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学者姓名:赖汉江

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Seawater-based bacterial enzyme induced carbonate precipitation for biomineralization of calcareous sand Scopus
期刊论文 | 2025 | Acta Geotechnica
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Abstract :

Biomineralization has been used for the treatment of calcareous sand to improve its properties. Although many studies have been performed on the biomineralized calcareous sand under freshwater conditions, few studies were focused on the behaviors of calcareous sand in seawater. As the freshwater is scarce in island areas, the freshwater-based biomineralization technology may be unsuitable for the treatment. In this study, seawater-based bacterial enzyme induced carbonate precipitation (BEICP) was proposed to treat calcareous sand. A series of tests were conducted to verify the feasibility and efficiency of this treatment method through investigating the effects of seawater on the biomineralization and the properties of biomineralized calcareous sand in comparison with microbially induced carbonate precipitation (MICP). Test results reveal that seawater leads to the decrease of urease activity of bacterial cells and urease. NaCl, MgCl2, Na2SO4, and CaCl2 are the main inhibitory components in seawater, of which MgCl2 and CaCl2 have a strong influence on the urease activity of bacterial cells and urease, respectively. Compared to MICP treatment, BEICP-treated calcareous sand exhibits higher unconfined compressive strength and better biomineralization effects. The findings of this study can contribute to the application of biomineralization technology in island areas. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2025.

Keyword :

Bacterial enzyme-induced carbonate precipitation Bacterial enzyme-induced carbonate precipitation Biomineralization Biomineralization Calcareous sand Calcareous sand Seawater Seawater Strength Strength

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GB/T 7714 Cui, M.-J. , Wu, J.-B. , Lai, H.-J. et al. Seawater-based bacterial enzyme induced carbonate precipitation for biomineralization of calcareous sand [J]. | Acta Geotechnica , 2025 .
MLA Cui, M.-J. et al. "Seawater-based bacterial enzyme induced carbonate precipitation for biomineralization of calcareous sand" . | Acta Geotechnica (2025) .
APA Cui, M.-J. , Wu, J.-B. , Lai, H.-J. , Huang, M. , Zheng, J.-J. , Hu, X. et al. Seawater-based bacterial enzyme induced carbonate precipitation for biomineralization of calcareous sand . | Acta Geotechnica , 2025 .
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Enzyme-Induced Carbonate Precipitation for the Stabilization of Heavy Metal-Contaminated Landfill Soils: A Sustainable Approach to Resource Recovery and Environmental Remediation SCIE SSCI
期刊论文 | 2025 , 17 (10) | SUSTAINABILITY
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Abstract :

Heavy metal pollution in landfill soil poses a dual challenge of environmental toxicity and resource depletion. Enzyme-induced carbonate precipitation (EICP) was systematically evaluated as a sustainable stabilization method for cadmium (Cd), lead (Pb), and chromium (Cr) under both solution- and soil-phase conditions. Laboratory-scale experiments demonstrated that EICP achieved over 80% removal efficiency for Cd, Pb, and copper (Cu) in solution-phase systems, while soil-phase trials focused on Cd, Pb, and Cr to simulate realistic field conditions. Optimal performance was achieved using a 1:1 molar ratio of soybean-derived urease (1.0 U/mL) to CaCl2 (0.5 M), with Cd stabilization reaching 91.5%. Vacuum-assisted filtration improved treatment uniformity by 29.2% in clay soils. X-ray diffraction identified crystalline otavite in Cd systems, while Pb and Cu were stabilized via surface adsorption. Sequential extraction confirmed that over 70% of Cd was transformed into carbonate-bound phases. Treated soils met TCLP leaching standards and reuse criteria, maintaining neutral pH (7.2-8.1) and low salinity. Compared to cement-based methods, EICP avoids CO2 release from calcination and fossil fuel use. Carbon in urea is retained as solid CaCO3, reducing emissions by 0.3-0.5 t CO2-eq per ton of soil. These findings support EICP as a scalable, low-carbon alternative for landfill soil remediation.

