Article
Ecology
Ma. Fernanda Sanchez-Soto, Daniel Cerqueda-Garcia, Rocio J. Alcantara-Hernandez, Luisa I. Falcon, Daniel Pech, Flor arcega-Cabrera, Ma. Leopoldina Aguirre-Macedo, Jose Q. Garcia-Maldonado
Summary: This study investigated the distribution and composition of sulfate-reducing microorganisms in surficial sediments of the Northwestern Gulf of Mexico (NWGoM). The results showed that water depth, temperature, redox state, and metal content were major environmental drivers for the SRM communities in the studied sites. The research contributes to understanding the resilience and stability of benthic microbial communities facing pollution in the NWGoM.
Article
Environmental Sciences
Lei Zhou, Jun Wu, Jia-Heng Ji, Jie Gao, Yi-Fan Liu, Biao Wang, Shi-Zhong Yang, Ji-Dong Gu, Bo-Zhong Mu
Summary: This study investigated the microbial communities and functional groups in production water from five petroleum reservoirs in China using chemical and molecular biological analyses. The dominant phyla in these reservoirs were Proteobacteria, Deferribacterota, Firmicutes, Desulfobacterota, Euryarchaeota, and Thermoplasmatota. The corrosion rates in the production water were higher than controls and were positively correlated with the abundances of sulfate-reducing prokaryotes (SRP). The SRP diversity analysis showed differences between onshore and offshore oilfields, and the core SRP taxa varied based on temperature.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Biotechnology & Applied Microbiology
Tomas Hessler, Susan T. L. Harrison, Robert J. Huddy
Summary: In this study, the performance of two up-flow anaerobic packed bed reactors (UAPBRs) supplemented with acetate and lactate, respectively, was investigated for the remediation of sulfate-rich synthetic wastewater. The study found that the reactors exhibited different sulfate conversion rates and reduction rates under different conditions, and there were differences in the reaction mechanisms. 16S rRNA gene sequencing identified differences in the distribution of microbial communities in the reactors.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Review
Biochemistry & Molecular Biology
Ivan Kushkevych, Blanka Hyzova, Monika Vitezova, Simon K. -M. R. Rittmann
Summary: This paper explores microscopic methods for identifying sulfate-reducing bacteria (SRB), discussing their presence in various habitats and the techniques used for their detection. It also highlights the economic and health implications of SRB in industries and human microbiota, emphasizing the importance of methods for detecting these microorganisms, including molecular and fluorescence techniques.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Environmental Sciences
Manuel Jose Leal-Gutierrez, Rodrigo Cuellar-Briseno, Andrei M. Castillo-Garduno, Marisela Bernal-Gonzalez, Angel Enrique Chavez-Castellanos, Julio Alberto Solis-Fuentes, Maria-del-Carmen Duran-Dominguez-de-Bazua, Enrique Rodolfo Bazua-Rueda
Summary: The study successfully demonstrated the feasibility of transforming metal sulfates into metal sulfides through the UASB reactor, with a focus on optimizing the COD:SO42- ratio. By utilizing sulfate-reducing microorganisms to precipitate metal sulfides under appropriate pH and COD:SO42- ratio conditions, effective metal recovery was achieved.
WATER AIR AND SOIL POLLUTION
(2021)
Article
Geochemistry & Geophysics
Renzo C. Silva, Lloyd R. Snowdon, Haiping Huang, Steve Larter
Summary: This study investigates the impact of gamma radiation on crude oil composition using ultrahigh-resolution mass spectrometry and nuclear magnetic resonance techniques. It was found that oils with lower density and higher saturated hydrocarbon content are more susceptible to radiolysis, and the presence of water leads to the formation of oxygen-bearing organic compounds. The research also suggests the possibility of radiolysis-induced polymerization reactions and a decrease in sulfur and nitrogen-bearing species with increased radiation dose.
ORGANIC GEOCHEMISTRY
(2021)
Article
Multidisciplinary Sciences
Maria Irianni-Renno, Tom C. Sale, Susan K. De Long
Summary: Microbial processes in subsurface petroleum impacted systems are not well understood, hindering effective microbial degradation. This study successfully developed a method to extract high-quality RNA from petroleum-impacted soils, allowing for analysis of active microbial communities and characterization of metabolic processes during site remediation.
Review
Multidisciplinary Sciences
Abdul Salam Abd, Ahmad S. Abushaikha
Summary: This paper provides a detailed review on geochemical modeling in porous media, discussing concepts, mathematical modeling, and numerical simulation applications in the petroleum industry. Key physical concepts for chemical reactions, as well as methods for simplification and incorporation of numerical algorithms into reservoir simulations, are outlined. Additionally, two numerical cases are presented to highlight variations in variable formulations and evaluate the advantages and disadvantages of each approach.
