Biogeotechnics最新文献

{"title":"Erosion resistance of treated dust soils based on the combined enzymatically induced carbonate precipitation and polyacrylic acid","authors":"Hengxing Wang ,&nbsp;Junjie Wang ,&nbsp;Xiaohao Sun ,&nbsp;Linchang Miao ,&nbsp;Wenbo Shi ,&nbsp;Linyu WU ,&nbsp;Junhao Yuan","doi":"10.1016/j.bgtech.2023.100050","DOIUrl":"10.1016/j.bgtech.2023.100050","url":null,"abstract":"<div><p>The majority of cities worldwide are grappling with the challenge of dust pollution. Recently, the application potential of enzymatically induced carbonate precipitation (EICP), a novel environmentally friendly method, for dust control has been convincingly demonstrated. However, the long-term durability of EICP treatment is consistently a significant concern, particularly in regions prone to recurrent erosion caused by rainfall. As a result, the erosion durability of the EICP-treated dust soils requires further investigation. To address this, Polyacrylic acid (PAA) was added to the cementation solution in this study as the combined PAA and EICP treatment for dust control. The results showed that the addition of PAA slightly affected urea degradation; however, the combined PAA and EICP treatment significantly improved surface strength from 300 kPa to 500 kPa, especially for the wind-erosion resistance compared with the EICP treatment alone. The surface strength of samples treated with the combined PAA and EICP still exhibited a decrease due to repeated rainfall erosion, along with a reduction in calcium carbonate (CaCO₃) contents. Nevertheless, the decreasing slopes of surface strength (k = 13.434, 14.002, or 14.186) in response to repeated rainfall for EICP-PAA-treated slopes were much smaller than those for EICP-treated samples (k = 14.271), as well as the decreasing slopes of CaCO₃ contents, which suggested the slopes with the combined treatment had significantly improved durability. By comparing the cementation effect and the influence of repeated rainfalls on treated dust samples, the EICP-PAA (50 g/L) treatment achieved better dust control effects. Overall, the combined treatment of EICP-PAA shows promising potential for effectively suppressing dust generation and enhancing erosion durability.</p></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"1 4","pages":"Article 100050"},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949929123000505/pdfft?md5=26ab81ea9639acffd416bb2dc9797b3a&pid=1-s2.0-S2949929123000505-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135965852","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":"Microbial mineralization: A promising approach for stone cultural relics restoration","authors":"Huanran Wu,&nbsp;Jinquan Shi,&nbsp;Yang Xiao,&nbsp;Jieling He,&nbsp;Jian Chu","doi":"10.1016/j.bgtech.2023.100053","DOIUrl":"10.1016/j.bgtech.2023.100053","url":null,"abstract":"","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"1 4","pages":"Article 100053"},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949929123000530/pdfft?md5=8f51e66b10e1e32e7de77730fb2b5230&pid=1-s2.0-S2949929123000530-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136128413","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":"Influence of biochar on soil air permeability and greenhouse gas emissions in vegetated soil: A review","authors":"Yuchen Wang ,&nbsp;Jiayu Gu ,&nbsp;Junjun Ni","doi":"10.1016/j.bgtech.2023.100040","DOIUrl":"10.1016/j.bgtech.2023.100040","url":null,"abstract":"<div><p>The increasing emission of greenhouse gases such as CO₂, CH₄, and N₂O from the soil has become a growing concern globally. To address this issue, biochar has emerged as an environmentally friendly soil amendment that can affect the gas permeability of soil and reduce greenhouse gas emissions. The biochar-soil-plant system exhibits a complicated interaction that promotes plant productivity and root elongation, further impacting greenhouse gas emissions. The objective of this paper is to provide a comprehensive review of the effects of biochar on soil gas permeability and consequently greenhouse gas emission in vegetated soil. The paper begins by discussing the basic characteristics of biochar and its impact on soil microstructure. It then explores the impact of biochar on the gas permeability of both non-vegetated and vegetated soil. The mechanisms through which biochar influences greenhouse gas emission are explained in terms of modified soil aeration, water holding capacity, adsorption, pH, available nutrients, and the activity of soil microbes and enzymes. The role of plants in greenhouse gas emission in biochar-amended soil is also analysed by comparing the vegetated group with the non-vegetation group. The paper includes a discussion of the various methods used to measure soil gas permeability, such as the steady-state and transient methods, as well as greenhouse gas emission measurement techniques, such as the chamber system and micrometeorological methods. Finally, future research directions are proposed to highlight the impact and corresponding mechanisms of plant roots on the biochar-induced variation of soil gas permeability and greenhouse gas emission.