Biogeotechnics最新文献_第2页

Study on migration and diffusion law of MICP solution in fractured loess 碎裂黄土中 MICP 溶液的迁移和扩散规律研究

Biogeotechnics Pub Date : 2025-12-01 Epub Date: 2024-07-16 DOI: 10.1016/j.bgtech.2024.100122

Xiaojun Liu , Chaofan Pan , Lin Feng

{"title":"Study on migration and diffusion law of MICP solution in fractured loess","authors":"Xiaojun Liu , Chaofan Pan , Lin Feng","doi":"10.1016/j.bgtech.2024.100122","DOIUrl":"10.1016/j.bgtech.2024.100122","url":null,"abstract":"<div><div>In this paper, according to the migration and diffusion law of MICP solution in fracture-pore medium, the migration and diffusion equation of MICP solution in loess fracture-pore medium was derived first. Then, the migration and diffusion test was carried out by using the self-made Mdevice. In the model, the apertures of the fracture of 0.5 mm, 1.0 mm and 1.5 mm were selected, and the calcium ion concentrations at different points were measured by atomic absorption method, to obtain the distribution map of calcium ion concentration. According to the test results, the migration speed of calcium ions in the direction along the fracture is less than the diffusion speed of the wet peak, and the vertical fracture direction is faster than the diffusion speed of the wet peak. The distribution range of calcium ion concentration increases first and then decreases with the increase in fracture opening. COMSOL was used to compile the mathematical equation, and the whole process of MICP solution migration and diffusion was numerically simulated. The numerical calculation results are basically consistent with the experimental results, and the derived mathematical equation is reasonable.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 4","pages":"Article 100122"},"PeriodicalIF":0.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141841813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of humic acid on soil solidification by enzyme induced carbonate precipitation 腐植酸对酶促碳酸盐沉淀固化土壤的影响

Biogeotechnics Pub Date : 2025-12-01 Epub Date: 2024-08-12 DOI: 10.1016/j.bgtech.2024.100133

Meiqi Chen , Aoi Ichinohe , Kazunori Nakashima , Chikara Takano , Sivakumar Gowthaman , Lutfian R. Daryono , Satoru Kawasaki

{"title":"Effect of humic acid on soil solidification by enzyme induced carbonate precipitation","authors":"Meiqi Chen , Aoi Ichinohe , Kazunori Nakashima , Chikara Takano , Sivakumar Gowthaman , Lutfian R. Daryono , Satoru Kawasaki","doi":"10.1016/j.bgtech.2024.100133","DOIUrl":"10.1016/j.bgtech.2024.100133","url":null,"abstract":"<div><div>Enzyme induced carbonate precipitation (EICP) is a promising technique in the field of biocementation due to its efficiency and controllability. Although many studies have proved its reliability in different environment, little attention has been paid to the influence of humic substances on the EICP. Humic substances cover most of the surface soil across the world land with vegetation, which varies according to the density of vegetation and climate. To understand the compatibility of this technique to distinct problematic soils, it is important to figure out how humic substances could affect the carbonate precipitation process induced by urease enzyme. Therefore, this study aims to investigate the effects of humic acid (HA), one type of humic substance, on the soil solidification through EICP. For this purpose, HA was added to natural soil with varying addition amounts (0%, 1%, 2%, 4%, 8%, 16%) in soil column solidification tests. The results found that the cementation effectiveness was enhanced by a small amount of HA addition (<4%), while an addition up to 8% greatly inhibited the formation of calcium carbonate. At the same time, soil samples were buffered by HA in a weak acidic condition, thus preventing the emission of undesirable by-product ammonia in the ureolysis process. Therefore, this study makes a contribution to research on enzymatic biocementation by demonstrating the effects of HA on the cementation effectiveness of EICP technique.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 4","pages":"Article 100133"},"PeriodicalIF":0.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145229888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Announcement: Winner of the 2025 Biogeotechnics Lecture Award 公告：2025年生物岩土技术讲座奖得主

Biogeotechnics Pub Date : 2025-12-01 Epub Date: 2025-09-17 DOI: 10.1016/j.bgtech.2025.100202

引用次数: 0

Antlion sand interaction: A study of repose angle 安托利亚沙相互作用：休止角研究

Biogeotechnics Pub Date : 2025-12-01 Epub Date: 2025-09-02 DOI: 10.1016/j.bgtech.2024.100142

