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Microplastics enhance the adsorption capacity of zinc oxide nanoparticles:Interactive mechanisms and influence factors

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Journal of environmental Sciences 2025年第1期147卷 665-676页

作者： Weiping Xiong Min Hu Siying He Yuhang Ye Yinping Xiang Haihao Peng Zhaomeng Chen Zhengyong Xu Honglin Zhang Weixiang Li Shudian Peng college of environmental Science and engineering Hunan University and Key Laboratory of Environmental Biology and Pollution Control(Hunan University)Ministry of EducationChangsha 410082China Hunan Boke environmental engineering co.ltd. Hengyang 421099China college of environmental Protection and Safety engineering University of South ChinaHengyang 421001China Hunan Modern environmental Technology co.ltd. Changsha 410004China

Microplastics(MPs)are of particular concern due to their ubiquitous occurrence and propensity to interact and concentrate various waterborne contaminants from aqueous *** on the interaction and joint toxicity of MPs on engineered nanoparticles(ENPs)are exhaustive,but limited research on the effect of MPs on the properties of ENPs in multisolute ***,the effect of MPs on adsorption ability of ENPs to antibiotics was investigated for the first *** results demonstrated that MPs enhanced the adsorption affinity of ENPs to antibiotics and MPs before and after aging showed different effects on *** polyamide prevented aggregation of ZnONPs by introducing negative charges,whereas virgin polyamide affected ZnONPs with the help of electrostatic ***-IR and XPS analyses were used to probe the physicochemical interactions between ENPs and *** results showed no chemical interaction and electrostatic interactionwas the dominant force between ***,the adsorption rate of antibiotics positively correlated with pH and humic acid but exhibited a negative correlation with ionic *** study highlights that ENPs are highly capable of accumulating and transporting antibiotics in the presence of MPs,which could result in a widespread distribution of antibiotics and an expansion of their environmental risks and toxic effects on *** also improves our understanding of the mutual interaction of various co-existing contaminants in aqueous environments.

关键词： Microplastics Engineered nanoparticles Adsorption Tetracycline

Bioenergy recovery and carbon emissions benefits of short-term bio-thermophilic pretreatment on low organic sewage sludge anaerobic digestion:A pilot-scale study

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Journal of environmental Sciences 2025年第2期148卷 321-335页

作者： Hui Wang Xiang Fu Haozhe Huang Danni Shen Dongdong Fan Liming Zhu Xiaohu Dai Bin Dong college of environmental Science and engineering Tongji UniversityShanghai 200092China Yangtze Eco-environment engineering Research Center China Three Gorges CorporationBeijing 100038China Yangtze River Eco-environmental engineering Research Center Shanghai InvestigationDesign and Research Institute Co.LTDShanghai 200092China china construction Third engineering Bureau First engineering co. Ltd.Wuhan 430000China

Sewage sludge in cities of Yangzi River Belt,china,generally exhibits a lower organic content and higher silt contentdue to leakage of drainage system,which caused low bioenergy recovery and carbon emission benefits in conventional anaerobic digestion(CAD).Therefore,this paper is on a pilot scale,a bio-thermophilic pretreatment anaerobic digestion(BTPAD)for low organic sludge(volatile solids(VS)of 4%)was operated with a long-term continuous flow of 200 *** VS degradation rate and CH_(4) yield of BTPAD increased by 19.93%and 53.33%,respectively,compared to those of *** analysis of organic compositions in sludge revealed that BTPAD mainly improved the hydrolysis of proteins in *** analysis of microbial community proportions by high-throughput sequencing revealed that the short-term bio-thermophilic pretreatment was enriched in Clostridiales,coprothermobacter and Gelria,was capable of hydrolyzing acidified proteins,and provided more volatile fatty acid(VFA)for the subsequent *** combined with fluorescence quantitative polymerase chain reaction(PCR)analysis showed that the number of bacteria with high methanogenic capacity in BTPAD was much higher than that in CAD during the medium temperature digestion stage,indicating that short-term bio-thermophilic pretreatment could provide better methanogenic conditions for ***,the greenhouse gas emission footprint analysis showed that short-term bio-thermophilic pretreatment could reduce the carbon emission of sludge anaerobic digestion system by 19.18%.

