BiogeotechnicsPub Date : 2025-03-19DOI: 10.1016/j.bgtech.2025.100177
{"title":"Erratum regarding updating Declaration of Competing Interest statements in previously published articles","authors":"","doi":"10.1016/j.bgtech.2025.100177","DOIUrl":"10.1016/j.bgtech.2025.100177","url":null,"abstract":"","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 2","pages":"Article 100177"},"PeriodicalIF":0.0,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
BiogeotechnicsPub Date : 2025-02-22DOI: 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":"2025-02-22","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}
BiogeotechnicsPub Date : 2025-01-26DOI: 10.1016/j.bgtech.2025.100164
Yaoting Duan , Qin Yuan , Caiqi Yu , Chunli Zheng
{"title":"A large-scale study on solidification of gold tailings based on microbially induced carbonate precipitation (MICP)","authors":"Yaoting Duan , Qin Yuan , Caiqi Yu , Chunli Zheng","doi":"10.1016/j.bgtech.2025.100164","DOIUrl":"10.1016/j.bgtech.2025.100164","url":null,"abstract":"<div><div>One of the major challenges in the application of microbially induced carbonate precipitation (MICP) is achieving \"bacteria freedom\", as it necessitates a substantial volume of bacterial solutions. Nevertheless, both in-situ bacterial cultivation and transportation of bacterial solutions have proven to be inefficient. In this study, we suggested the utilization of bacteria in the form of dry powder, enabling easy on-site activation and achieving a relatively high urease activity. We conducted MICP curing experiments on gold mine tailings (GMT) using steel slag (SS) as an additive. The results showed that the average unconfined compressive strength (UCS) values of the tailings treated with MICP and MICP+SS reached 0.51 and 0.71 MPa, respectively. In addition, the average leaching reduction rates of Cu, Pb, Cr, Zn, and T-CN in GMT after MICP treatment reached 98.54%, 100%, 70.94%, 59.25%, and 98.02%, respectively, and the average reduction rates after MICP+SS treatment reached 98.77%, 100%, 88.03%, 72.59%, and 98.63%, respectively. SEM, XRD, FT-IR analyses, and ultra-deep field microscopy results confirmed that the MICP treatment produced calcite-based calcium carbonate that filled the inter-tailing pores and cemented them together, and the hydration mechanism was the main reason for the increased curing efficiency of SS. Our research findings demonstrate that bacterial powder can efficiently achieve the objectives of heavy metal removal and tailing solidification. This approach can substantially decrease the expenses associated with bacterial cultivation and solution transportation, thereby playing a crucial role in advancing the practical implementation of MICP.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 3","pages":"Article 100164"},"PeriodicalIF":0.0,"publicationDate":"2025-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144557688","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}
BiogeotechnicsPub Date : 2024-12-20DOI: 10.1016/j.bgtech.2024.100160
Yang Zhao , Zheng Lu , Abdollah Tabaroei , Chuxuan Tang , Yinuo Feng , Hailin Yao
{"title":"Advanced bioinspired cellular confinement systems for improving the performance of reinforced soil beds","authors":"Yang Zhao , Zheng Lu , Abdollah Tabaroei , Chuxuan Tang , Yinuo Feng , Hailin Yao","doi":"10.1016/j.bgtech.2024.100160","DOIUrl":"10.1016/j.bgtech.2024.100160","url":null,"abstract":"<div><div>With the major developments that occurred during the past 40 years in the geotechnical engineering field, the usage of reinforcements in soils has been very common to improve the ultimate bearing capacity and reduce the footing settlements. These reinforcements consist of geogrids, geotextiles, geocells, etc., all of which are in the geosynthetic family. Among these geosynthetic families, geocell performs better in soil-reinforced beds. In this study, we proposed the nine types of bioinspired geocells to improve the soil beds. For this purpose, a total of twenty numerical models were calculated via FLAC<sup>3D</sup> after validating the laboratory model tests in the literature. The numerical results demonstrated that, except for the circular type, the performance of other geocell forms regarding increased bearing capacity was nearly identical. Regarding diffusion angles, only the circular and honeycomb geocells exhibited larger diffusion angles. The opening pocket diameter more significantly influenced the stress and strain of geocells. Geocells with nearly circular shapes, such as circular, honeycomb, hexagonal, and square, typically demonstrated higher confining stresses within the geocell walls. Conversely, for shapes that deviate from the circular form, such as diamond, re-entrant, and double V-shaped designs, the irregularity of the pocket shape could cause an uneven distribution of confining stresses, potentially leading to higher normal deformations at some specific areas and stress concentration at the wall joints.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 3","pages":"Article 100160"},"PeriodicalIF":0.0,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144557604","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}