SN APPLIED SCIENCES
(2021)
Article
Ecology
I. Trusei, Yu L. Gurevich, V. P. Ladygina, S. Fadeev, Yu P. Lankin
Summary: The study found that the introduction of fertilizers during bioremediation can significantly alter the number of microorganisms in contaminated areas, particularly anaerobic microorganisms. In the treatment of soil in the aeration zone, the number of anaerobes decreases, possibly due to competition from aerobic bacteria. Along with the increase in CFU numbers, some chemical properties change, indicating accelerated biodegradation of petroleum products.
CONTEMPORARY PROBLEMS OF ECOLOGY
(2021)
Article
Mechanics
Lei Zhou, Vahab Sarfarazi, Hadi Haeri, Pouyan Ebneabbasi, Mohammad Fatehi Marji, Mohammadreza Hassannezhad Vayani
Summary: This paper presents a new approach for measuring the fracture toughness of concrete using the edge cracked semi-cylinder disk (ECSD) specimens. The approach is validated through experimental tests and numerical simulations, showing good accuracy.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Energy & Fuels
Xin-Ning Bao, Ying-Cheng Li, Wei-Dong Zhang, Hui Zhang, Hong-Ze Gang, Jun Jin, Shi-Zhong Yang, Ou Sha, Bo-Zhong Mu
Summary: A new alkyl polyether benzyl sulfonate anionic surfactant, named sodium iso-tridecanol polyoxyethylene ether benzyl sulfonate, was synthesized with ultralow interfacial tensions at high salinity and high temperatures. Its structure was confirmed by 1H NMR. The surfactant showed strong interfacial activity and excellent phase behavior with high solubilization parameters, indicating its potential for enhanced oil recovery in high temperature and high salinity oil reservoirs.
Article
Biochemistry & Molecular Biology
Jing Zhou, Si-Jia Miao, Shi-Zhong Yang, Jin-Feng Liu, Hong-Ze Gang, Bo-Zhong Mu
Summary: A new sensitive method for the quantitative analysis of rhamnolipid was developed based on a simple derivatization reaction. The established method showed good reproducibility and accuracy, and was successfully applied to the quantitative analysis of rhamnolipid homologs.
BIOTECHNOLOGY AND APPLIED BIOCHEMISTRY
(2023)
Article
Engineering, Mechanical
Jianwei Huang, Hanbing Wang, Lei Zhou, Zheming Zhu, Ze Deng, Zhihong Wang
Summary: The stability evaluation of cracks in rock mass media is crucial in landslide scenarios, as the cracked rock mass can slide along the weak side under compressive and shear loads. Stress intensity factors (SIFs) for each crack tip are derived theoretically using complex function theory. The analytical solutions are compared with finite element analysis results from ABAQUS software, showing a small relative error. Experimental tests confirm that internal pressure increases mode II SIFs at crack tips, and shear failure in the cracked rock mass is more likely when there is a larger difference between horizontal and vertical compressive stresses. The inner crack tip of the longer crack is found to be the most dangerous point.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2023)
Article
Chemistry, Physical
Hong-ze Gang, Qing-ying Wu, Zhi-yuan Yang, Zhi-qing Su, Ying-cheng Li, Shi-zhong Yang, Bo-Zhong Mu
Summary: The adsorption kinetics of surfactin homologues at the n-hexadecane/aqueous solution interface was investigated using droplet-based microfluidic method. Molecular dynamics simulations showed that the adsorption energy of surfactin depends on its structure. Experimental results demonstrated that shorter chain surfactin, such as C13-surfactin and C14-surfactin, had faster adsorption and desorption rate constants. The study also revealed that C15-surfactin had a stronger tendency to adsorb at the interface due to its higher adsorption energy and aggregation behavior in solution.
JOURNAL OF PHYSICAL CHEMISTRY B
(2023)
Article
Chemistry, Physical
Shan Yuan, Hong-Ze Gang, Yi-Fan Liu, Lei Zhou, Muhammad Irfan, Shi-Zhong Yang, Bo-Zhong Mu
Summary: In this study, simulations were conducted to investigate the behavior of CO2 and CH4 adsorption and diffusion on kerogen models with different maturity. It was found that CO2 has a higher adsorption capacity compared to CH4, and this capacity increases with maturity. Furthermore, the addition of water reduces the adsorption and diffusion coefficients of both gases but increases the selectivity of CO2 over CH4. These findings suggest that injecting CO2 into shale gas and oil formations can enhance energy recovery.