</p></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"1 4","pages":"Article 100040"},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949929123000402/pdfft?md5=c2aa772819c633b77de8917f0813e100&pid=1-s2.0-S2949929123000402-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135248561","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":"Mechanisms and influencing factors of biomineralization based heavy metal remediation: A review","authors":"Hanjiang Lai ,&nbsp;Xingzhi Ding ,&nbsp;Mingjuan Cui ,&nbsp;Junjie Zheng ,&nbsp;Zhibo Chen ,&nbsp;Jialong Pei ,&nbsp;Jianwei Zhang","doi":"10.1016/j.bgtech.2023.100039","DOIUrl":"https://doi.org/10.1016/j.bgtech.2023.100039","url":null,"abstract":"<div><p>Heavy metal contamination of soil and water is one of the most prominent environmental issues worldwide. Through bioaccumulation and biomagnification of the food chain, heavy metals can be enriched hundreds of times and eventually enter the human body, posing a major threat to human health. Biomineralization has the greatest potential to become an efficient and environmentally friendly heavy metal remediation technology and has received much attention in recent decades. This review summarizes the latest progress of biomineralization technology on carbonate precipitation and phosphate precipitation in heavy metal remediation. Both microorganisms (including bacteria and fungi) and enzymes can induce carbonate and phosphate precipitation, converting the free heavy metal ions into insoluble salts. However, the mechanisms of the heavy metal remediation are significantly different. For example, urea hydrolysis, which occurs intracellularly when urease-producing bacteria (UPB) are used, is the most commonly used mechanism for carbonate precipitation based bioremediation. In contrast, phosphate solubilization by either enzymes or organic acids secreted by phosphate solubilizing bacteria (PSB) is extracellular, and both soluble and insoluble phosphorus can be decomposed by PSB. Moreover, some influencing factors such as the different species of microorganism, heavy metals and some environmental conditions that may affect the bioremediation of heavy metals were also summarized in this paper. The challenges of biomineralization based heavy metal remediation are also discussed. Based on the reviews of previous studies, a comprehensive understanding of heavy metal removal through microorganism can be increased, and thus promotes the applications of biomineralization technology in the treatment of large-scale heavy metal contaminated sites.</p></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"1 3","pages":"Article 100039"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49710388","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":"Synthesis and application of biomimetic material inspired by diatomite","authors":"Kailin Li ,&nbsp;Xiaoying Liu ,&nbsp;Yuxin Zhang","doi":"10.1016/j.bgtech.2023.100037","DOIUrl":"https://doi.org/10.1016/j.bgtech.2023.100037","url":null,"abstract":"<div><p>Inspired by nature, the design and synthesis of novel biomimetic materials are gradually attracting the attention of scientists. Biomimetic materials with excellent performance are widely applied in medical health, industrial production, agricultural planting, aerospace, etc. As a natural porous biomass material, diatomite has the advantages of high porosity, low bulk density, stable chemical property and large surface area. Benefiting from these advantages, it is of great importance to treat diatomite as bionic substrate to synthesize diatomite biomimetic materials, which can be endowed good structure stability and natural mechanical property. It is an ideal option for crystal growth and uniform dispersion of nanostructures, to improve the agglomeration and high cost of nanomaterials. This review briefly introduces our recent achievements on diatomite biomimetic materials in different application fields. In view of its excellent optical, thermal, chemical and mechanical property, diatomite biomimetic materials have shown extensive application potential in various fields of science and engineering, which include catalysis, corrosion protection, microwave adsorption, super-hydrophobicity, pollutant adsorption, energy storage, etc. It demonstrates that diatomite biomimetic materials with different functional properties can be synthesized by diverse chemical means and preparation methods for different application. By composed of inorganic nanomaterial hybrid, this diatomite biomimetic materials display a three-dimensional network structure with diatomite morphology. The design and synthesis of diatomite biomimetic materials provide more potential bionic categories for different applications, which can accelerate the development of low-cost and high-performance biomimetic materials.