关键词： Sludge Anaerobic digestion Bio-thermophilic pretreatment Pilot scale Molecular microbiology Carbon emissions

Model tests and numerical analysis of emergency treatment of cohesionless soil landslide with quick-setting polyurethane

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Journal of Mountain Science 2025年第1期22卷 110-121页

作者： ZHANG Zhichao TANG Xuefeng HUANG Rufa CAI Zhenjie GAO Anhua Key Laboratory of Geohazard Prevention of Hilly Mountains Ministry of Natural Resources of ChinaFuzhou 350002China Technology Innovation Center for Monitoring and Restoration engineering of Ecological Fragile Zone in Southeast china Ministry of Natural ResourcesFuzhou 350001China Fujian construction Research engineering consulting co. Ltd.Fuzhou 350100China Xin Zhongkun construction engineering co. LTDLongyan 364399China Fujian Jiakang construction engineering co. LTDLongyan 364199China

Shotcrete is one of the common solutions for shallow *** works by forming a protective layer with high strength and cementing the loose soil particles on the slope surface to prevent shallow ***,the solidification time of conventional cement paste is long when shotcrete is used to treat cohesionless soil *** idea of reinforcing slope with polyurethane solidified soil(i.e.,mixture of polyurethane and sand)was *** tests and finite element analysis were carried out to study the effectiveness of the proposed new method on the emergency treatment of cohesionless soil *** loading on the crest of the slope was applied step by step until landslide was triggered so as to test and compare the stability and bearing capacity of slope models with different *** simulated slope displacements were relatively close to the measured results,and the simulated slope deformation characteristics were in good agreement with the observed phenomena,which verifies the accuracy of the numerical *** the condition of surcharge loading on the crest of the slope,the unreinforced slope slid when the surcharge loading exceeded 30 k Pa,which presented a failure mode of local instability and collapse at the shallow layer of slope *** reinforced slope remained stable even when the surcharge loading reached 48 k *** displacement of the reinforced slope was reduced by more than 95%.Overall,this study verifies the effectiveness of polyurethane in the emergency treatment of cohesionless soil landslide and should have broad application prospects in the field of geological disasters concerning the safety of people's live.

关键词： cohesionless soil landslide Polyurethane Emergency treatment Reinforcement effect Model test Finite element analysis

Short-Term Photovoltaic power Prediction Based onMulti-Stage Temporal Feature Learning

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Energy engineering 2025年第2期122卷 747-764页

作者： Qiang Wang Hao Cheng Wenrui Zhang Guangxi Li Fan Xu Dianhao Chen Haixiang Zang Jiangsu Qitian power construction Group co. Ltd.Lianyungang222000China Lianyungang Zhiyuan Electricity Design co. Ltd.Lianyungang222000China Lianyungang power Supply company State Grid Jiangsu Electric Power Co.Ltd.Lianyungang222000China School of Electrical and power engineering Hohai UniversityNanjing210098China

Harnessing solar power is essential for addressing the dual challenges of global warming and the depletion of traditional energy ***,the fluctuations and intermittency of photovoltaic(PV)power pose challenges for its extensive incorporation into power ***,enhancing the precision of PV power prediction is particularly *** existing studies have made progress in short-term prediction,issues persist,particularly in the underutilization of temporal features and the neglect of correlations between satellite cloud images and PV power *** factors hinder improvements in PV power prediction *** overcome these challenges,this paper proposes a novel PV power prediction method based on multi-stage temporal feature ***,the improved LSTMand SA-convLSTMare employed to extract the temporal feature of PV power and the spatial-temporal feature of satellite cloud images,***,a novel hybrid attention mechanism is proposed to identify the interplay between the two modalities,enhancing the capacity to focus on the most relevant ***,theTransformermodel is applied to further capture the short-termtemporal patterns and long-term dependencies within multi-modal feature *** paper also compares the proposed method with various competitive *** experimental results demonstrate that the proposed method outperforms the competitive methods in terms of accuracy and reliability in short-term PV power prediction.