Keyword :

biomineralization biomineralization carbonate precipitation carbonate precipitation metal immobilization metal immobilization soil remediation soil remediation urease urease

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GB/T 7714 Xu, Wangqing , Zheng, Junjie , Cui, Mingjuan et al. Enzyme-Induced Carbonate Precipitation for the Stabilization of Heavy Metal-Contaminated Landfill Soils: A Sustainable Approach to Resource Recovery and Environmental Remediation [J]. | SUSTAINABILITY , 2025 , 17 (10) .
MLA Xu, Wangqing et al. "Enzyme-Induced Carbonate Precipitation for the Stabilization of Heavy Metal-Contaminated Landfill Soils: A Sustainable Approach to Resource Recovery and Environmental Remediation" . | SUSTAINABILITY 17 . 10 (2025) .
APA Xu, Wangqing , Zheng, Junjie , Cui, Mingjuan , Lai, Hanjiang . Enzyme-Induced Carbonate Precipitation for the Stabilization of Heavy Metal-Contaminated Landfill Soils: A Sustainable Approach to Resource Recovery and Environmental Remediation . | SUSTAINABILITY , 2025 , 17 (10) .
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Enzyme-Induced Carbonate Precipitation for the Stabilization of Heavy Metal-Contaminated Landfill Soils: A Sustainable Approach to Resource Recovery and Environmental Remediation Scopus
期刊论文 | 2025 , 17 (10) | Sustainability (Switzerland)
Sustainable heavy metal immobilization in contaminated soils using plant-derived urease-driven biomineralization SCIE
期刊论文 | 2025 , 20 (9) | PLOS ONE
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Abstract :

Soil contamination by heavy metals presents substantial ecological and geotechnical risks, thereby demanding sustainable remediation strategies. Conventional approaches, including chemical stabilization and microbial-induced carbonate precipitation (MICP), are limited by high costs, ecological disturbances, and sensitivity to environmental stressors. A plant-derived urease-driven enzyme-induced carbonate precipitation (EICP) system was evaluated for immobilizing cadmium (Cd2(+)), lead (Pb2(+)), and zinc (Zn2(+)) in contaminated soils. Systematic screening revealed that jack bean and watermelon seed ureases are optimal catalysts for heavy metal sequestration, achieving efficiencies of 87.3% for Cd2 (+) , 91.5% for Pb2 (+) , and 76.4% for Zn2 (+) . These high efficiencies are attributed to their catalytic specificity and the retained enzymatic activity under environmental stress. Critical process parameters were fine-tuned through iterative experimentation, maintaining a urea-CaCl2 reaction stoichiometry of 1.5:1 molar ratio and calibrating the enzyme dosage to 1.2 U/g of soil matrix. This optimized operational range effectively promoted carbonate mineralization while preserving essential soil hydraulic properties, as evidenced by sustained permeability exceeding 10 (-) (5) cm/s throughout precipitation cycles. Durability assessments under simulated acid rain and freeze-thaw cycles demonstrated 82.5% retention of Cd2(+) and 92.7% retention of unconfined compressive strength, outperforming conventional lime and MICP treatments. X-ray diffraction analysis confirmed the presence of stable crystalline phases. Field validation confirmed that the EICP protocol can be feasibly scaled to real-world sites with operational costs averaging $52 per cubic meter, representing a 61% reduction compared to microbial-based treatments. This plant-based EICP approach offers a scalable and cost-effective solution for ecological restoration and geotechnical stabilization in contaminated soils, demonstrating significant potential for sustainable environmental management.

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GB/T 7714 Xu, Wangqing , Zheng, Junjie , Lai, Hanjiang et al. Sustainable heavy metal immobilization in contaminated soils using plant-derived urease-driven biomineralization [J]. | PLOS ONE , 2025 , 20 (9) .
MLA Xu, Wangqing et al. "Sustainable heavy metal immobilization in contaminated soils using plant-derived urease-driven biomineralization" . | PLOS ONE 20 . 9 (2025) .
APA Xu, Wangqing , Zheng, Junjie , Lai, Hanjiang , Cui, Mingjuan . Sustainable heavy metal immobilization in contaminated soils using plant-derived urease-driven biomineralization . | PLOS ONE , 2025 , 20 (9) .
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Modified one-phase-low-pH EICP method using low-pH cementation solution for soil biomineralization SCIE
期刊论文 | 2025 , 20 (8) , 4133-4146 | ACTA GEOTECHNICA
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Abstract :

