检索结果-内蒙古大学图书馆

SSRN 2023年

作者： Liu, Jiahao Liu, Dongxu Yang, Jianxiao Liu, Yue Zhang, Xin Key Laboratory for Advanced Carbon Materials and Applied Technology of Hunan Province College of Materials Science and Engineering Hunan University Changsha410082 China College of Resources and Environment University of Chinese Academy of Sciences Beijing101408 China Beijing Yanshan Earth Critical Zone National Research Station University of Chinese Academy of Sciences Beijing101408 China

Adsorption is considered as the most promising method for the removal of emerging siloxane pollutants. In the present work, a series of activated carbon fibers (ACFs) are employed to evaluate the adsorption capacity of octamethylcyclotetrasiloxane (D4). The pore structure and surface chemistry properties are well characterized, and the effects on D4 adsorption are explored as well. Moreover, the adsorption process and kinetics of D4 on ACFs are unraveled by static adsorption approach. The results suggest that the viscose-based ACFs exhibited the highest dynamic adsorption capacity of 932.93 mg/g and static adsorption capacity of 656.3 mg/g at 25°C. In particular, the D4 adsorption capacity on ACFs is closely related to the micropore structure of ACFs, especially their larger micropore volume (1-1.5 nm). In addition, the phenolic hydroxyl group of ACFs also play an important role in the adsorption process. The adsorption process and kinetic results suggest that the adsorption behavior obeyed the Freundlich model and that the diffusion of D4 in the pores rather than external diffusion is the rate-determining step during the mass transfer process at low temperature and low D4 concentration. More importantly, ACFs have abundant active sites, and the adsorption kinetics are dominated by adsorption onto active sites. This work would be helpful to deeply understand the adsorption mechanism of D4 and rational design of ACFs for efficient D4 removal. © 2023, The Authors. All rights reserved.

关键词： Adsorption

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Thermochemical Energy Storage by Calcium Looping Process that Integrates Co2 Power Cycle and H2o Steam Power Cycle

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SSRN 2022年

作者： Luo, Cong Xu, Yongqing Lu, Chuangao Wang, Guang Yan, Xiaopei Gao, Ge Lu, Bowen Wu, Fan Zhang, Liqi State Key Laboratory of Coal Combustion School of Energy and Power Engineering Huazhong University of Science and Technology Wuhan430074 China State Environment Protection Key Laboratory of Environmental Monitoring Quality Control China National Environmental Monitoring Centre Beijing100012 China State Grid Hebei Electric Power Research Institute Shijiazhuang050021 China

Effects of different CaO-based raw materials, and various organic acid modification on the conversion of CaO heat carriers in close-loop calcium looping process coupled thermochemical energy storage(CaLP-TCES) system are investigated. Besides, a novel CaLP-TCES system that integrates CO2 cycle and H2O steam cycle to make full use of the energy in the system was proposed. Natural CaO-based heat carriers underwent drastically deactivation over the CaLP-TCES cycles. Compared with other natural materials, limestone presented the best cyclic carbonation conversion, which retained 14.2% of conversion rate, while glycine modification doubled the conversion rate of it. The efficiency of the CaLP-TCES system presented "S" type growth with the increase of carbonation conversion and carbonation temperature, while it showed a parabolic growth with the increase of pressure ratio. In addition, the global system efficiencies in the fullday time mode are always ~72% higher than that in daytime mode. Hence, the glycine-limestone would be a promising heat carrier for the CaLP-TCES system, and CaLP-TCES in fullday time mode is more applicable for the concentrated solar power. 850 ℃ might be a good option for carbonation process, and the higher carbonation conversion rate and pressure ratio would be more benefit for the global system efficiency. © 2022, The Authors. All rights reserved.

