: producing carbonates, (increasing ambient pH and nucleation sites in saturated solutions [9]. The soil modification technology based on MICP is more superficial than other soil modification technology and has low environmental effects.…”

Section: Introductionmentioning

confidence: 99%

Bioremediation of Coal Contaminated Soil as the Road Foundations Layer

Indriani¹

2021

GEOMATE

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Waste area ex-coal mining land is left without proper management and utilization. After analysis, ex-mining land material can be reused as road construction material by increasing mechanical properties. Microbial-induced calcite precipitation (MICP) is a soil improvement technique using microorganisms capable of altering and enhancing their mechanical and physical properties. In this study, an unconfined compressive test was used to see the effect of calcite precipitation on the behavior of the unconfined compressive strength of sand contaminated with coal. Variations in the concentration of Bacillus subtilis were applied as much as 3%, 4.5%, and 6% on sand contaminated with coal. The bacteria used were 3 days of culture was still in the stationary phase and 6 days of culture in the dead phase. After 28 days of curing, there is a significant increase in the UCS values of the MICP-stabilized soil compared to the untreated soil. The use of 3 days of bacterial culture was more effective in increasing the UCS value than 6 days of culture. At optimum conditions, the UCS value increased up to 15 times after the 28-day curing period. As a conclusion the ex-mining land material after treated with MICP using Bacillus subtilis, it can be reused and qualifies as a road construction material.

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Factors affecting the performance of microbial-induced carbonate precipitation (MICP) treated soil: a review

Cited by 214 publications

References 76 publications

Environmental geotechnics: challenges and opportunities in the post-Covid-19 world

Environmental geotechnics: challenges and opportunities in the post-Covid-19 world

Durability analysis of bio-cemented slope soil under the exposure of acid rain

Bioremediation of Coal Contaminated Soil as the Road Foundations Layer

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