One-phase-low-pH method is a simple, efficient and easy-to-use biogrouting method for biomineralization based on an Enzyme Induced Carbonate Precipitation (EICP) process. This method utilizes the low-pH biotreatment solution (a mixture of urease solution and cementation solution) to provide a lag period for the biomineralization process, allowing the biotreatment solution to be uniformly distributed within the soil and thereby improving the uniform distribution of calcium carbonate. The existing one-phase-low-pH method uses a low pH urease solution to prepare the biotreatment solution. However, long-term exposure to a low pH environment may result in a decrease in activity or even inactivation of urease, which is not conducive to the practical application of this technology. In this study, a modified one-phase-low-pH method using low pH cementation solution is proposed. Three sets of tests, including urease activity durability tests, solution tests, and sand column treatment tests, were conducted in this study to clarify the necessity and feasibility of the modified method. The test results showed that the acidic environment accelerated the decrease of urease activity over time. This phenomenon would be more pronounced at a lower pH, and urease would be immediately inactive at a pH lower than 4.5. Meanwhile, a high chemical concentration would also lead to a decrease in activity or even inactivation of urease. If urease is active and the initial pH of the biotreatment solution is higher than 4.5, the pH of the biotreatment solution will rapidly rise to a weakly alkaline state and enzyme-induced carbonate precipitation can occur. A biotreatment solution that would produce relatively uniform biomineralization can be prepared by using cementation solution with a pH range of 1.25-3.5 and bacterial urease solution in a volume ratio of 1:1. For the sand column with relatively uniform biomineralization, the pH of the cementation solution (or the initial pH of the biotreatment solution) has a negligible effect on the strength enhancement for similar calcium carbonate content.

Keyword :

Biomineralization Biomineralization Enzyme induced carbonate precipitation (EICP) Enzyme induced carbonate precipitation (EICP) Low pH cementation solution Low pH cementation solution One-phase-low-pH biogrouting method One-phase-low-pH biogrouting method Urease activity Urease activity

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GB/T 7714 Chen, Yi-Wei , Cui, Ming-Juan , Lai, Han-Jiang et al. Modified one-phase-low-pH EICP method using low-pH cementation solution for soil biomineralization [J]. | ACTA GEOTECHNICA , 2025 , 20 (8) : 4133-4146 .
MLA Chen, Yi-Wei et al. "Modified one-phase-low-pH EICP method using low-pH cementation solution for soil biomineralization" . | ACTA GEOTECHNICA 20 . 8 (2025) : 4133-4146 .
APA Chen, Yi-Wei , Cui, Ming-Juan , Lai, Han-Jiang , Zheng, Jun-Jie , Ren, Yu-Xiao . Modified one-phase-low-pH EICP method using low-pH cementation solution for soil biomineralization . | ACTA GEOTECHNICA , 2025 , 20 (8) , 4133-4146 .
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Modified one-phase-low-pH EICP method using low-pH cementation solution for soil biomineralization Scopus
期刊论文 | 2025 , 20 (8) , 4133-4146 | Acta Geotechnica
Extraction of high activity bacterial urease and its application to biomineralization of soil SCIE
期刊论文 | 2025 , 17 (3) , 1847-1861 | JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
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Abstract :

Biomineralization based on bacterial enzyme induced carbonate precipitation (BEICP) process is a promising alternative to cement-based ground treatment technology. The bacterial urease used in BEICP process is usually ultrasonic extracted from urease-producing bacteria. To efficiently extract urease with relatively higher activity from bacterial cells, the ultrasonic extraction parameters of urease were optimized in this study. Next, a series of bacterial urease extraction tests and sand column treatment tests were conducted to investigate the effects of vibration amplitude, upper temperature limit, and cooling method on the urease extraction process and biomineralization of sand. The results show that the upper temperature limit is an important factor affecting the extraction efficiency and the activity of the extracted urease solution, and the optimum upper temperature limit is 50 degrees C. The results indicate that increasing vibration amplitude could improve the extraction efficiency, but it hardly affects the urease activity (UA) under the optimal temperature. Continuous cooling could effectively simplify the operation and further improve the efficiency of urease extraction. Under the same urease activity of biotreatment solution, there is no marked difference in calcium carbonate content (CCC) and unconfined compressive strength of biomineralized sand columns prepared by urease solution extracted with different vibration amplitudes and upper temperature limits. The results of this study could provide a reference for application of BEICP technology of urease extraction to large-scale soil treatment. (c) 2025 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/ 4.0/).

