Microbially induced carbonate precipitation for wind erosion control of desert soil: Field-scale tests

Meng, Hao; Gao, Yufeng; He, Jia; Qi, Yongshuai; Lei, Hang

doi:10.1016/j.geoderma.2020.114723

Cited by 123 publications

(33 citation statements)

References 49 publications

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“…A uniform crust was formed and able to provide considerable protection for aeolian sand against erosion by airflow at different velocities. Meng et al (2021) performed a field‐scale test to investigate the efficiency of reducing wind erosion via MICP. Under the optimal condition, the thickness of the soil crust reached up to 12.5 mm and the bearing capacity exceeded 300 kPa.…”

Section: Promising Applications Of Micpmentioning

confidence: 99%

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Bio‐mediated soil improvement: An introspection into processes, materials, characterization and applications

Jiang

Wang

Chu

et al. 2021

Soil Use and Management

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For a long time in the practice of geotechnical engineering, soil has been viewed as an inert material, comprising only inorganic phases. However, microorganisms including bacteria, archaea and eukaryotes are ubiquitous in soil and have the capacity and capability to alter bio‐geochemical processes in the local soil environment. The cumulative changes could consequently modify the physical, mechanical, conductive and chemical properties of the bulk soil matrix. In recent years, the topic of bio‐mediated geotechnics has gained momentum in the scientific literature. It involves the manipulation of various bio‐geochemical soil processes to improve soil engineering performance. In particular, the process of microbial‐induced calcium carbonate precipitation (MICP) has received the most attention for its superior performance for soil improvement. The present work aims to shape a comprehensive understanding of recent developments in bio‐mediated geotechnics, with a focus on MICP. Referring to around one hundred studies published over the past five years, this review focuses on popular and alternative MICP processes, innovative raw materials and additives for MICP, emerging tools and testing methodologies for characterizing MICP at multi‐scale, and applications in emerging and/or unconventional geotechnical fields.

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Section: Promising Applications Of Micpmentioning

confidence: 99%

“…Under the optimal condition, the thickness of the soil crust reached up to 12.5 mm and the bearing capacity exceeded 300 kPa. So far, the high cost is the major challenge for the use of MICP in desert areas mainly because of logistics and harsh environments (Meng et al, 2021).…”

Section: Promising Applications Of Micpmentioning

confidence: 99%

Bio‐mediated soil improvement: An introspection into processes, materials, characterization and applications

Jiang

Wang

Chu

et al. 2021

Soil Use and Management

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“…Figure 7 [25] is a schematic diagram of the test system. Meng et al [26] conducted outdoor experiments in Ulan Buh Desert, and the results confirmed that the use of Sporosarcina pasteurii to consolidate desert soil could improve the wind erosion resistance of soil. Outdoor microbial sand fixation experiments need to overcome many difficulties and the cost is relatively high.…”

Section: Introductionmentioning

confidence: 84%

“…Up until now, very few experiments on microbial sand consolidation technology have been conducted in deserts. Meng et al [26] conducted field experiments with MICP in the Ulan Buh Desert and found that MICP can improve the resistance of sand to wind erosion. The high temperature of the desert made it easy for the solution to evaporate and posed a significant challenge to the survival of the species.…”

Section: Conclusion and Suggestions For Future Researchmentioning

confidence: 99%

Critical Review of Solidification of Sandy Soil by Microbially Induced Carbonate Precipitation (MICP)

et al. 2021

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Microbially induced carbonate precipitation (MICP) is a promising technology for solidifying sandy soil, ground improvement, repairing concrete cracks, and remediation of polluted land. By solidifying sand into soil capable of growing shrubs, MICP can facilitate peak and neutralization of CO2 emissions because each square meter of shrub can absorb 253.1 grams of CO2 per year. In this paper, based on the critical review of the microbial sources of solidified sandy soil, models used to predict the process of sand solidification and factors controlling the MICP process, current problems in microbial sand solidification are analyzed and future research directions, ideas and suggestions for the further study and application of MICP are provided. The following topics are considered worthy of study: (1) MICP methods for evenly distributing CaCO3 deposit; (2) minimizing NH4+ production during MICP; (3) mixed fermentation and interaction of internal and exogenous urea-producing bacteria; (4) MICP technology for field application under harsh conditions; (5) a hybrid solidification method by combining MICP with traditional sand barrier and chemical sand consolidation; and (6) numerical model to simulate the erosion resistance of sand treated by MICP.

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“…Soil erosion resistance refers to the resistance of soil to the dispersion and transport of erosion force, which is also one of the important parameters to evaluate soil erosion resistance, and its magnitude mainly depends on the affinity of soil to water and the adhesive force between soil particles (Meng et al 2021). The area of sloping farmland in China is large, and its water and soil loss account for a large proportion of the total water and soil loss (Xiang et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Effects of cultivating different crops on soil erosion of slope farmland

Guo¹,

2021

Bangladesh J. Bot.

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The soil nutrient content, particle size composition, crop yield and erosion resistance were studied considering the slope farmland with different slope sizes and different crops as the research object. The results showed that the available phosphorus content was higher under the wheat planting mode. Rape planting was conducive to the accumulation of organic matter, total nitrogen and available potassium, and nutrient accumulation was more obvious when treated at 5° slope. The soil texture was sandy loam under the wheat planting mode. After rapeseed planting, the soil texture began to change to silt loam. The crop yield was the highest under different planting modes at 5°. Rapeseed was found to increase the soil erosion resistance of sloping farmland compared with wheat, and the greater was the slope, the stronger the erosion resistance. Bangladesh J. Bot. 50(3): 925-932, 2021 (September) Special

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Microbially induced carbonate precipitation for wind erosion control of desert soil: Field-scale tests

Cited by 123 publications

References 49 publications

Bio‐mediated soil improvement: An introspection into processes, materials, characterization and applications

Bio‐mediated soil improvement: An introspection into processes, materials, characterization and applications

Critical Review of Solidification of Sandy Soil by Microbially Induced Carbonate Precipitation (MICP)

Effects of cultivating different crops on soil erosion of slope farmland

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