Article
Microbiology
Olja Sovljanski, Lato Pezo, Jovana Stanojev, Branimir Bajac, Sabina Kovac, Elvira Toth, Ivan Ristic, Ana Tomic, Aleksandra Ranitovic, Dragoljub Cvetkovic, Sinisa Markov
Summary: MICP is a widely used bio-based solution in various engineering fields, and this study conducted a comprehensive analysis of soil bacteria, quickly screening out 5 bacterial strains with MICP potential through Standard Score Analysis and studying and characterizing their behavior.
Review
Construction & Building Technology
Ismael Justo-Reinoso, Andrew Heath, Susanne Gebhard, Kevin Paine
Summary: The use of aerobic non-ureolytic bacteria in self-healing cement composites has shown promising results, improving repair efficiency and engineering properties in a sustainable way. Further research and applications of these bacteria are warranted.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Environmental Sciences
Ming-Juan Cui, Aloysius Teng, Jian Chu, Bin Cao
Summary: This study presented a quantitative, high-throughput urease activity assay based on a 96-well plate, which can be used for comparing and rapidly screening urease-producing bacteria. The assay revealed bacterial strains with high urease activity and showed the inhibitory effect of calcium on urease activity. The method has potential wide applications in environmental, civil, and medical research.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Suyu Qiao, Guoquan Zeng, Xitong Wang, Chenggang Dai, Mingping Sheng, Qun Chen, Fei Xu, Heng Xu
Summary: The study showed that the MICP process could effectively remove common heavy metals in mining areas, such as copper, zinc, nickel, and cadmium.
Article
Engineering, Environmental
Charles M. R. Graddy, Michael G. Gomez, Jason T. DeJong, Douglas C. Nelson
Summary: Microbially induced calcite precipitation is a biomineralization process that has various applications in civil engineering and ground improvement. The study compared the effectiveness and microbial composition of ureolytic bacterium Sporosarcina pasteurii bioaugmented soil with a biostimulation method enriching native ureolytic soil bacteria in situ. Selective enrichment of Firmicutes was observed, with unexpected within-genus diversity and robustness. Despite poor competition, augmented S. pasteurii improved soil microbial composition, and the uncharacterized attached community significantly contributed to overall behavior.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Biotechnology & Applied Microbiology
Frederic M. Lapierre, Isabel Bolz, Jochen Buechs, Robert Huber
Summary: This article presents a microplate assay for quantifying urease activity using a fluorescent pH indicator, which is suitable for automated measurements. The assay allows for non-hazardous and reliable measurements without the need for sample preparation. It is important for research on Microbial Induced Calcite Precipitation.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Microbiology
Laxmi Leeprasert, Duenrut Chonudomkul, Chanita Boonmak
Summary: Microbially induced calcium carbonate precipitation (MICP) is a promising technique for its applications in civil engineering, environmental, and geotechnical fields. This study identified two bacterial isolates, Lysinibacillus fusiformis 5.1 and Lysinibacillus xylanilyticus 4.3, which showed high urease activity and calcium carbonate formation capabilities, making them potential candidates for MICP in engineering applications.
Article
Environmental Sciences
Weila Li, Yifan Yang, Varenyam Achal
Summary: Corncob powder was proven to be a viable replacement for biochar in facilitating microbial carbonate precipitation, with the ability to effectively immobilize ureolytic bacteria for the development of biochemical composite material (BCM) that showed improved calcite precipitation in cadmium-contaminated soil remediation. The study highlighted the multi-directional benefits of BCM, including enhanced soil urease activity, bacterial propagation, surface functional groups, calcite precipitation, and cadmium immobilization rate, showcasing its potential as an agricultural material.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Construction & Building Technology
Qionglin Fu, Yuejun Wu, Siyu Liu, Liulei Lu, Junfeng Wang
Summary: This study compared the growth and mineralization characteristics of Sporosarcina pasteurii under freshwater and seawater conditions, finding that seawater salinity changed the morphological structure of the bacterium and reduced its growth rate. Despite this, the bacterium survived in seawater and induced calcium carbonate precipitation to effectively fill cracks during self-healing.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Sarfaraz Hadi, Husain Abbas, Abdullah Almajed, Abobaker Binyahya, Yousef Al-Salloum
Summary: This study aims to elucidate some key factors of microbially induced calcite precipitation (MICP). The experiment was conducted in sand columns simulating standard cement mortar conditions, and it was found that urease activity of the bacteria significantly increased with increasing cell count and incubation period. Scanning electron microscopy and X-ray diffraction confirmed the deposition of calcite in the treated columns.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Construction & Building Technology
Aysan Farajnia, Ali Shafaat, Safar Farajnia, Mohsen Sartipipour, Hamed Khodadadi Tirkolaei
Summary: This study introduces ureolytic bacterial strains with high urease activity found in historical adobe structures and deserts in Iran, which were evaluated for the production of biologically cemented bricks. The produced bio-bricks showed satisfactory compressive strength, water absorption percentage, and durability. These findings are valuable for future sustainable construction.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Environmental Sciences
