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An Eco-Friendly Reservoir Operation Method to Balance Economic Benefits with Migration Protection for Grass Carps

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SSRN 2024年

作者： Liu, Hongrui Xu, Zhihao Yin, Xinan Wang, Jieliang Yang, Baiheng Zhou, Lei Yang, Wei Unit 32182 of People's Liberation Army Beijing100042 China State Key Laboratory of Water Environment Simulation School of Environment Beijing Normal University No. 19 Xinjiekouwai Street Beijing100875 China Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds Institute of Environmental and Ecological Engineering Guangdong University of Technology Guangzhou510006 China Unit 32377 of People's Liberation Army Beijing100029 China

Construction and operation of dams change the water's natural flow and thermal regimes, thus affecting normal migration of many fish species to reproduce or feed. Although existing eco-friendly reservoir operation studies have considered downstream flow or water temperature management to protect fish migration, there is still a lack of simultaneous management of flow and water temperature. In this study, we developed a reservoir operation optimization approach that balances socioeconomic benefits with reproductive migration of grass carps in China. We used a coupled hydrodynamic and water quality model based on the environmental Fluid Dynamics Code (EFDC) platform to simulate release water temperature and flow velocity under multiple reservoir operation scenarios. We then used the simulation data to train a dynamic artificial neural network (ANN) that predicted the release water temperature. By coupling the ANN with a reservoir operation optimization method, we developed a multi-objective optimization approach to simultaneously optimize water supply, hydropower generation, and migration protection for grass carps. We applied the model to China’s Danjiangkou Reservoir as a case study to generate optimal rules for reservoir operation. The optimal operation scheme increased the multi-year-averaged annual fish migration quality, which is related to swimming behavior and gonad development and is influenced by water temperature and flow velocity, by 16.7%, while increasing economic losses by 10.0% and decreasing hydropower generation by 12.8%. We also generated Pareto-optimal solutions to analyze the tradeoffs between economic benefits and fish migration protection. Our results promote efficient use of reservoir operations for fish migration protection and offer an optimization tool for hydro-ecological management. © 2024, The Authors. All rights reserved.

关键词： Water temperature

An Efficient Zn/Fe-Nc Catalyst Derived from Bimetallic Zeolitic Imidazole Frameworks for Oxygen Reduction Reaction in Air-Cathode Microbial Fuel Cell

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SSRN 2023年

作者： Wang, Qianwu Lu, Jingzhao Liu, Songlin Liang, Bolong Yu, Boqu School of Eco-Environment Hebei Key Laboratory of Close-to-Nature Restoration Technology of Wetlands Hebei University Baoding071002 China College of Environmental Science and Engineering Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria Tianjin Key Laboratory of Environmental Remediation and Pollution Control Nankai University Tianjin300350 China College of Science and Technology Hebei Agricultural University Cangzhou061100 China State Key Laboratory of Pollution Control and Resource Reuse Nanjing University Nanjing210093 China

The development of carbon-based catalysts to substitute Pt-based catalysts for the oxygen reduction reaction is of great importance to promote their practical application in energy conversion. Herein, we prepare Zn/Fe and nitrogen-codoped porous carbon (Zn/Fe-NC-x) as a cathode catalyst via a facile one-step pyrolysis predesigned bimetallic zeolitic imidazole framework. Systematic electrochemical studies demonstrate that the synthesized Zn/Fe-NC-0.5 possesses higher electrocatalytic activity towards oxygen reduction reaction. In particular, Zn/Fe-NC-0.5 has a smaller charge transfer resistance, larger exchange current density, and much higher open circuit potential and mainly proceededs via an efficient four-electron pathway. The microbial fuel cell equipped with the synthesized catalyst exhibits the highest maximum power density of 1954 ± 20 mW m-2. In addition, the effects of the iron doping content on the performance of the oxygen reduction reaction and maximum power density are evaluated: a moderate Fe doping content plays a crucial role in improving the catalytic activity, and the synergistic effect of Fe and N codoping promotes the cathode performance. In brief, Zn/Fe-NC, with advantages of facile synthesis, environmental friendliness and excellent electrochemical activity is a promising Pt-alternative catalyst for air-cathode microbial fuel cells in the future. © 2023, The Authors. All rights reserved.