关键词： Carbonation

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Optimising Urban Energy Dynamics: A Multifactorial Approach to Building Energy Consumption and Pv Generation in Urban Blocks

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SSRN 2024年

作者： Li, Gaomei Zhou, Huangwanjin Kang, Jian Sun, Hao Xu, XiaoDong Chen, Yixing Zhong, Hua Xu, Shen School of Architecture & Urban Planning Huazhong University of Science and Technology Wuhan430074 China State Key Laboratory of Subtropical Building and Urban Science Guangzhou510641 China Hubei Engineering and Technology Research Center of Urbanization Wuhan430074 China LondonWC1E 6BT United Kingdom School of Architecture Design and Built Environment Nottingham Trent University NottinghamNG1 4FQ United Kingdom Department of Architecture and Built Environment University of Nottingham NottinghamNG7 2RD United Kingdom College of Civil Engineering Hunan University Changsha410082 China School of Architecture Southeast University Nanjing210096 China

Urban block morphology and function are key factors affecting building energy consumption and photovoltaic (PV) generation potential. This study investigates the synergistic effect of urban block morphology and function on building energy consumption and PV power generation potential. The research employs a k-means clustering algorithm to categorize 150 urban blocks in Wuhan, China, and proposes a workflow for evaluating energy use, solar potential, and load balancing on a block scale. The findings reveal that office blocks consume 148.90% more energy annually than residential blocks, while commercial blocks consume 323.06% more. The block with the highest PV energy generation potential was multi storey slab commercial streets, which was 422.06% higher than high-rise pavilion A office block. The study also found that multi-storey slab and multi-storey courtyard residential blocks could achieve a balance between energy supply and demand with over 100% PV substitution rates while the high-rise pavilion A office block had only 14.63%. The study contributes a scalable model for assessing urban energy dynamics considering block morphology and function over time. The findings can guide sustainable urban planning to balance energy supply and demand. © 2024, The Authors. All rights reserved.

关键词： Morphology

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Tannin Acid Induced Anti-Corrosive Film Toward Stable Zn-Ion Batteries

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SSRN 2022年

作者： Zhang, Peng-Fang Wu, Zhenzhen Zhang, Shao-Jian Liu, Ling-Yang Tian, Yuhui Dou, Yuhai Lin, Zhan Zhang, Shanqing Shandong Provincial Key Laboratory Collaborative Innovation Center of Chemical Energy Storage and Novel Cell Technology School of Chemistry and Chemical Engineering Liaocheng University Liaocheng252000 China Guangdong Provincial Key Laboratory of Plant Resources Biorefinery School of Chemical Engineering and Light Industry Guangdong University of Technology Guangzhou510006 China School of Environment and Science Gold Coast Campus Griffith University QLD4222 Australia Shandong Institute of Advanced Technology Jinan250100 China

Aqueous Zn-ion batteries (AZIBs) have been regarded as a promising next-generation energy storage system. However, serious dendrite growth and parasitic reactions on the Zn anodes degrade the battery performance. Inspired by the anticorrosion strategy for metal protection, a simple and cost-effective method of tannin acid (TA) modification is applied to build a ZnTA anticorrosive film on Zn anodes (i.e., ZnTA@Zn). Strong chemical interaction between Zn and phenolic hydroxyl groups in TA molecules endows ZnTA with the excellent film-forming capacity of ensuring uniform surface and desirable coverage on Zn anodes. A remarkable suppression of parasitic hydrogen evolution during Zn plating is observed at the ZnTA@Zn anodes, evidenced by in-situ electrochemical gas chromatography (EC-GC). The symmetric cells with the ZnTA@Zn anodes show long-term stability of over 4500 cycles under an ultra-high current density of 30 mA×cm-2, verifying the excellent reversibility of the ZnTA@Zn anodes. Besides, the ZnTA film also demonstrates remarkable ability in suppressing the Zn corrosion resulting from shuttling polyiodide. Furthermore, with the as-prepared ZnTA@Zn anodes, Zn-I2 full batteries are constructed, delivering excellent rate performance and ultra-long lifespan (20,000 cycles at 6 A g-1). The protective mechanism of anticorrosive films against electrolyte/polyiodide corrosion uncovered in this work could significantly contribute to the commercialization of the Zn ion batteries. © 2022, The Authors. All rights reserved.