Qian Cai, Min Xu, Jing Ma, Xiaohong Zhang, Gang Yang, Lulu Long, Chao Chen, Jun Wu, Chun Song, Yinlong Xiao
Summary: In this study, rice straw coupled with Sporosarcina pasteurii was used to treat Cd-contaminated paddy soil, reducing the detrimental effects of microbially induced carbonate precipitation and decreasing Cd bioavailability. This treatment enhanced soil fertility and ecological functions, as well as increased the relative abundance of dominant phyla such as Proteobacteria and Firmicutes. Important environmental factors affecting bacterial community composition included substances providing phosphorus, alkaline hydrolysis nitrogen, and substances providing potassium. Thus, using rice straw mixed with S. pasteurii is a promising application for treating Cd-contaminated paddy soil.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Review
Engineering, Chemical
Kbrom Alebel Gebru, Tekleweyni Gebremicael Kidanemariam, Haile Kidane Gebretinsae
Summary: This study reviews the production of bio-cement using MICP and factors affecting the process, including bacteria, pH, cementation solution, injection, and temperature. Bacteria serve as nucleation sites for Ca2+ ions, promoting the formation of CaCO3 and soil cementation. MICP can enhance the compressive strength and reduce water permeability.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Construction & Building Technology
Yang Zhao, Fanyou Meng, Peishuo Fan, Hong Li, Yunlong Niu, Pinghui Liu
Summary: This study examines the effect of microbial induced carbonate precipitation (MICP) treatment on the mechanical properties of rubberised mortar. The study finds that MICP treatment can enhance the interface bonding strength between rubber and cement, improving the strength of rubberised mortar. However, MICP-treated rubberised mortar is brittle and has low impact resistance.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Green & Sustainable Science & Technology
Monika Dagliya, Neelima Satyam, Ankit Garg
Summary: In this study, an environmentally friendly microbial-induced calcium carbonate precipitation (MICP) technique was used to reinforce desert sand using the stopped-flow pouring method. Experimental results showed that biotreatment with urease-producing bacteria and cementation solution significantly improved the strength of the sand and exhibited rock-like behavior.
Article
Engineering, Geological
Sathee Surendran Surya, Dali Naidu Arnepalli
Summary: The study presents a simplified gas permeability apparatus for evaluating the gas permeability characteristics of geomaterials at various temperatures and compaction states. A prediction model is proposed to estimate the gas permeability characteristics of different geomaterials based on soil-water characteristics, considering the effect of temperature. The efficacy of the model has been demonstrated through validation with experimental results and literature data.
ENVIRONMENTAL GEOTECHNICS
(2021)
Article
Engineering, Environmental
Sana Nivedita, Dali Naidu Arnepalli, Chandraraj Krishnan
Summary: A novel and efficient obligate methanotroph was isolated from a methanotrophic consortium originated from a municipal solid waste leachate. The isolate belonged to the genus Methylosarcina and was further characterized by various analytical methods. The study revealed the potential of the isolate in methane bioremediation through detailed analysis of methane oxidation efficiency and carbon capture efficiency.
JOURNAL OF ENVIRONMENTAL ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Mahasakti Mahamaya, Sarat Kumar Das, Krishna R. Reddy, Surabhi Jain
Summary: The addition of biopolymers can enhance the stability of industrial waste materials and reduce their dispersivity, improving the engineering properties of the soil. Different types and concentrations of biopolymers have varying degrees of impact, with a 1% biopolymer solution being sufficient to enhance soil properties.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Electrical & Electronic
Aman Verma, Surabhi Jain, Nilesh Kumar Tiwari, M. Jaleel Akhtar
Summary: This paper presents a novel miniaturized noninvasive submersible compact planar sensor for estimating petroleum contents. The sensor, based on a microstrip technique, operates at a resonating frequency of 8.87 GHz with high sensitivity and accurate detection capability for different levels of petroleum contents in soil samples. The sensor also utilizes an innovative automated neural network-based algorithm for permittivity extraction and shows good repeatability in detecting materials contents, making it suitable for applications in transportation pipelines and mining exploration.
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS
(2021)
Article
Engineering, Environmental
C. B. Gupt, Sreedeep Sekharan, D. N. Arnepalli
Summary: This study quantified the influence of sodium acetate buffer on the adsorption capacity of bentonite and percentage removal of lead. The results showed that the use of sodium acetate buffer significantly reduces the adsorption capacity and percentage removal of lead by bentonite.
JOURNAL OF ENVIRONMENTAL ENGINEERING
(2022)
Article
Engineering, Geological
Dhanalakshmi Padmaraj, Dali Naidu Arnepalli
Summary: The study reveals that carbonation has a deleterious effect on the performance of lime-treated clay, reducing the compressive strength of treated soils by an average of 30%. The structure of treated clay varies with lime content and curing period, which influences the extent of carbonation.