Ali Maroof

引用次数: 0

Polymer-assisted soybean crude urease carbonate precipitation technique for soil improvement 聚合物辅助大豆粗脲酶碳酸酯沉淀改良土壤技术

Biogeotechnics Pub Date : 2025-12-01 Epub Date: 2024-11-17 DOI: 10.1016/j.bgtech.2024.100147

Zalfa Maulida Ihsani , Naoki Kinoshita , Hideaki Yasuhara , Heriansyah Putra

{"title":"Polymer-assisted soybean crude urease carbonate precipitation technique for soil improvement","authors":"Zalfa Maulida Ihsani , Naoki Kinoshita , Hideaki Yasuhara , Heriansyah Putra","doi":"10.1016/j.bgtech.2024.100147","DOIUrl":"10.1016/j.bgtech.2024.100147","url":null,"abstract":"<div><div>This study presents a sustainable approach to soil improvement by integrating polyvinyl alcohol (PVA) into the Soybean Crude Urease Carbonate Precipitation (SCU-CP) technique. The research aims to enhance SCU-CP, which utilizes soybean-derived urease to precipitate calcium carbonate, bonding soil particles and increasing strength. Challenges such as low solution viscosity and inconsistent carbonate precipitation are addressed by incorporating PVA, a biodegradable polymer that improves viscosity and retention. Comprehensive evaluations reveal significant findings: increasing PVA concentration enhances solution viscosity and results in higher calcium carbonate precipitation. Water retention assessments show that the PCP-1% treatment increases saturation water content (<em>w</em><sub><em>s</em></sub>) to 0.263 compared to 0.217 for untreated soil, while also reduces the air-entry value (α). Unconfined Compressive Strength (UCS) tests indicate substantial improvement for PCP-1%, achieving approximately 140 kPa, with values reaching 179 kPa after 28 days. Calcium carbonate content measurements reveal that SCU-CP exhibits a variable distribution (standard deviation of 1.13), while PCP-1% demonstrates a more uniform distribution (standard deviation of 0.60), indicating improved effectiveness. Durability assessments through wet-dry cycling show that SCU-CP experiences a mass loss of 36.5%, while PCP-1% retains only 5% mass loss and maintains a UCS values. SEM images indicate that SCU-CP forms spherical structures, whereas PCP-1% produces a more diverse and crystalline morphology, suggesting better nucleation and distribution. Overall, the polymer-assisted SCU-CP technique (PCP) demonstrates significant potential for effective soil improvement.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 4","pages":"Article 100147"},"PeriodicalIF":0.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145229887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bio-molding of lunar regolith with bio-carbonized magnesium oxide 生物碳化氧化镁在月球风化层中的生物成型

Biogeotechnics Pub Date : 2025-12-01 Epub Date: 2024-12-20 DOI: 10.1016/j.bgtech.2024.100159

Jinquan Shi, Zihao Xiao, Yang Xiao, Hanlong Liu

{"title":"Bio-molding of lunar regolith with bio-carbonized magnesium oxide","authors":"Jinquan Shi, Zihao Xiao, Yang Xiao, Hanlong Liu","doi":"10.1016/j.bgtech.2024.100159","DOIUrl":"10.1016/j.bgtech.2024.100159","url":null,"abstract":"<div><div>As lunar exploration develops, lunar construction is increasingly prominent and the in-situ lunar regolith molding becomes a technical challenge. This study proposes a lunar regolith molding technology based on biocarbonated magnesium oxide (MgO) with urea pre-hydrolyzed, which has the potential to achieve an unconfined compressive strength (UCS) of approximately 10 MPa after 24 h of curing. The study investigates the physical and mechanical properties of biocarbonated lunar regolith samples with varying urea concentrations, bacterial concentrations, and MgO contents. Scanning electron microscopy (SEM) was employed to examine the microstructural properties of the samples. The results demonstrated that the maximum UCS and E<sub>50</sub> were achieved at a urea concentration of 1.0 mol/L, a bacterial concentration of 1.0, and a MgO content of 15%. However, the carbonate content test indicated that the highest urea efficiency was observed at 10% MgO. Microscopic images show that the produced hydromagnesite is the most structured at the urea concentrations of 1.0 mol/L and 2.0 mol/L, corresponding well with the strength performance of the specimens. The pre-hydrolysis method can promote the efficiency of biocarbonated magnesium oxide but it highly depends on the concentration of the produced carbonate. Conclusively, the findings of this study offer a promising avenue for lunar regolith molding.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 4","pages":"Article 100159"},"PeriodicalIF":0.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145229889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Discrete element simulations to predict the response of bio-cemented sands 离散元件模拟预测生物加固砂的反应