{"title":"High-temporal-resolution ERT characterization for vegetation effects on soil hydrological response under wet-dry cycles","authors":"Wei Yan , Weiming Xu , Taosheng Huang , Ping Shen , Wan-Huan Zhou","doi":"10.1016/j.bgtech.2024.100155","DOIUrl":"10.1016/j.bgtech.2024.100155","url":null,"abstract":"<div><div>Characterization of vegetation effect on soil response is essential for comprehending site-specific hydrological processes. Traditional research often relies on sensors or remote sensing data to examine the hydrological properties of vegetation zones, yet these methods are limited by either measurement sparsity or spatial inaccuracy. Therefore, this paper is the first to propose a data-driven approach that incorporates high-temporal-resolution electrical resistivity tomography (ERT) to quantify soil hydrological response. Time-lapse ERT is deployed on a vegetated slope site in Foshan, China, during a discontinuous rainfall induced by Typhoon Haikui. A total of 97 ERT measurements were collected with an average time interval of 2.7 hours. The Gaussian Mixture Model (GMM) is applied to quantify the level of response and objectively classify impact zones based on features extracted directly from the ERT data. The resistivity-moisture content correlation is established based on on-site sensor data to characterize infiltration and evapotranspiration across wet-dry conditions. The findings are compared with the Normalized Difference Vegetation Index (NDVI), a common indicator for vegetation quantification, to reveal potential spatial errors in remote sensing data. In addition, this study provides discussions on the potential applications and future directions. This paper showcases significant spatio-temporal advantages over existing studies, providing a more detailed and accurate characterization of superficial soil hydrological response.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 2","pages":"Article 100155"},"PeriodicalIF":0.0,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
BiogeotechnicsPub Date : 2024-11-22DOI: 10.1016/j.bgtech.2024.100154
Yaru Lv , Lin Wu , Zhigang Duan , Yuchen Su , Dongdong Zhang
{"title":"Impact behavior and strain rate effects of artificial limestone by MICP","authors":"Yaru Lv , Lin Wu , Zhigang Duan , Yuchen Su , Dongdong Zhang","doi":"10.1016/j.bgtech.2024.100154","DOIUrl":"10.1016/j.bgtech.2024.100154","url":null,"abstract":"<div><div>Natural cemented calcareous sand and limestone are highly complex and not well understood in terms of the mechanical behavior due to the difficulty of obtaining undisturbed samples from far sea. This paper proposes an artificial method in a laboratory setting using microbial-induced carbonate precipitation (MICP) to simulate the natural process of cementation of limestone. The artificially cemented sand has a high degree of similarity with the natural weakly limestone in three aspects: (1) the mineral composition of the cemented material is also granular calcite and acicular aragonite; (2) the microstructure in interconnected open pore network can be gradually closed and contracted with cementation. The porosity reaches to approximately 9.2%; (3) both the stress-strain relationship and the unconfined strength closely resemble that of natural weakly limestone. Furthermore, both static and dynamic behaviors of artificial limestone were studied by quasi-static compression tests and Split Hopkinson Pressure Bar (SHPB) tests, finding that the unconfined strength of weakly artifical limestone exponentially increases with increasing strain rate. A rate-dependent bond strength was proposed and implemented in software to reveal the mechanism of strain rate effects. It is found that the loading velocity is too high to keep in sync with the initiation and propagation of cracks under impact loading. This delay-induced viscosity may restrict the movement of the surrounding balls, thus increasing resistance.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 2","pages":"Article 100154"},"PeriodicalIF":0.0,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
BiogeotechnicsPub Date : 2024-11-03DOI: 10.1016/j.bgtech.2024.100137
Emmanuel Salifu , Giuseppe Di Rauso Simeone , Giacomo Russo , Maria A. Rao , Gianfranco Urciuoli , Grainne El Mountassir
{"title":"Influence of environmental conditions on the growth of Pleurotus ostreatus in sand","authors":"Emmanuel Salifu , Giuseppe Di Rauso Simeone , Giacomo Russo , Maria A. Rao , Gianfranco Urciuoli , Grainne El Mountassir","doi":"10.1016/j.bgtech.2024.100137","DOIUrl":"10.1016/j.bgtech.2024.100137","url":null,"abstract":"<div><div><em>Pleurotus ostreatus,</em> a saprotrophic fungus, has been proposed for the remediation of organic contaminants in soils and more recently for modifying the hydraulic and mechanical behaviour of granular soils. The in situ performance of fungal-based biotechnologies will be controlled by the fungal growth and associated biochemical activity that can be achieved in soil. In this study, the influence of environmental conditions (temperature, degree of saturation), substrate type (lignocellulose and spent coffee grounds) and concentration on the mycelium growth of <em>P. ostreatus</em> in sand are investigated. Furthermore, the evolution of growth/survival indicators (respiration, ergosterol concentration) and enzymatic activity (laccase, manganese peroxidase) are investigated. Temperature was shown to have a strong influence on the growth of <em>P.ostreatus</em> in sand: growth was observed to be delayed at low temperatures (e.g. 5 °C), whereas growth was prevented at high temperatures (e.g. 35 °C). No growth was observed at very low degrees of saturation (<em>S</em><sub><em>r</em></sub><em>=</em>0% and 1.2%), indicating there is a critical water content required to support <em>P.ostreatus</em> growth. Within the mid-range of water contents tested radially, growth of <em>P.