关键词： Carbon

Land subsidence in coastal reclamation with impact on metro operation under rapid urbanization: A case study of Shenzhen

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Science of the Total environment 2025年 970卷 179020页

作者： Yang, Xinxin Wu, Huaina Zhou, Suhua Guo, Desai Chen, Renpeng College of Civil Engineering Hunan University Changsha410082 China Hunan Provincial Engineering Research Center of Advanced Technology and Intelligent Equipment for Underground Space Development Changsha410082 China Key Laboratory of Building Safety and Energy Efficiency of the Ministry of Education Changsha410082 China National Center for International Research Collaboration in Building Safety and Environment Hunan University Changsha410082 China

With rapid urbanization in coastal cities, the sharp increase in coastal reclamation due to human activity has caused serious land subsidence problems and threatened the safety of urban traffic in reclamation areas, especially in fast developing cities, such as Shenzhen. However, the spatio-temporal distribution of reclamation evolution and land subsidence to assist in metro operations on a regional scale remain under-explored. To fill-in this research gap, an attempt was made to monitor the coastal reclamation dynamics of Shenzhen from 1979 to *** spatial-temporal changes in the reclamation were discussed based on the Landsat 5, 7 and 8 datasets along with urban growth for a 40-year period. Accordingly, the fill height distribution was employed using available global DEM datasets to perform land fill height effect of metro system in the reclamation area. After understanding the spatial-temporal patterns of land reclamation changes, we focused on monitoring the land subsidence in reclamation area using time-series Sentinel-1 Interferometric SAR (InSAR) datasets by SVD and Stacking techniques. 48 scenes were acquired during ascending and descending passes respectively between 8/3/2015 to 8/8/2023 for the study area. The field measurements of metro deformation in reclamation area acquired from investigation data reflects the risk level of metro operational risk of urban traffic. In-depth analysis of reclamation characteristics revealed a direct relationship between urban expansion, land subsidence and metro deformation. A high correlation coefficient of 0.89 was observed between land subsidence variation and the metro deformation measured along metro line 2 and line 11 in reclamation area. Understanding the impact of land subsidence on metro operation is key to refining sustainable urban development in reclamation areas. © 2025

关键词： Urban planning

NOx storage and reduction assisted by non-thermal plasma over Co/Pt/Ba/γ-Al2O3 catalyst using CH_(4) as reductant

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Plasma Science and technology 2021年第2期23卷 76-84页

作者： Tao ZHU Xing ZHANG Nengjing YI Haibing LIU Zhenguo LI Institute of Atmospheric Environmental Management and Pollution Control China University of Mining&Technology(Beijing)Beijing 100083People's Republic of China Solid Waste and Chemicals Management Technology Center China Ministry of Ecology and EnvironmentBeijing 100029People's Republic of China National Engineering Laboratory for Mobile Source Emission Control Technology China Automotive Technology&Research Center Co.Ltd.Tianjin 300300People's Republic of China State Key Laboratory of Organic Geochemistry Chinese Academy of SciencesGuangzhou 510640People's Republic of China

NOx storage and reduction(NSR)technology has been regarded as one of the most promising strategies for the removal of nitric oxides(NOx)from lean-burn engines,and the potential of the plasma catalysis method for NOx reduction has been confirmed in the past few *** work reports the NSR of nitric oxide(NO)by combining non-thermal plasma(NTP)and Co/Pt/Ba/γ-Al2O3(Co/PBA)catalyst using methane as a *** experimental results reveal that the NOx conversion of NSR assisted by NTP is notably enhanced compared to the catalytic efficiency obtained from NSR in the range of 150°C–350°C,and NOx conversion of the 8%Co/PBA catalyst reaches 96.8%at 350°***(O_(2))has a significant effect on the removal of NOx,and the NOx conversion increases firstly and then decreases when the O_(2)concentration ranges from 2%to 10%.Water vapor reduces the NOx storage capacity of Co/PBA catalysts on account of the competition for adsorption sites on the surface of Co/PBA *** is a negative correlation between sulfur dioxide(SO_(2))and NOx conversion in the NTP system,and the 8%Co/PBA catalyst exhibits higher NOx conversion compared to other catalysts,which shows that Co has a certain SO_(2)resistance.

关键词： non-thermal plasma NOx storage and reduction Co/Pt/Ba/γ-Al2O3 catalyst NOx conversion influence parameter

Coupled modeling of rafting behaviour in nickel-based single crystal superalloys

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International Journal of Mechanical Sciences 2025年 297-298卷

作者： Lu, Pin Guo, Zixu Fan, Xueling Xu, Yilun Zhang, Yong-Wei Yan, Wentao Xi'an Key Laboratory of Extreme Environment and Protection Technology School of Aerospace Engineering Xi'an Jiaotong University Xi'an710049 China Department of Mechanical Engineering National University of Singapore Singapore117575 Singapore 1 Fusionopolis Way #16-16 Connexis Singapore138632 Singapore Department of Materials Imperial College LondonSW7 2AZ United Kingdom