INTERNATIONAL JOURNAL OF GEOSYNTHETICS AND GROUND ENGINEERING
(2021)
Review
Engineering, Geological
S. Keerthana, Dali Naidu Arnepalli
Summary: This review article provides insights into the hydraulic performance of different types of modified Smectite GCLs, highlighting osmotic swell enhancement and pore clogging as the primary mechanisms for improved hydraulic performance. The study also proposes using the swell index and the dielectric constant of permeant as indicators for assessing hydraulic behavior.
INTERNATIONAL JOURNAL OF GEOSYNTHETICS AND GROUND ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Kumbamutlang War, Gopika Raveendran, Dali Naidu Arnepalli
Summary: This study investigates the effect of the interaction between clay minerals and CO2 on the gas permeability and mechanical properties of clay. The results show that under confined conditions, the permeability of the clay decreases and the compressive stress increases, while under free and uniaxial conditions, the permeability of the clay increases. The magnitude of the swelling stress depends on the degree of expansion and applied overburden pressure.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2022)
Review
Engineering, Environmental
Dhanalakshmi Padmaraj, Dali Naidu Arnepalli
Summary: Carbonation is a harmful reaction in lime-stabilized earthworks as it leads to lime consumption, compromises the stability of cementitious phases, and affects the cohesion and shear strength of stabilized clays. Despite extensive research on the carbonation mechanism in cement and concrete, the understanding of carbonation in lime-treated soils is limited.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2023)
Article
Engineering, Geological
R. K. Anjana, S. Keerthana, Dali Naidu Arnepalli
Summary: This study investigated the diffusive transport of volatile organic compounds (VOCs) through high-density polyethylene (HDPE) geomembranes subjected to different temperatures and UV exposures. The results revealed that the phase, properties, temperature, and extent of aging significantly influenced the transport behavior of the contaminants.
GEOTEXTILES AND GEOMEMBRANES
(2023)
Article
Construction & Building Technology
Mahasakti Mahamaya, Surabhi Jain, Sarat Kumar Das, Rajdeep Paul
Summary: This manuscript aims to prepare alkali activated cementless controlled low strength material (CLSM) using industrial wastes such as ferrochrome slag (FS), ground granulated blast furnace slag, and fly ash. The physical and mechanical properties of different CLSM mix designs were evaluated and compared with cement-based FS-CLSM. The alkali activated FS-based CLSM exhibited adequate flowability and unit weight, with a strength range of 1.72 to 10.44 MPa and a California bearing ratio (CBR) value of 328%, making it a feasible pavement material. The study also highlighted the high durability and low levels of toxic metals in the leachate of FS-based CLSM, making it environmentally acceptable. Furthermore, a life cycle analysis was conducted to assess the impact of FS-based CLSM on the ecosystem and human health.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Soniya Mariya Varghese, Additi Roy Chowdhury, Dali Naidu Arnepalli, G. Ranga Rao
Summary: The CO2 adsorption capacity of carbon materials is influenced by their structural properties and the chemical nature of carbon networks. This study investigates the impact of pore size distribution and N-doping on CO2 adsorption in carbon materials derived from coco peat. The results show that nitrogen content in biomass-derived carbon does not have a positive effect on CO2 adsorption, while pore size distribution has a significant influence. The study also demonstrates the possibility of tuning pore size distribution in coco peat-derived carbons to achieve maximum CO2 adsorption capacity.
Article
Energy & Fuels
N. Adla, P. K. Bhukya, D. N. Arnepalli
Summary: This study developed a coupled thermo-hydromechanical (THM) model to evaluate the influence of thermal history on the hydro-mechanical performance of a bentonite buffer in a deep geological repository (DGR). The study found that thermal history caused shrinkage of the buffer and formation of voids, which were sealed through rehydration. Hydro-mechanical parameters such as swell deformation, porosity, permeability, etc. were assessed during the hydration process. The increased swell pressure resulting from thermal history could potentially impair the structural integrity of the waste contained canister at a DGR scale.
GEOMECHANICS FOR ENERGY AND THE ENVIRONMENT
(2023)
Article
Biotechnology & Applied Microbiology
Surabhi Jain, Chaolin Fang, Varenyam Achal
Summary: The review article elaborately discusses the metabolic pathways and mechanisms involved in MICP process, highlighting the advantages of denitrification over other pathways. It further explores the potential applications of denitrification in building materials and the challenges associated with its implementation.
Review
Engineering, Geological
N. J. Kollannur, D. N. Arnepalli
Summary: The electrochemical treatment of soil, ECT, involves using an external electric potential to introduce stabilizing chemicals into the soil, resulting in modifications to soil pH and interactions between clay fabric and ionic species. The study discusses how these changes impact migration mechanisms during ECT. By highlighting the impact of electrochemical modifications on treatment efficiency, the research provides a concise review of the field.
INTERNATIONAL JOURNAL OF GEOTECHNICAL ENGINEERING
(2021)