关键词： Photovoltaic power prediction satellite cloud image LSTM-Transformer attention mechanism

Novel Low-Carbon Optimal Operation Method for Flexible Distribution Network Based on Carbon Emission Flow

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Energy engineering 2025年第2期122卷 785-803页

作者： Chao Gao Kai Niu Wenjing Chen Changwei Wang Yabin Chen Rui Qu Guangdong-Hong Kong-Macao Greater Bay Area construction Promotion Office of Guangdong power Grid co. Ltd.Guangzhou510030China School of Electrical engineering Northeast Electric Power UniversityJilin132012China School of Electrical engineering Fuzhou UniversityFuzhou350116China

With the widespread implementation of distributed generation(DG)and the integration of soft open point(SOP)into the distribution network(DN),the latter is steadily transitioning into a flexible distribution network(FDN),the calculation of carbon flow distribution in FDN is more *** this end,this study constructs a model for low-carbon optimal operations within the FDN on the basis of enhanced carbon emission flow(CEF).First,the carbon emission characteristics of FDNs are scrutinized and an improved method for calculating carbon flow within these networks is ***,a model for optimizing low-carbon operations within FDNs is formulated based on the refined CEF,which merges the specificities of DG and intelligent ***,this model is scrutinized using an upgraded IEEE 33-node distribution system,a comparative analysis of the cases reveals that when DG and SOP are operated in a coordinated manner in the FDN,with the cost of electricity generation was reduced by 40.63 percent and the cost of carbon emissions by 10.18 *** findings indicate that the judicious optimization of areas exhibiting higher carbon flow rates can effectively enhance the economic efficiency of DN operations and curtail the carbon emissions of the overall network.

关键词： Flexible distribution network carbon emission flow distributed generation soft open points

Prioritization Hindsight Experience Based on Spatial Position Attention for Robots

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Machine Intelligence Research 2025年第1期22卷 160-175页

作者： Ye Yuan Yu Sha Feixiang Sun Haofan Lu Shuiping Gou Jie Luo china Nuclear power Technology Research Institute co. Ltd.Shenzhen518028China School of Artificial Intelligence Xidian UniversityXi’an710071China Suzhou Tianhe china power International engineering Technology co. Ltd.Suzhou215000China

Sparse rewards pose significant challenges in deep reinforcement learning as agents struggle to learn from experiences with limited reward *** experience replay(HER)addresses this problem by creating“small goals”within a hierarchical decision ***,HER does not consider the value of different episodes for agent *** this paper,we propose SPAHER,a framework for prioritizing hindsight experiences based on spatial position *** allows the agent to prioritize more valuable experiences in a manipulation *** achieves this by calculating transition and trajectory spatial position functions to determine the value of each episode for experience *** evaluate SPAHER on eight robot manipulation tasks in the Fetch and Hand environments provided by OpenAI *** results show that our method improves the final mean success rate by an average of 3.63%compared to HER,especially in challenging Hand ***,these improvements are achieved without any increase in computation time.

关键词： Hindsight experience replay spatial position attention sparse reward deep reinforcement learning prioritization hindsight experience

Insight into the bimetallic structure sensibility of catalytic nitrate reduction over Pd-Cu nanocrystals

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Journal of environmental Sciences 2025年第3期149卷 221-233页

作者： Zhiqiang Zhang Wenhang Li Cailin Zheng Kunyu Chen Heliang Pang Wenxin Shi Jinsuo Lu School of environmental and Municipal engineering Xi’an University of Architecture and TechnologyXi’an 710055China Key Laboratory of Northwest Water Resources Environment and EcologyMinistry of EducationXian 710055China State Key Laboratory of Urban Water Resource and environment Harbin Institute of TechnologyHarbin 150090China construction engineering quality and safety supervision center station House and Urban Rural Development Department of AnkangAnkang 725000China college of Urban construction and environmental engineering Chongqing UniversityChongqing 400044China