关键词： Anodes

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Evaluate Climate Change and Anthropogenic Activities Influencing Geochemical Variations in Sediment between and within the Avulsion Period in the Lower Yellow River Avulsion Channels

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SSRN 2024年

作者： Rajendran, Viji Yujun, Yi Xueyuan, Wang Varatharajan, Akila Ministry of Education Key Laboratory of Water and Sediment Science School of Environment Beijing Normal University Beijing100875 China Department of Marine Science and Convergence Technology Hanyang University ERICA Campus 55 Hanyangdaehak-ro Sangnok-gu Ansan-si Gyeonggido426-791 Korea Republic of Central Research Laboratory Department of Research Meenakshi Academy of Higher Education and Research West K.K. Nagar Tamil Nadu Chennai600078 India School of Civil Engineering Yantai University Shandong264005 China

The geochemical data from sediments in avulsion channels provide historical evidence of climate change and human-induced alterations in river basin environments. The present study focused on the particle size of sediments in cores and the level of geochemical variation in avulsion channels of the Lower Yellow River Delta, China. The sediment samples were collected in a depth range of 20-400 cm in avulsion channels. The collected samples analysis for sediment particle size and geochemical composition using standard methods. The results demonstrated rapid increases in agriculture practices, rainfall pattern changes, and terrestrial sediment runoff reduction in river basins after the 1960s. The reduced sediment loads in the Sanmenxia Reservoir significantly changed the sediment grain size and geochemical levels in the avulsion channel during the 1960.8-1961.1 period. In particular, TC, TN, and C/N levels decreased with increasing sediment depth. The C/N values of © 2024, The Authors. All rights reserved.

关键词： Sediments

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Traffic Light-Type Ratiometric Fluorescent Visual Sensing of Cs+ in Soybean Oil Based on Dimension Regulation of 2d Perovskite Nanosheets

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SSRN 2022年

作者： Zhang, Peng Zhang, Shufen Hu, Xiaoxi Zhang, Maosheng You, Chaoyu Chen, Guoliang Yang, Wenli Huang, Wei Chen, Tianju Li, Feiming College of Chemistry Chemical Engineering and Environment Minnan Normal University Zhangzhou363000 China Fujian Province Key Laboratory of Modern Analytical Science and Separation Technology Minnan Normal University Zhangzhou363000 China Intelligent Wearable Engineering Research Center of Qingdao State Key Laboratory of Bio-Fibers and Eco-Textiles Research Center for Intelligent and Wearable Technology College of Textiles and Clothing Qingdao University Qingdao266003 China

Determination of cesium ion in soybean oil is of high importance since the increasing risk from releasing of main component of nuclear waste cesium 137. The complex composition and high viscosity of soybean oil make it necessary to convert it into water phase by nitration before detection, so developing a simple, accurate and sensitive method for on-site sensing of Cs + in soybean oil is still a big challenge. In this work, we report a traffic light-type ratiometric fluorescent strategy for the visual sensing of Cs + in soybean oil based on dimensional regulation of two dimensional (PEA) 2 PbI 4 perovskite nanosheets (NSs). The PEA + in (PEA) 2 PbI 4 NSs exchanged with Cs + and lead to dimension of partial (PEA) 2 PbI4 NSs progressively increase from 2D to 3D CsPbI 3 NCs. Resultantly, the fluorescence of (PEA) 2 PbI 4 NSs decreases with a concomitant fluorescence enhancement of CsPbI 3 NCs upon increasing the concentrations of Cs + , and the emission accordingly change from green, yellow to red with a high fluorescence colorimetric resolution up to 5.0 μM, make it successful to achieve on-site sensing of Cs + in soybean oil just with naked eye in 5 min without any nitration, demonstrating a bright application future for determination of Cs + in the soybean oil. © 2022, The Authors. All rights reserved.