MOLECULAR SIMULATION
(2023)
Article
Engineering, Mechanical
Kang Peng, Lei Zhou, Yuqing Dong, Xin Shui, Ze Deng, Jianxing Chen, Bo Feng
Summary: We used a novel single-notch triangle (SNT) sample to investigate the effect of a circular cavity on the dynamic fracture mechanisms in fractured rock masses. Dynamical loads were applied using a drop hammer weight device, and a modified finite difference method code was developed to simulate the dynamic cracking behavior. We calculated the maximum principal stress and circumferential stress around the circular cavity and studied the dynamic crack initiation toughness (DCIT) through experimental and numerical approaches. We found that the circular cavity promotes cracking initiation behavior and enhances the energy consumed during crack propagation.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2023)
Article
Green & Sustainable Science & Technology
Wei Wang, Ming-Yue Liang, Jian-Qiao Lang, Homely Isaya Mtui, Shi-Zhong Yang, Bo-Zhong Mu
Summary: A new bio-based zwitterionic surfactant with strong interfacial activity at high temperature was developed through the modification of renewable non-edible oils. The synthetic route was optimized to improve the interfacial activity of the final product by controlling and monitoring the residues of intermediates. This study confirms that the removal of residual intermediates and promotion of the conversion rate contribute to enhancing the interfacial activity and provides insights for the design of sustainable alternatives in enhanced oil recovery.
Article
Chemistry, Multidisciplinary
Jia-Yi Li, Yi-Fan Liu, Lei Zhou, Hong-Ze Gang, Jin-Feng Liu, Gang-Zheng Sun, Wei-Dong Wang, Shi-Zhong Yang, Bo-Zhong Mu
Summary: In this study, a new strain, Geobacillus thermodenitrificans ME63, capable of degrading hydrocarbons in thermophilic and facultative environments and producing biosurfactants, was isolated from an oilfield. The composition, chemical structure, and surface activity of the biosurfactant produced by G. thermodenitrificans ME63 were investigated. The biosurfactant was identified as surfactin with six variants, which exhibited excellent resistance to temperature, salinity, and pH changes in terms of its surface activity and emulsification properties.
Article
Biotechnology & Applied Microbiology
Li-Bin Shou, Zhao-Wei Hou, Yi-Fan Liu, Ying Wang, Lei Zhou, Jin-Feng Liu, Shi-Zhong Yang, Ji-Dong Gu, Xiao-Lin Wu, Bo-Zhong Mu
Summary: This study investigates the effect of air injection on microbial composition and transcriptional activity in oil reservoirs. The researchers found that Firmicutes, specifically the Bacillus genus, were the dominant active bacteria in all samples and their proportion increased with higher gas/liquid ratios. As the gas-to-liquid ratios increased, the microbes showed higher overall transcription activities and propionate became an important metabolite. This research provides theoretical guidance for activating endogenous oil displacement microorganisms and offers insights for the industrial exploitation of depleted reservoirs and extending the development life of oil reservoirs.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2023)
Article
Engineering, Mechanical
Jingming Qi, Lei Zhou, Hongdan Zhang, Jianxing Chen, Leijun Ma, Tongya Shi
Summary: Studying the mechanical response of rocks with different types of cracks is crucial for controlling the stability of underground mining projects. The research findings show that cracks perpendicular to the loading direction have a greater impact on the strength of rocks compared to cracks parallel to the loading direction. During the compression process, stress concentration phenomena occur first at the crack tip, leading to tensile splitting-type damage. Additionally, the compressive strength of the cracked rock samples tends to increase first and then decrease with the application of in-situ stress. These insights can be utilized to improve the stability of underground mining projects.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2023)
Article
Chemistry, Multidisciplinary
Entong Du, Lei Zhou, Ruizhen Fei
Summary: This study utilizes numerical modeling to investigate the stress field's evolution during shield construction, calculating the maximum bending moments and axial forces for different structures and construction conditions. The findings provide valuable insights for the design and optimization of shield tunneling methods.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Multidisciplinary
Junwei Zhang, Duanying Wan, Weiting Gao, Lei Zhou, Meng Wang
Summary: This study investigates the overall stability of cracks with various angles during fixed borehole blasting. The results show that pre-existing cracks from different angles impact both the blast hole and the newly generated cracks. These special cracks, with faster growth rates and longer lengths, are more prone to connecting with the free surface or other cracks, resulting in overall instability. The research findings have certain guiding significance for the stability analysis and hazardous area prediction of tunnel blasting with existing cracks.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Chemical
Homely Isaya Mtui, Fang-Hui Liu, Wei Wang, Jian-Qiao Lang, Shi-Zhong Yang, Bo-Zhong Mu
Summary: A new type of ultra-long chain zwitterionic surfactant, NDAS, with strong interfacial activity and good compatibility with salts and temperatures has been developed through a simple and effective method. This work is significant for the development of sustainable bio-based surfactants and expanding their applications.
GREEN CHEMICAL ENGINEERING
(2023)
Review
Microbiology
Asma Sani, Wan-Qi Qin, Jia-Yi Li, Yi-Fan Liu, Lei Zhou, Shi-Zhong Yang, Bo-Zhong Mu
Summary: This article summarizes the structural diversity of microbial lipopeptide biosurfactants and their applications as biocontrol agents in plants. Lipopeptides have low toxicity and wide range of applications, making them important in the pesticide industry.
MICROBIOLOGICAL RESEARCH
(2024)