Nickel-based single-crystal (NBSX) superalloys applied to turbine blades on advanced aero-engines, suffer from the creep degradation induced by microstructure evolution at high temperatures. Here, our experiments revealed a unique morphology change of γ' phase in NBSX superalloys during rafting, i.e. the fusion of adjacent γ' phase domains first appeared at both vertices of the vertical channel, rather than at the center of the channel. To comprehensively understand the mechanism of γ' phase domain evolution during creep, we integrate a cellular automata (CA) algorithm into a crystal plasticity finite element model (CPFEM) to simulate the evolution of γ' phase domains and creep deformation for NBSX superalloys. A microstructure evolution model is established to simultaneously capture the dissolution, coarsening, and rafting of γ' phase domains, which are implemented via a CA algorithm. The evolution rule of aluminum atomic equilibrium concentration driven by deformation energy, is introduced into the CPFEM-CA model to capture the unique γ' morphology evolution. The coupled model has been validated against experimental rafting data of NBSX superalloys. The results indicate that the observed unique rafting morphology is related to the element diffusion driven by deformation energy and leads to local stress concentration. The proposed CPFEM-CA model not only enhances the fundamental understanding of the γ' rafting behavior in NBSX superalloys, but also provides a powerful simulation tool for the creep behavior of γ'-strengthened superalloys. © 2025 The Author(s)

关键词： Single crystals

Preparation and Characterization of Na2FeO3

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SSRN 2023年

作者： Yan, Huidi Guo, Haoda Zhang, Naidong Zhao, Yankang College of Environmental Science and Engineering Dalian Maritime University Dalian116026 China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology Harbin150090 China Dalian Maritime University China

Na2FeO3 serves as a highly effective water-purifying agent, demonstrating superior performance when compared to ferrate(VI). This study focuses on the eco-friendly synthesis of green Na2FeO3 crystals utilizing sodium hypochlorite as the medium through a concentration method under depressurization. The green crystallization is meticulously characterized and identified as Na2FeO3, employing Infrared spectroscopy, UV/Vis spectroscopy, and X-ray diffraction techniques. Furthermore, this investigation delves into the impact of varying concentrations of Fe2(SO4)3, NaOH, NaClO, and reaction temperature on the yield of Na2FeO3. The findings reveal that the optimal conditions for preparation are as follows: [Fe2(SO4)3] = 0.67 mol/L, [NaClO] = 0.68 mol/L, [NaOH] = 7.5 mol/L, with a reaction temperature of 80°C. Under these conditions, the maximum yield of Na2FeO3 reaches 0.57 mol/L. The study offer crucial theoretical support for the large-scale production of Na2FeO3, contributing to advancements in water purification technology. Additionally, quinoline yellow degradation experiments were conducted, which demonstrated that under conditions where the addition amount was the same at 0.03mol/L, the TOC removal rate reached 53.63% within 60 min, which was superior to K2FeO4 © 2023, The Authors. All rights reserved.

关键词： Iron compounds

Enhancing rice production sustainability and resilience via reactivating small water bodies for irrigation and drainage (vol 14, 3794, 2023)

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NATURE COMMUNICATIONS 2023年第1期14卷 1-11页

作者： Li, Sisi Zhuang, Yanhua Liu, Hongbin Wang, Zhen Zhang, Fulin Lv, Mingquan Zhai, Limei Fan, Xianpeng Niu, Shiwei Chen, Jingrui Xu, Changxu Wang, Na Ruan, Shuhe Shen, Wangzheng Mi, Menghan Wu, Shengjun Du, Yun Zhang, Liang Hubei Provincial Engineering Research Center of Non-Point Source Pollution Control Innovation Academy for Precision Measurement Science and Technology Chinese Academy of Sciences Wuhan 430077 PR China Key Laboratory for Environment and Disaster Monitoring and Evaluation of Hubei Wuhan 430077 PR China University of Chinese Academy of Sciences Beijing 100049 PR China Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing 100081 PR China State Environmental Protection Key Laboratory of Soil Health and Green Remediation Huazhong Agricultural University Wuhan 430070 PR China Interdisciplinary Research Center for Territorial Spatial Governance and Green Development Huazhong Agricultural University Wuhan 430070 PR China Institute of Plant Protection Soil and Fertilizer Sciences Hubei Academy of Agricultural Sciences Wuhan 430064 PR China Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences Chongqing 400714 PR China Liaoning Academy of Agricultural Sciences Shenyang 110161 PR China Institute of Soil & Fertilizer and Resources & Environment Jiangxi Academy of Agricultural Sciences Nanchang 330200 PR China

Rice farming threatens freshwater resources, while also being increasingly vulnerable to drought due to climate change. Rice farming needs to become more sustainable and resilient to climate change by improving irrigation drainage systems. Small water bodies, used to store drainage water and supply irrigation in traditional rice farming systems have gradually been abandoned in recent decades. This has resulted in a higher water footprint (WF) associated with rice farming due to increased freshwater usage and wastewater release, also leaving rice production more vulnerable to extreme weather events. Here, we propose how protecting and reactivating small water bodies for rice irrigation and drainage can decrease rice production WF in China by 30%, save 9% of China’s freshwater consumption, increase irrigation self-sufficiency from 3% to 31%, and alleviate yield loss in dry years by 2–3%. These findings show that redesigning rice irrigation drainage systems can help meet water scarcity challenges posed by climate change.