关键词： Fluorescence

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RS-ModCubes: Self-reconfigurable, Scalable, Modular Cubic Robots for Underwater Multitasking

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arXiv 2024年

作者： Zheng, Jiaxi Dai, Guangmin He, Botao Mu, Zhaoyang Meng, Zhaochen Zhang, Tianyi Zhi, Weiming Fan, Dixia Robotics Institute School of Computer Science Carnegie Mellon University PittsburghPA15213 United States Zhejiang University Zhejiang Hangzhou310027 China Key Laboratory of Coastal Environment and Resources of Zhejiang Province School of Engineering Westlake University Zhejiang Hangzhou310030 China Department of Computer Science University of Maryland College ParkMD20742 United States Institute of Advanced Technology Westlake Institute for Advanced Study Zhejiang Hangzhou310024 China

This paper introduces a reconfigurable underwater robot system, RS-ModCubes, which allows scalable multi-robot configuration. An RS-ModCubes system consists of multiple ModCube modules, that can travel underwater with 6 DoFs and assemble with each other into a larger structure with onboard electromagnets. This system is designed to support diverse underwater applications through modularity and reconfigurability, eliminating the need to customize mechanical designs for a specific task. We present a modeling framework tailored for such reconfigurable robot systems, with hydrodynamics integrated based on Monte Carlo approximation. A model-based feedforward Proportional Derivative (PD) controller serves as the baseline for control. Inspired by dexterous manipulation, we evaluated the robot’s maximum task wrench space and power efficiency, compared against four commercial underwater robots. RS-ModCubes is validated via both real-world experiments and simulations, including individual and multi-module trajectory tracking and hovering docking. We open-source the design and code to facilitate future research: https://***/***/. © 2024, CC BY.

关键词： Machine design

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Camphor Leaves Can Better Bio-Monitor the Spatial Distribution of Atmospheric Copper and Cadmium Deposition than Tree Rings Around a Large Smelter

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SSRN 2022年

作者： Cui, Hongbiao Zhao, Yingjie Zhang, Wei Zhu, Zhenqiu Liang, Jiani Li, Detian Zhou, Jing Zhou, Jun School of Earth and Environment Anhui University of Science and Technology Huainan232001 China Engineering laboratory of Anhui Province for comprehensive utilization of water and soil resources and construction of ecological protection in mining area with high groundwater level Anhui University of Science and Technology Huainan232001 China Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil Science Chinese Academy Sciences Nanjing210008 China Department of Environmental Earth and Atmospheric Sciences University of Massachusetts LowellMA01854 United States

The atmospheric deposition of copper and cadmium was monitored in eight sites around a copper smelter to verify whether tree leaf and ring can be used as bioindicators to track spatial pollution record. Resulted showed total atmospheric deposition of copper (103–1215 mg/m 2 /yr) and cadmium (3.57–11.2 mg/m 2 /yr) were 4.73–66.6 and 3.15–12.2 times higher than those in background site (164 mg/m 2 /yr and 0.93 mg/m 2 /yr). The frequencies of wind directions significantly influenced the atmospheric deposition of copper and cadmium, and the highest atmospheric deposition of copper and cadmium were at the prevalent northeastern wind (JN), and low frequency south (WJ) and north (SW) winds for the lowest deposition fluxes. Atmospheric copper and cadmium deposition were significantly positively correlated with metals uptake of Cinnamomum camphora leaves, indicating they were the major source of tree leaves accumulation. Since the bioavailability of cadmium was higher than that of copper, the atmospheric deposition of cadmium was more easily adsorbed by tree leaf and ring, resulting in only significant relation between atmospheric cadmium deposition with soil cadmium as well as tree ring cadmium. Although tree rings cannot correctly record the atmospheric copper and cadmium deposition, higher concentrations in the transplanted tree-rings suggested tree-rings can reflect to some extent the variations of atmospheric deposition. Generally, both leaf and tree ring can reflect cadmium deposition, while leaf copper can better bio-indicate copper deposition. Therefore, camphor leaves can serve for biomonitoring purposes to assess the spatial distribution of atmospheric deposition. © 2022, The Authors. All rights reserved.