Biogeotechnics Pub Date : 2025-12-01 Epub Date: 2024-06-13 DOI: 10.1016/j.bgtech.2024.100119

Pu Yang , Edward Kavazanjian , Narayanan Neithalath

{"title":"Discrete element simulations to predict the response of bio-cemented sands","authors":"Pu Yang , Edward Kavazanjian , Narayanan Neithalath","doi":"10.1016/j.bgtech.2024.100119","DOIUrl":"10.1016/j.bgtech.2024.100119","url":null,"abstract":"<div><div>Discrete element method (DEM)-based numerical models in the YADE environment are used to simulate the constitutive response of uncemented and bio-cemented sands to investigate the influence of boundary conditions, loading and testing conditions, and material types. Both the classical DEM model and the pore scale finite volume (PFV)-coupled DEM model are used to simulate the response of saturated uncemented and lightly cemented sands with a rigid wall boundary under both drained and undrained triaxial compression. A DEM model with flexible boundaries created using particle facet (PFacet) elements is used to simulate undrained triaxial compression of moderately cemented sands, including the influence of confining stress. The PFacet-based model is used to predict the transition from barreling failure to shear banding when the confining stress or the cementation degree increases. The classical DEM model with cohesive bonds of uniform strength is also used to successfully simulate the uniaxial compression response of a sand with an extremely high degree of cementation. Finally, this paper presents a particle-packing model consisting of multiple solid phases for cemented sands based on the understanding that not all particle types will have the same cohesive properties. This multiple solid-phase model is a refinement of the classical DEM model that represents the particle physics more realistically, especially for heterogeneous systems. A preliminary parametric study is carried out considering varying cohesive properties and volume fractions for the different solid phases.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 4","pages":"Article 100119"},"PeriodicalIF":0.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141415304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of sticky rice on the strength and permeability of bio-cemented sand 糯米对生物胶结砂强度和渗透性的影响

Biogeotechnics Pub Date : 2025-09-01 Epub Date: 2024-09-30 DOI: 10.1016/j.bgtech.2024.100141

Qiyong Zhang , Jian Chu , Zheng Zhang , Wenhao Wang , Shifan Wu

{"title":"Effect of sticky rice on the strength and permeability of bio-cemented sand","authors":"Qiyong Zhang , Jian Chu , Zheng Zhang , Wenhao Wang , Shifan Wu","doi":"10.1016/j.bgtech.2024.100141","DOIUrl":"10.1016/j.bgtech.2024.100141","url":null,"abstract":"<div><div>Microbially induced carbonate precipitation (MICP) is an eco-friendly soil improvement technique. However, this method still has some drawbacks, such as low conversion efficiency of CaCO<sub>3</sub> crystallization, insufficient strength for certain applications, and requiring multiple treatments. Previous studies have reported that sticky rice can regulate CaCO<sub>3</sub> crystals (i.e., chemical CaCO<sub>3</sub>) in the sticky rice-lime mortar, showing potential for improving the bio-cementation. Therefore, this study explored the possibility of using sticky rice to enhance the biocementation effect. Tests were carried out to assess the strength and permeability of bio-cemented sand with the inclusion of sticky rice. The results indicated that sticky rice may regulate the type and size of bio-CaCO<sub>3</sub> crystals, and the use of an appropriate amount of sticky rice as additive could increase the strength of sand columns by regulating CaCO<sub>3</sub> crystallization. Polyhedral calcites may be more favourable for the increasing strength than some vaterites with a hollow spherical structure. The combination of MICP and sticky rice can significantly decrease the coefficient of permeability to a value that was much lower than that by using sticky rice and MICP alone. Bio-CaCO<sub>3</sub> immobilized the sticky rice on one end on sand particles, and the reticulated structure of sticky rice divided large pores into small pores, which may be the important cause of the decrease in permeability coefficient. Finally, this study proposed that the MICP with the sticky rice as an additive may enhance the MICP effect and prevent the surface erosion of coarse-grained sand slopes.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 3","pages":"Article 100141"},"PeriodicalIF":0.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144563188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparison of the efficiency of traditional MICP and two-step MICP method for immobilizing heavy metals in aquatic environments 传统MICP法与两步MICP法固定化水中重金属的效果比较