Keyword :

Bacterial enzyme induced carbonate Bacterial enzyme induced carbonate Biomineralization Biomineralization precipitation (BEICP) precipitation (BEICP) Soil improvement Soil improvement Ultrasound Ultrasound Urease extraction Urease extraction

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GB/T 7714 Lai, Hanjiang , Chen, Yiwei , Cui, Mingjuan et al. Extraction of high activity bacterial urease and its application to biomineralization of soil [J]. | JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING , 2025 , 17 (3) : 1847-1861 .
MLA Lai, Hanjiang et al. "Extraction of high activity bacterial urease and its application to biomineralization of soil" . | JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 17 . 3 (2025) : 1847-1861 .
APA Lai, Hanjiang , Chen, Yiwei , Cui, Mingjuan , Zheng, Junjie , Chen, Zhibo . Extraction of high activity bacterial urease and its application to biomineralization of soil . | JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING , 2025 , 17 (3) , 1847-1861 .
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Extraction of high activity bacterial urease and its application to biomineralization of soil Scopus
期刊论文 | 2025 , 17 (3) , 1847-1861 | Journal of Rock Mechanics and Geotechnical Engineering
Extraction of high activity bacterial urease and its application to biomineralization of soil Scopus
期刊论文 | 2024 , 17 (3) , 1847-1861 | Journal of Rock Mechanics and Geotechnical Engineering
Synergistic pH-bioadditive strategy for self-healing concrete: Achieving high-efficiency calcite crystallization and sustainable infrastructure rehabilitation EI
期刊论文 | 2025 , 484 | Construction and Building Materials
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Abstract :

An innovative microbial remediation protocol is proposed to overcome critical limitations of conventional microbial-induced carbonate precipitation (MICP) for concrete crack repair. The method integrates pH preconditioning of Sporosarcina pasteurii with a bioadditive-assisted crystallization strategy to address microbial inactivation under highly alkaline conditions, inefficient calcium utilization, and structural instability caused by metastable vaterite formation. Acidification to pH 5.5 preserved 78 % of urease activity at pH 12.5 by stabilizing bacterial zeta potential, while a composite bioadditive composed of polyvinyl alcohol, sodium alginate, and colloidal silica nanoparticles reduced the critical nucleation radius by 29 %, enhancing calcite crystal formation. Mechanical testing showed a 26.8 % increase in flexural strength and an 88.7 % calcium utilization rate, with durability evaluations confirming stable crack sealing over 180 thermal-humidity cycles. Field-scale application to a deteriorated underground garage demonstrated 92 % void-filling efficiency and compressive strength recovery from 28.5 MPa to 41.2 MPa. The developed protocol eliminates the need for carrier materials and reduces carbon emissions, establishing a scalable and sustainable framework for infrastructure rehabilitation. These results highlight the potential of synergistic biological and material strategies for advancing next-generation self-healing concrete technologies. © 2025

Keyword :

Bending strength Bending strength Bending tests Bending tests Biological materials preservation Biological materials preservation Carbon carbon composites Carbon carbon composites Compression testing Compression testing Compressive strength Compressive strength Cracks Cracks Fracture testing Fracture testing Hardness testing Hardness testing High performance concrete High performance concrete Self compacting concrete Self compacting concrete Self-healing materials Self-healing materials Tensile testing Tensile testing