关键词： Biochemistry

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Creep Features and Mechanism of Active-Layer Detachment Slide on the Qinghai-Tibet Plateau by Insar

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SSRN 2023年

作者： Wang, Fei Wen, Zhi Gao, Qiang Yu, Qihao Li, Desheng Chen, Liangzhi State Key Laboratory of Frozen Soil Engineering Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Lanzhou730000 China University of Chinese Academy of Sciences Beijing100049 China Nanjing University of Science and Technology School of Science Nanjing210000 China Swiss Federal Institute for Forest Snow and Landscape Research WSL Zürcherstrasse 111 BirmensdorfCH-8903 Switzerland

An active-layer detachment slide (ALDS) occurred on September 21, 2018, in the Fenghuoshan mountains of the Qinghai-Tibet Plateau (34°39.1'N, 92°53.5'E). With the Sentinel-1A image from Copernicus Open Access Hub, we used small baseline subsets to achieve the time series deformation map to analyze the thermo-spatial creep feature, motion pattern, trigger mechanism, and correlation of environmental changes in the ALDS. The SBAS (the Small Baselines Subset) results show that the trailing part of ALDS has the largest downward deformation rate;however, the leading area was small, and the creep feature shows a clear seasonal change corresponding to the freeze-thaw cycle. We also divided the motion pattern into three stages: moderate creep, steady creep, and rapid collapse, based on the deformation rate. Meteorological observation and reanalysis data, as well as borehole data, show that heavy precipitation in the summer of 2017 and 2018 promoted the formation of underground ice, while high air temperatures allowed the thaw plane to reach the ice-rich zone, and confined water generated by the two-way freezing process resulted in ALDS. Additionally, the relationship between deformation rate and precipitation and the temperature has a lag of about one month, and the correlation between changes in thawing depth and deformation is obvious, which is the direct trigger of ALDS in permafrost regions. Finally, we also identify that ALDS is a mixed-type landslide and that cumulative deformation and creep damage play the main roles in triggering ALDS. © 2023, The Authors. All rights reserved.

关键词： Creep

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Application of biological desulfurization technology in crumb rubber modified asphalt: Performance optimization and high-temperature emission suppression

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Construction and Building Materials 2025年 489卷

作者： Xie, Juan Zhou, Yan Zhao, Xucheng Ding, Zheyu Li, Shuaihui School of Transportation Changsha University of Science and Technology Changsha 410114 China National Key Laboratory of Green and Long-Life Road Engineering in Extreme Environment (Changsha) Changsha University of Science and Technology Changsha 410114 China

The high viscosity of crumb rubber modified asphalt (CRMA) raises the temperature of construction mixing. This increases the harmful emissions in the paving process of asphalt construction, which limits its application in the road field to a certain extent. Therefore, in this paper, two microorganisms were utilized to conduct desulfurization treatment on crumb rubber (CR) to obtain bio-desulfurized crumb rubber (BCR). Upon this foundation, bio-desulfurized crumb rubber modified asphalts (BCRMA) were prepared. Firstly, the microscopic morphologies and chemical structures of BCR were characterized. After biological treatment, the number, area and porosity of the pores on the surface of BCR increased significantly. The pore size, sulfur element content and the crosslinking density decreased. Subsequently, the performance of BCRMA was studied. The low-temperature property and the compatibility of BCR with base asphalt (BA) were improved. The high-temperature property decreased, but the decrease was not significant. Finally, the concentration and types of volatile organic compounds (VOCs) and hydrogen sulfide (H2S) at high temperatures were detected. After bio-desulfurization, the concentration of VOCs and H2S in the modified asphalt flue gas were significantly reduced. The types of sulfur-containing organic compounds (SCs) were reduced by 50 %, which effectively inhibited harmful emissions to the environment and human health.

关键词： Biological desulfurization Crumb rubber modified asphalt Harmful emission Performance optimization

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