关键词： environmental health Hydrology Wetlands ecology

Genomic basis of evolutionary adaptation in a warm-blooded fish

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The Innovation 2022年第1期3卷 22-30页

作者： Xin Wang Meng Qu Yali Liu Ralf F.Schneider Yue Song Zelin Chen Hao Zhang Yanhong Zhang Haiyan Yu Suyu Zhang Dongxu Li Geng Qin Shaobo Ma Jia Zhong Jianping Yin Shuaishuai Liu Guangyi Fan Axel Meyer Dazhi Wang Qiang Lin CAS Key Laboratory of Tropical Marine Bio-resources and Ecology South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou 511458China Marine Evolutionary Ecology GEOMAR Helmholtz Centre for Ocean Research Kiel24105 KielGermany BGI-Qingdao Qingdao 266555China State Key Laboratory of Marine Environmental Science/College of the Environment and Ecology Xiamen UniversityXiamen 361102China BGI-Shenzhen Shenzhen 518083China Department of Biology University of KonstanzKonstanz 78464Germany University of the Chinese Academy of Sciences Beijing 100101China Laboratory for Marine Fisheries Science and Food Production Processes Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China

Few fishes have evolved elevated body temperatures compared with ambient temperatures,and only in opah(Lampris spp)is the entire body *** understand the molecular basis of endothermy,we analyzed the opah genome and identified 23 genes with convergent amino acid substitutions across fish,birds,and mammals,including slc8b1,which encodes the mitochondrial Na+/Ca2+exchanger and is essential for heart function andmetabolic heat *** endothermic fishes,44 convergent genes with suggestive metabolic functions were identified,such as glrx3,encoding a crucial protein for hemoglobin *** genes involved in the production and retention of metabolic heat were also found to be under positive *** of opah’s unique inner-heat-producing pectoral muscle layer(PMI),an evolutionary key innovation,revealed that many proteins were co-opted from dorsal swimming muscles for thermogenesis and oxidative ***,the opah genome provides valuable resources and opportunities to uncover the genetic basis of thermal adaptations in fish.

关键词： evolutionary fish convergent

Construction of Covalent Organic Frameworks Membranes in Situ Through Phase Transformation for Fast and Accurate Nanofiltration

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SSRN 2023年

作者： Liu, Yu Xiang Chen, Jian Hua Qin, Na Gao, Ding Ling Zhang, Ya Yuan Yang, Qian College of Chemistry Chemical Engineering and Environment Minnan Normal University Zhangzhou363000 China Fujian Province University Key Laboratory of Modern Analytical Science and Separation Technology Minnan Normal University Zhangzhou363000 China

With the development of covalent organic frameworks (COFs), their superior separation performance in membrane separation has gradually becoming apparent. The method of combining covalent organic frameworks with membrane materials is crucial for their applications prospect. In this study, inspired from the traditional Chinese mortise and tenon structure, we selected 1,3,5-triacetaldehyde mesityl phenol (TFP) and 1,3,5-tris(4-aminophenyl)benzene (TAPB) as the reactive building monomers. p-phenylenediamine (PDA) was introduced into the casting solution to construct Polyether-sulfone (PES) bottom membranes with amino ligand sites by utilizing the phase transition effect generated by the non-invasive solvent-induced method (NIPS). We then prepared COFs composite nanofiltration membranes with two-dimensional layered structures through mild interfacial polymerization (IP) under optimized reaction conditions. The synthesis of the COFs composite nanofiltration membranes was demonstrated by a series of characterizations such as scanning transmission electron microscopy and infrared spectroscopy. The COFs composite nanofiltration membranes synthesized by this method were more aligned, chemically more stable, and had a greater separation efficiency compared with the traditional interracially polymerized COFs composite nanofiltration membranes. Since the method is in the form of adding additives, the method can be more widely applied to a wide range of organic polymer membranes. Furthermore, we demonstrated that the COF composite nanofiltration membranes produced using this method performed effectively in the separation of molecular dyes. They exhibit retention rates of over 99% for 0.1 g L-1 methyl blue (MB), Congo red (CR) and chrome black-T (EBT). Moreover, they achieve separation fluxes up to 300 L m-2 h-1 bar-1 for mixed solutions (dyes/salts), and can be used under extreme conditions, such as 1M HCl/NaOH. In addition, COFs-NH2PES composite nanofiltration membranes exhibit

关键词： Nanofiltration