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GB/T 7714 Xu, Wangqing , Lai, Hanjiang , Cui, Mingjuan et al. Synergistic pH-bioadditive strategy for self-healing concrete: Achieving high-efficiency calcite crystallization and sustainable infrastructure rehabilitation [J]. | Construction and Building Materials , 2025 , 484 .
MLA Xu, Wangqing et al. "Synergistic pH-bioadditive strategy for self-healing concrete: Achieving high-efficiency calcite crystallization and sustainable infrastructure rehabilitation" . | Construction and Building Materials 484 (2025) .
APA Xu, Wangqing , Lai, Hanjiang , Cui, Mingjuan , Zheng, Junjie . Synergistic pH-bioadditive strategy for self-healing concrete: Achieving high-efficiency calcite crystallization and sustainable infrastructure rehabilitation . | Construction and Building Materials , 2025 , 484 .
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Experimental Study on Multiscale Engineering Properties of EICP Combined with Xanthan Gum Solidified Sand SCIE
期刊论文 | 2024 , 36 (6) | JOURNAL OF MATERIALS IN CIVIL ENGINEERING
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Abstract :

In this study, enzyme-induced carbonate precipitation (EICP) combined with xanthan gum curing technology was used to improve the engineering properties of standard sand, and the curing effect of EICP combined with different xanthan gum contents was studied by macroscopic tests such as unconfined compressive strength, direct shear, permeability, calcium carbonate content, and microscopic tests such as scanning electron microscope and nuclear magnetic resonance. The results show that the unconfined compressive strength, shear strength, cohesion and internal friction angle of EICP combined with xanthan gum solidified sand increases with the increase of xanthan gum content and reaches the maximum value at the content of 2%, in which the increase of unconfined compressive strength, shear strength, and cohesion is significant; further, the increase of internal friction angle is small. The permeability coefficient of EICP combined with xanthan gum solidified sand decreases with the increase of xanthan gum content, and the permeability coefficient of 2% xanthan gum is only 65.4% that of pure EICP treatment. The incorporation of xanthan gum promotes the deposition of calcium carbonate, increases the viscosity of the reaction solution, and produces colloidal encapsulation and bonding effect on the sand particles. In addition, the incorporation of xanthan gum effectively reduces the porosity of solidified sand and greatly reduces the proportion of large pores and medium pores by changing the pore size, which greatly improves the pore structure.

Keyword :

Enzyme-induced carbonate precipitation (EICP) Enzyme-induced carbonate precipitation (EICP) Multiscale engineering properties Multiscale engineering properties Soybean urease Soybean urease Standard sand Standard sand Xanthan gum Xanthan gum

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GB/T 7714 Cui, Meng , Xiong, Huihui , Zheng, Junjie et al. Experimental Study on Multiscale Engineering Properties of EICP Combined with Xanthan Gum Solidified Sand [J]. | JOURNAL OF MATERIALS IN CIVIL ENGINEERING , 2024 , 36 (6) .
MLA Cui, Meng et al. "Experimental Study on Multiscale Engineering Properties of EICP Combined with Xanthan Gum Solidified Sand" . | JOURNAL OF MATERIALS IN CIVIL ENGINEERING 36 . 6 (2024) .
APA Cui, Meng , Xiong, Huihui , Zheng, Junjie , Cui, Mingjuan , Lv, Suying , Lai, Hanjiang . Experimental Study on Multiscale Engineering Properties of EICP Combined with Xanthan Gum Solidified Sand . | JOURNAL OF MATERIALS IN CIVIL ENGINEERING , 2024 , 36 (6) .
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Experimental Study on Multiscale Engineering Properties of EICP Combined with Xanthan Gum Solidified Sand Scopus
期刊论文 | 2024 , 36 (6) | Journal of Materials in Civil Engineering
Experimental Study on Multiscale Engineering Properties of EICP Combined with Xanthan Gum Solidified Sand EI
期刊论文 | 2024 , 36 (6) | Journal of Materials in Civil Engineering
Optimization of one-phase-low-pH enzyme-induced carbonate precipitation method for soil improvement SCIE
期刊论文 | 2024 , 19 (3) , 1611-1625 | ACTA GEOTECHNICA
WoS CC Cited Count: 5
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Abstract :