Biogeotechnics Pub Date : 2025-09-01 Epub Date: 2024-05-25 DOI: 10.1016/j.bgtech.2024.100106

Xiaosong Huang , Rongjun Zhang , Junjie Zheng

{"title":"Comparison of the efficiency of traditional MICP and two-step MICP method for immobilizing heavy metals in aquatic environments","authors":"Xiaosong Huang , Rongjun Zhang , Junjie Zheng","doi":"10.1016/j.bgtech.2024.100106","DOIUrl":"10.1016/j.bgtech.2024.100106","url":null,"abstract":"<div><div>The application of the microbially induced carbonate precipitation (MICP) method for remediating heavy metals (i.e., HMs) has recently garnered significant attention. Nevertheless, the inhibition of urease activity by toxic Cd<sup>2+</sup>, Pb<sup>2+</sup>, Zn<sup>2+</sup>, and Cu<sup>2+</sup> poses a challenge for MICP-based remediation of HMs contamination. This study: (1) first performed the traditional MICP tests (in which the bacterial solution, urea solution, and HMs were mixed simultaneously), and investigated the toxic effect of HMs on the urease activity and the immobilization efficiency, (2) analyzed the toxicity and immobilization mechanism during the MICP process by combining the simulation and XRD tests, (3) conducted the two-step MICP tests (which initially mixed the bacterial solution and urea solution to promote urea hydrolysis, then added the HMs solutions for HMs precipitation) to improve the immobilization efficiency. The tube experiments and simulations were investigated in the HMs concentration range from 1 to 10 mmol/L. Indicators including ammonium concentration, HMs concentrations, and pH were measured/recorded during the tests. The results show that soluble HMs exhibit a concentration-dependent inhibition of urea hydrolysis during the traditional MICP process, resulting in a decreasing immobilization efficiency. The two-step MICP method can effectively immobilize almost the Cd<sup>2+</sup> and Zn<sup>2+</sup> when the initial urea hydrolysis period exceeds 1–2 h. In addition, a high immobilization rate of over 90% can be achieved for Cu-contaminated solutions at the optimal first-step reaction time. Compared with the traditional MICP procedure, the effective two-step MICP method exhibits more promising application prospects for the immobilization of soluble HMs in aquatic environments.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 3","pages":"Article 100106"},"PeriodicalIF":0.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144563897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Progress and prospect of biomimetic optical materials: A review 仿生光学材料的研究进展与展望

Biogeotechnics Pub Date : 2025-09-01 Epub Date: 2025-02-22 DOI: 10.1016/j.bgtech.2025.100167

Dashuang Wang , Tuo Ping , Zhilan Du , Tingye Liu , Yuxin Zhang

{"title":"Progress and prospect of biomimetic optical materials: A review","authors":"Dashuang Wang , Tuo Ping , Zhilan Du , Tingye Liu , Yuxin Zhang","doi":"10.1016/j.bgtech.2025.100167","DOIUrl":"10.1016/j.bgtech.2025.100167","url":null,"abstract":"<div><div>Recent advances in bionic optical materials (BOMs) are systematically reviewed, emphasizing bioinspired strategies derived from natural models such as plant epidermis, aquatic organisms, avian plumage, and insect photonic architectures (e.g., butterfly wings and inverse opal structures). These biological systems exhibit sophisticated light manipulation mechanisms, including absorption, scattering, and structural coloration, which have guided the design of novel extinction materials with tunable optical properties. By mimicking hierarchical structures and dynamic light-regulation principles, researchers have developed BOMs exhibiting exceptional broadband extinction performance. Notably, applications in optical sensing and imaging systems are critically discussed, highlighting their role in enhancing camera sensitivity and adaptive optical sensor design. Furthermore, this review identifies emerging trends in nanofabrication, machine learning-assisted optimization, and biohybrid material systems. The integration of cross-disciplinary approaches is projected to accelerate the development of multifunctional BOMs, paving the way for breakthroughs in adaptive optics, environmental monitoring, and intelligent photonic devices. In the future, the integration of BOMs and distributed fiber optic sensing technology is expected to realize the whole-life optical monitoring of pile foundation structural health, and promote the development of geotechnical engineering in the direction of intelligence and high precision.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 3","pages":"Article 100167"},"PeriodicalIF":0.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144557689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0