</em>ostreatus was similar. However, growth under saturated soil conditions was restricted to the air-water atmosphere due to the requirement for oxygen availability. Low substrate concentrations (1%–5%) resulted in high radial growth of <em>P.ostreatus</em>, whereas increasing substrate content further acted to reduce radial growth, but visual observations indicated that fungal biomass density increased. These results are important for understanding the feasibility of <em>P.ostreatus</em> growth under specific site conditions and for the design of successful treatment strategies.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 2","pages":"Article 100137"},"PeriodicalIF":0.0,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
BiogeotechnicsPub Date : 2024-10-25DOI: 10.1016/j.bgtech.2024.100146
Yunlong Liu , Yanyan Xia , Mudassir Mehmood , Lei Wang , Wen Nie , Yingao Zhao , Zhencai Luo
{"title":"Soil-water retention capacity of expansive soil improved through enzyme induced carbonate precipitation-eggshell powder","authors":"Yunlong Liu , Yanyan Xia , Mudassir Mehmood , Lei Wang , Wen Nie , Yingao Zhao , Zhencai Luo","doi":"10.1016/j.bgtech.2024.100146","DOIUrl":"10.1016/j.bgtech.2024.100146","url":null,"abstract":"<div><div>Enzyme Induced Carbonate Precipitation (EICP) has been extensively investigated as a promising approach to improve engineering properties of soil, while Eggshell Powder (ESP) is an agricultural waste that effectively fills soil pores. The ESP provides abundant nucleation at sites for the EICP process, further promoting the effective precipitation of calcium carbonate. The research presented in this paper investigated the Soil Water Characteristic Curves (SWCC), permeability coefficient, and microstructure of expansive soil before and after EICP and EICP+ESP modification. A series of laboratory experiments were conducted, including soil water characteristic tests, permeability tests and Scanning Electron Microscopy (SEM). The results proved that the addition of EICP and EICP+ESP into natural expansive soil resulted in a gradual decline in air entry value, residual water content, and permeability coefficient, indicating an increase in water retention capacity and a decrease in permeability. Furthermore, with the intrusion of EICP and EICP+ESP, the contact between particles becomes smoother, and the soil pores become more equally distributed. Ultimately, there was an enhancement in water retention capacity of the natural expansive soil. This study emphasizes the synergistic potential of combining EICP and EICP+ESP as stabilizing additives to enhance the water retention capacity of expansive soil. Moreover, the reuse of ESP provides a sustainable solution for the resource utilization of agricultural waste and the improvement of expansive soil using bio-inspired methods.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 3","pages":"Article 100146"},"PeriodicalIF":0.0,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144557488","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}
BiogeotechnicsPub Date : 2024-10-22DOI: 10.1016/j.bgtech.2024.100131
Kemeng Yu, Yuling Ran, Jie Shi, Menglan Duan, Zhongkun Ouyang
{"title":"Physical property of MICP-treated calcareous sand under seawater conditions by CPTU","authors":"Kemeng Yu, Yuling Ran, Jie Shi, Menglan Duan, Zhongkun Ouyang","doi":"10.1016/j.bgtech.2024.100131","DOIUrl":"10.1016/j.bgtech.2024.100131","url":null,"abstract":"<div><div>MICP (Microbially induced calcite precipitation), an environmentally friendly soil improvement technique, has great potential in ocean engineering due to its ability to promote the precipitation of calcium carbonate through microbial activity to enhance the engineering properties of geomaterials. In this study, piezocone penetration test (CPTU) is used to evaluate the effectiveness of MICP treatment in calcareous sand. The change of physical properties (relative density <em>D</em><sub>r</sub> and total unit weight <em>γ</em><sub>t</sub>) of MICP treated calcareous sand is investigated by conducting CPTU on the geomaterials prepared in a series of mini calibration chambers (25 cm × 50 cm). Results indicate that CPTU (tip stress, sleeve friction, and porewater pressure) measurements can be used to interpret the physical characteristics of calcareous sand treated with MICP under seawater conditions. Additionally, a relationship between CPTU measurements, physical parameters (relative density <em>D</em><sub>r</sub> and total unit weight <em>γ</em><sub>t</sub>) of MICP treated calcareous sand is proposed and calibrated. The findings of the research extend the implementation of in-situ testing techniques such as CPTU towards physical property evaluation of bio-treated geomaterials in ocean environment, and demonstrate the potential of scaling up MICP techniques for broader engineering application.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 1","pages":"Article 100131"},"PeriodicalIF":0.0,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142722192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"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":"2024-09-30","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}