There are two major challenges for the use of enzyme-induced carbonate precipitation (EICP)-based soil improvement method: cost and treatment effect. Optimizing the parameters of the treatment solution is one way to enhance the treatment effect and/or reduce the treatment cost. In this study, three key factors: the initial pH (i.e. pH0) of the enzyme solution used to prepare the treatment solution (i.e. the mixture of enzyme solution, CaCl2 and urea), the urease activity of the treatment solution and the concentration of cementation solution (i.e. CaCl2 and urea) are investigated. Crude soybean enzyme solution and the one-phase-low-pH injection method are adopted for the treatment of sand. The results show that the pH0 of the enzyme solution affects the urease activity of enzyme and thus the urease activity of the prepared treatment solution. It is discovered in this paper that there is a threshold pH value for the treatment solution. Only when the pH of the treatment solution is higher than the threshold pH value, calcium ions convert completely into calcium carbonate. There is also a threshold urease activity which is affected by the concentration of cementation solution, CCS. The optimal CCS is 1.0 M. When the CCS is higher than 1.75 M, the urease activity of soybean enzyme solution would be completely lost. These findings are important in guiding the application of EICP treatment using the crude soybean enzyme in real soil improvement projects.

Keyword :

Crude soybean enzyme Crude soybean enzyme Enzyme-induced carbonate precipitation Enzyme-induced carbonate precipitation Influencing factors Influencing factors Soil improvement Soil improvement

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GB/T 7714 Cui, Ming-Juan , Chu, Jian , Lai, Han-Jiang . Optimization of one-phase-low-pH enzyme-induced carbonate precipitation method for soil improvement [J]. | ACTA GEOTECHNICA , 2024 , 19 (3) : 1611-1625 .
MLA Cui, Ming-Juan et al. "Optimization of one-phase-low-pH enzyme-induced carbonate precipitation method for soil improvement" . | ACTA GEOTECHNICA 19 . 3 (2024) : 1611-1625 .
APA Cui, Ming-Juan , Chu, Jian , Lai, Han-Jiang . Optimization of one-phase-low-pH enzyme-induced carbonate precipitation method for soil improvement . | ACTA GEOTECHNICA , 2024 , 19 (3) , 1611-1625 .
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Optimization of one-phase-low-pH enzyme-induced carbonate precipitation method for soil improvement Scopus
期刊论文 | 2024 , 19 (3) , 1611-1625 | Acta Geotechnica
Seawater-based soybean urease for calcareous sand biomineralization SCIE
期刊论文 | 2024 , 19 (10) , 6643-6659 | ACTA GEOTECHNICA
WoS CC Cited Count: 1
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Abstract :

In tropical islands, calcareous sand with poor engineering properties usually needs to be treated before it can be used as building materials. Considering the scarcity of freshwater in these areas, this study proposes seawater-based enzyme induced carbonate precipitation (EICP) technology to enhance the properties of calcareous sand. It is to induce calcium carbonate crystals to bond calcareous sand particles together using the seawater-based crude soybean enzyme and cementation solution (i.e., urea and calcium chloride). In this study, the crude soybean urease extraction test was firstly carried out using seawater and it was also investigated what components of seawater had a greater effect on the soybean urease extraction. Afterwards, the solution test was conducted to explore the ability of the extracted urease in inducing calcium carbonate through analyzing the variation of concentration of calcium ions and pH of the solution. Finally, the biocementation effect of EICP treated calcareous sand using the seawater extracted urease solution was evaluated by the unconfined compressive strength (quc) and microscopic analysis. Test results show that the turbidity of the seawater-extracted soybean urease solution can be reduced by 66.7% compared to that of deionised water extracted urease, with only a slight reduction in urease activity. Among all the components of seawater, NaCl, MgCl2, CaCl2, NaHCO3 and KBr can significantly reduce the turbidity of soybean urease solution. The lower turbidity can effectively avoid bioclogging and contribute to the homogeneity of the EICP-treated calcareous sands, and thus improve the biomineralization efficiency and strength enhancement. Seawater-based EICP treatment will be a great promising technology in freshwater-scarce tropical islands, because it can directly use seawater for biomineralization treatment of calcareous sand, and meanwhile effectively avoid local clogging of biocementation.