</p></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"1 3","pages":"Article 100037"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49710558","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":"Experimental study on permeability and strength characteristics of MICP-treated calcareous sand","authors":"Yumin Chen ,&nbsp;Yi Han ,&nbsp;Xinlei Zhang ,&nbsp;Saeed Sarajpoor ,&nbsp;Shuhang Zhang ,&nbsp;Xiaofei Yao","doi":"10.1016/j.bgtech.2023.100034","DOIUrl":"https://doi.org/10.1016/j.bgtech.2023.100034","url":null,"abstract":"<div><p>Calcareous sand is the main fill material for island reclamation projects, but untreated calcareous sand might not be used as a reclamation fill due to its poor mechanical properties. Microbial induced calcite precipitation (MICP) was directly used to consolidate calcareous sands. One-dimensional sand column tests were conducted to identify the optimized solutions and to investigate the effects of cement solution concentration, relative density, and consolidation frequencies on the permeability and mechanical properties of MICP-treated calcareous sands. Finally, three-dimensional model tests were carried out to investigate the effective consolidation range of microbially treated calcareous sands. The results show that the MICP-treated calcareous sand shows a reduction in the permeability of the sample, while the calcium carbonate cementation and its filling effect improves the mechanical properties of the soil. The one-dimentional test results show that the effective values for cement solution concentration, relative density, and consolidation frequencies range from 0.5 mol/L to 1.5 mol/L, 30%–70%, and 5–15 times. The consolidation frequencies have the greatest influence on the permeability and strength properties of the treated calcareous sand. A quadratic polynomial regression model for permeability and strength was established through response surface analysis, and the regression model proved to be highly accurate and reliable through testing. In three-dimentional tests, the consolidation range tends to move downwards in a trapezoidal shape, showing a \"big bottom and small top\" pattern, with a consolidation range of approximately 34 times the diameter of the pipe. This study serves as a reference for selecting consolidation parameters for subsequent tests and applications of MICP-treated calcareous sands.</p></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"1 3","pages":"Article 100034"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49710556","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":"A review of bio-inspired geotechnics-perspectives from geomaterials, geo-components, and drilling & excavation strategies","authors":"Wengang Zhang ,&nbsp;Jiaying Xiang ,&nbsp;Ruijie Huang ,&nbsp;Hanlong Liu","doi":"10.1016/j.bgtech.2023.100025","DOIUrl":"https://doi.org/10.1016/j.bgtech.2023.100025","url":null,"abstract":"<div><p>As urbanization progresses, the demand for high-rise buildings and underground spaces is growing, and the need for firm geotechnical construction materials, efficient excavation methods, accurate testing instruments, and innovative geotechnical engineering theories and technologies is increasing. By investigating the phenomena of strengthening and toughening in nature, hydrophobic and ice-phobic, friction anisotropy and drilling as well as excavation, etc, researchers have found that organisms have distinctive external morphology and organization. By imitating the external morphology, structural characteristics or movement mechanism of organisms, novel ideas, new principles, and innovative theories can be provided for the innovation and sustainable development of geotechnical engineering. This paper mainly expounds on the bio-inspired application in geotechnical engineering from three perspectives: geo-materials, geotechnical components, and drilling &amp; excavation equipment, and lists typical application cases. In conclusion, this paper presents a summary and prospects of bio-inspired geotechnical engineering, offering fundamental insights for future research.