Catalytic reduction of nitrate over bimetallic catalysts has emerged as a technology for sustainable treatment of nitrate-containing ***,the structure of bimetallic has been much less investigated for catalyst ***,two main types of Pd-Cu bimetallic nanocrystal structures,heterostructure and intermetallic,were prepared and characterized using high-resolution transmission electron microscopy(HRTEM),X-ray diffraction(XRD),and X-ray photoelectron spectroscopy(XPS).The results show that two individual Pd and Cu nanocrystals with a mixed interface exist in the heterostructure nanocrystals,while Pd and Cu atoms are uniformly distributed across the intermetallic Pd-Cu *** catalytic nitrate reduction experiments were carried out in a semibatch reactor under constant hydrogen *** nitrate conversion rate of the heterostructure Pd-Cu nanocrystals supported onα-Al_(2)O_(3),γ-Al_(2)O_(3),SBA-15,and XC-72R exhibited 3.82-,6.76-,4.28-,2.44-fold enhancements relative to the intermetallic nanocrystals,and the nitrogen and nitrite were the main products for the heterostructure and intermetallic Pd-Cu nanocrystals,*** indicates that the catalytic nitrate reduction over Pd-Cu catalyst is sensitive to the bimetallic structures of the catalysts,and heterostructure bimetallic nanocrystals exhibit better catalytic performances on both the activity and selectivity,which may provide new insights into the design and optimization of catalysts to improve catalytic activity and selectivity for nitrate reduction in water.

关键词： Catalytic nitrate reduction Pd-Cu bimetallic catalyst Heterostructure Intermetallic Activity and selectivity

Study on discharge characteristics of low-temperature sub-atmospheric pressure under steep change rate voltage

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Plasma Science and Technology 2025年第1期27卷 52-61页

作者： Bo ZHU Ximu HAN He SU Xiangjie MA Guoyan WU MOE Key Laboratory of engineering Dielectrics and its Application Harbin University of Science and TechnologyHarbin 150080People’s Republic of China Huaneng Guanyun Clean Energy power Generation co.ltd. Lianyungang 222228People’s Republic of China

Aiming at the gas discharge problem in electric aircraft,this work studies the gas discharge characteristics at low-temperature sub-atmospheric pressure.A gas discharge shooting platform was built,and the discharge process was photographed by intensified charge-coupled device(ICCD).A two-dimensional axisymmetric model of needle-plate electrode gas discharge was established,and three sets of Helmholtz equations were used to solve the *** results show that under the same voltage,the electric field intensity in the discharge process increases first,then decreases and finally increases *** discharge speed increases with the increase of altitude,and the electron density in the streamer decreases with the increase of *** development speed of the streamer in the middle stage is higher than that in the early stage,and the speed increases more obviously with the increase of *** development speed of the streamer in the later stage is lower than that in the middle stage,but with the increase of altitude,the development speed of the streamer in the later stage is higher than that in the middle stage.

关键词： electric aircraft gas discharge steep change rate voltage electric field intensity electron density

Turbulent Agglomeration of Microparticles in a Cylinder Wake Flow Using LES-DEM:Focusing on the Effect of the Reynolds Number

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Journal of Thermal Science 2025年第1期34卷 34-49页

作者： WANG Shuang MU Lin LI Xue XIE Jun DONG Ming School of Energy and power engineering Dalian University of TechnologyDalian 116024China School of Optical Information and Energy engineering Wuhan Institute of TechnologyWuhan 430205China School of Energy and environment Shenyang Aerospace UniversityShenyang 110136China

Turbulent agglomeration is viewed as a promising technology for enhancing fine particle removal *** better understand particle transport,agglomeration behaviors,and fluid-particle interactions,we numerically explored these phenomena under cylindrical vortex wake influence using a coupled large eddy simulation and discrete element method(LES-DEM)*** validity of the LES approach was verified by comparison with available direct numerical simulation(DNS)*** adopted the Johnson-Kendall-Roberts(JKR)contact model for particle-particle *** particle dispersion and agglomeration characteristics of particles with different diameters(d_(p)=2-20μm)in the laminar and transition of shear layer(TrSL)flow regimes were *** particles were concentrated at the vortex centers,while larger particles accumulated around the *** agglomeration efficiency exhibited an M-shaped profile spanwise(y-direction).With increasing Reynolds number,the agglomeration efficiency and turbulence intensity *** particle agglomeration efficiency peaks at a certain Reynolds ***,at higher Reynolds numbers,reducing the residence time of particles in the flow field decreases the agglomeration efficiency.

关键词： microparticle particle agglomeration discrete element method large eddy simulation