Keyword :

Biomineralization Biomineralization Calcareous sand Calcareous sand Enzyme induced carbonate precipitation (EICP) Enzyme induced carbonate precipitation (EICP) Seawater Seawater Soybean urease extraction Soybean urease extraction

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GB/T 7714 Cui, Ming-Juan , Zhou, Jia-Ni , Lai, Han-Jiang et al. Seawater-based soybean urease for calcareous sand biomineralization [J]. | ACTA GEOTECHNICA , 2024 , 19 (10) : 6643-6659 .
MLA Cui, Ming-Juan et al. "Seawater-based soybean urease for calcareous sand biomineralization" . | ACTA GEOTECHNICA 19 . 10 (2024) : 6643-6659 .
APA Cui, Ming-Juan , Zhou, Jia-Ni , Lai, Han-Jiang , Zheng, Jun-Jie , Huang, Ming , Zhang, Zhi-Chao . Seawater-based soybean urease for calcareous sand biomineralization . | ACTA GEOTECHNICA , 2024 , 19 (10) , 6643-6659 .
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Seawater-based soybean urease for calcareous sand biomineralization
期刊论文 | 2024 , 19 (10) , 6643-6659 | Acta Geotechnica
Seawater-based soybean urease for calcareous sand biomineralization Scopus
期刊论文 | 2024 , 19 (10) , 6643-6659 | Acta Geotechnica
Premix-spray biomineralization method for anti-disintegration improvement of granite residual soil SCIE
期刊论文 | 2024 , 20 (3) , 1251-1265 | ACTA GEOTECHNICA
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Abstract :

Granite residual soils are highly susceptible to softening and disintegration when exposed to water, extremely easy to cause geological disasters. Biomineralization can be a promising method to improve the anti-disintegration of granite residual soils. However, due to the low permeability of the soil, it may be difficult to effectively or efficiently improve the anti-disintegration of granite residual soils using conventional premix or spray methods. This study proposes a premix-spray biomineralization method to improve the anti-disintegration of granite residual soils. The bacterial suspension, bioslurry, and crude soybean urease solution were used as the urea hydrolysis media in this study. The biomineralization of granite residual soils by premix, spray, and premix-spray methods was compared based on the disintegration test and calcium carbonate content measurement. The scanning electron microscope observation, energy-dispersive X-ray spectroscopy, and X-ray diffraction were also conducted to clarify the microscopic characteristics of the biotreated granite residual soils. The test results indicate that the premix-spray method could effectively improve the anti-disintegration of granite residual soil, and the bioslurry is the optimal urea hydrolysis medium for the premix treatment. The sample prepared by premixing with bioslurry followed by 3 cycles of spray treatment could remain relatively stable with no apparent disintegration or cracking within 24 h of immersion. The underlying mechanisms for the anti-disintegration improvement of granite residual soils with biomineralization may mainly include the pore filling, encapsulating bonds between soil particles, and biocementation of adjacent soil particles by the precipitated calcium carbonate crystals.

Keyword :

Anti-disintegration Anti-disintegration Bioslurry Bioslurry Granite residual soil Granite residual soil Premix-spray biomineralization method Premix-spray biomineralization method Underlying mechanism Underlying mechanism

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GB/T 7714 Lai, Han-Jiang , Ding, Xing-Zhi , Cui, Ming-Juan et al. Premix-spray biomineralization method for anti-disintegration improvement of granite residual soil [J]. | ACTA GEOTECHNICA , 2024 , 20 (3) : 1251-1265 .
MLA Lai, Han-Jiang et al. "Premix-spray biomineralization method for anti-disintegration improvement of granite residual soil" . | ACTA GEOTECHNICA 20 . 3 (2024) : 1251-1265 .
APA Lai, Han-Jiang , Ding, Xing-Zhi , Cui, Ming-Juan , Zhou, Yan-Jun , Zheng, Jun-Jie , Chen, Zhi-Bo . Premix-spray biomineralization method for anti-disintegration improvement of granite residual soil . | ACTA GEOTECHNICA , 2024 , 20 (3) , 1251-1265 .
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Premix–spray biomineralization method for anti-disintegration improvement of granite residual soil Scopus
期刊论文 | 2025 , 20 (3) , 1251-1265 | Acta Geotechnica
Premix–spray biomineralization method for anti-disintegration improvement of granite residual soil Scopus
期刊论文 | 2024 | Acta Geotechnica
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