</p></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"1 3","pages":"Article 100025"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49732921","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":"State-of-the-art review on plant-based solutions for soil improvement","authors":"Shanshan Li,&nbsp;Ziteng Wang,&nbsp;Hans Henning Stutz","doi":"10.1016/j.bgtech.2023.100035","DOIUrl":"https://doi.org/10.1016/j.bgtech.2023.100035","url":null,"abstract":"<div><p>Vegetation has been used as a means in geotechnical engineering for soil improvement and erosion control. This paper aims to present a state-of-the-art review and future prospective on soil improvement and reinforcement with plants, mainly from a perspective of plant mechanical effects. The mechanics of roots and root-soil composite are reviewed with regard to experiments, including root mechanical tests, direct shear tests, pullout tests and triaxial tests. Various factors influencing root reinforcement are characterized and discussed to explain root-soil interactions and related soil strengthening mechanisms. Considering cost and efficiency, extreme climates, and the conflicting mechanisms of plant growth and soil improvement, researchers have introduced nature-based water-soluble polymers (WSPs) into soil improvement to promote vegetation establishment and provide additional binding strength between soil particles. Despite the benefits, existing related researches and concepts are scarce, and there is still a significant knowledge gap in the coupling effect of WSP and plants for soil improvement. The review indicates that the combination of vegetation and WSP has the potential to create “trade-off” and “complementarity” for progressive soil improvement. Finally, new research topics in the field of soil improvement with plants are identified in the review.</p></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"1 3","pages":"Article 100035"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49732789","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":"Bio-grouting technologies for enhancing uniformity of biocementation: A review","authors":"Junjie Zheng ,&nbsp;Hanjiang Lai ,&nbsp;Mingjuan Cui ,&nbsp;Xingzhi Ding ,&nbsp;Yajie Weng ,&nbsp;Jianwei Zhang","doi":"10.1016/j.bgtech.2023.100033","DOIUrl":"https://doi.org/10.1016/j.bgtech.2023.100033","url":null,"abstract":"<div><p>Biocementation-based soil improvement is an emerging ground treatment method in geotechnical engineering that has garnered extensive attention over the past two decades. One of the challenges associated with this method revolves around the uniformity of biocementation, a crucial factor closely tied to bio-grouting technology. The traditional biotreatment methods, the two-phase method and the one-phase method, suffer from the issue of non-uniform biocementation. Consequently, in recent years, various improved grouting technologies have been proposed to address this concern by aiding bacterial adsorption and controlling carbonate precipitation. This paper reviews the mechanisms and grouting processes employed in these enhanced bio-grouting technologies. Additionally, the challenges of implementing these grouting technologies in real-world applications are also thoroughly discussed.</p></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"1 3","pages":"Article 100033"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49732787","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":"Effect of drying-wetting cycles on the durability of calcareous sand reinforced by MICP and recycled shredded coconut coir (RSC)","authors":"Hailei Kou ,&nbsp;Xiang He ,&nbsp;Zhendong Li ,&nbsp;Weiwei Fang ,&nbsp;Xixin Zhang ,&nbsp;Zhaotun An ,&nbsp;Yalei Wu","doi":"10.1016/j.bgtech.2023.100038","DOIUrl":"https://doi.org/10.1016/j.bgtech.2023.100038","url":null,"abstract":"<div><p>Microbial-induced carbonate precipitation (MICP) technique has been adopted in geotechnical engineering widely. In this study, the effect of drying-wetting cycles on MICP-recycled shredded coconut coir (RSC) reinforced calcareous sand was studied, and the deterioration mechanism under drying-wetting cycles was revealed. Test results indicated that drying-wetting cycles exert an important influence on the durability of MICP-RSC reinforced specimens. With the increase of drying-wetting cycles <em>N</em>, the specimens demonstrated significant increase in mass loss rate and critical void ratio, decrease in maximum shear modulus, peak strength and toughness. Furthermore, an increase in the initial relative density reduced the deterioration of MICP-RSC reinforced specimens exposed to drying-wetting cycles. Higher initial relative density of the specimen correlates with an increased maximum shear modulus, peak stress and toughness, a decreased in permeability and critical void ratio. Microanalysis revealed that the generated calcium carbonate adhering to sand particles and RSC gradually dropped off with the increase of <em>N</em>, weakened cementation, and led to the deterioration of MICP-RSC reinforced specimens, which is consistent with the deterioration characteristics under drying-wetting cycles.</p></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"1 3","pages":"Article 100038"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49710384","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}