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Plant-substrate biochar properties critical for mediating reductive debromination of 1,2-dibromoethane

Journal of environmental Sciences 2025年第1期147卷 1-10页

作者： Jonathan H.Lindhardt Peter E.Holm Yong-Guan Zhu Changyong Lu Hans Christian B.Hansen Department of Plant and environmental Sciences Faculty of ScienceUniversity of CopenhagenThorvaldsensvej 401871 Frederiksberg CDenmark Key lab of Urban environment and Health Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China Sino-Danish Center for education and research China and DenmarkDalgas Avenue 4DK-8000 Aarhus C.Denmark

Dibromoethane is a widespread,persistent organic *** are known mediators of reductive dehalogenation by layered Fe^(Ⅱ)-Fe^(Ⅲ)hydroxides(green rust),which can reduce 1,2-dibromoethane to innocuous bromide and ***,the critical characteristics that determine mediator functionality are lesser *** biochar substrates were pyrolyzed at 600℃and 800℃,characterized by elemental analysis,X-ray photo spectrometry C and N surface speciation,X-ray powder diffraction,specific surface area analysis,and tested for mediation of reductive debromination of 1,2-dibromoethane by a green rust reductant under anoxic conditions.A statistical analysis was performed to determine the biochar properties,critical for debromination kinetics and total debromination *** was shown that selected plant based biochars can mediate debromination of 1,2-dibromoethane,that the highest first order rate constant was 0.082/hr,and the highest debromination extent was 27%in reactivity experiments with 0.1μmol(20μmol/L)1,2-dibromoethane,≈22 mmol/L Fe^(Ⅱ)GR,and 0.12 g/L soybean meal biochar(7 days).Contents of Ni,Zn,N,and P,and the relative contribution of quinone surface functional groups were significantly(p<0.05)positively correlated with 1,2-dibromoethane debromination,while adsorption,specific surface area,and the relative contribution of pyridinic N oxide surface groups were significantly negatively correlated with debromination.

关键词： environmental remediation Biochar Persistent organic pollutants(POPs) environmental catalysis Green rust

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The global 64-year sea level oscillation and its possible external excitation sources

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Science China Earth Sciences 2025年第3期68卷 898-908页

作者： Mingyu XIAO Taoyong JIN Hao DING Lianjun YANG Xiaolong LI Jiancheng LI School of Geodesy and Geomatics Wuhan University MOE Key Laboratory of Geospace environment and Geodesy Wuhan University

Low-frequency signals play an important role in understanding sea level changes and their acceleration. This paper analyzed multidecadal oscillations on a global scale with tide gauge records. A significant stable oscillation of approximately64 years was identified at 177 globally distributed tide gauges, with an estimated period of 63±4 yr. The amplitude of this oscillation depends on latitude, whereas the phase depends on longitude. The regions most affected(up to ～20 mm) by the 64-yr oscillation include Europe, North America, South Australia, and East Asia. Our results are consistent with the spherical harmonic model, indicating that the 64-yr oscillation is not a random or irregular signal but rather a global signal likely excited by a specific source. To explore the possible excitation sources, we analyzed several external factors closely related to sea level change(where“external” refers to factors relative to the Earth's interior), including thermosteric sea level, ocean mass change, precipitation, sea level pressure, surface temperature, sunspot numbers, solar flux, and the total solar irradiance index. Our results show that there are significant differences in the periods, amplitudes and phases of the multidecadal characteristics of these datasets from those of the 64-yr oscillation; thus the existence of the 64-yr oscillation was denied in these datasets. Therefore, we firstly confirm that climate change and solar activity cannot explain the 64-yr sea level oscillation.

关键词： Sea level change 64-year oscillation Tide gauge records Solar activity Climate change

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Investigation of spatiotemporal distribution and formation mechanisms of ozone pollution in eastern Chinese cities applying convolutional neural network

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Journal of environmental Sciences 2025年第2期148卷 126-138页

作者： Qiaoli Wang Dongping Sheng Chengzhi Wu Xiaojie Ou Shengdong Yao Jingkai Zhao Feili Li Wei Li Jianmeng Chen 无 College of environment Zhejiang University of TechnologyHangzhou 310032China Key Laboratory of Biomass Chemical Engineering of the Ministry of Education Institute of Industrial Ecology and EnvironmentCollege of Chemical and Biological EngineeringZhejiang University(Zijingang Campus)Hangzhou 310027China Trinity Consultants Inc.(China office)Hangzhou 310012China Zhejiang University of Science&Technology Hangzhou 310023China

Severe ground-level ozone(O_(3))pollution over major Chinese cities has become one of the most challenging problems,which have deleterious effects on human health and the sustainability of *** study explored the spatiotemporal distribution characteristics of ground-level O_(3) and its precursors based on conventional pollutant and meteorological monitoring data in Zhejiang Province from 2016 to ***,a high-performance convolutional neural network(CNN)model was established by expanding the moment and the concentration variations to general ***,the response mechanism of O_(3) to the variation with crucial influencing factors is explored by controlling variables and interpolating target *** results indicated that the annual average MDA8-90th concentrations in Zhejiang Province are higher in the northern and lower in the *** the wind direction(WD)ranges from east to southwest and the wind speed(WS)ranges between 2 and 3 m/sec,higher O_(3) concentration prone to *** different temperatures(T),the O_(3) concentration showed a trend of first increasing and subsequently decreasing with increasing NO_(2) concentration,peaks at the NO_(2) concentration around 0.02mg/m^(3).The sensitivity of NO_(2) to O_(3) formation is not easily affected by temperature,barometric pressure and dew point ***,there is a minimum IRNO_(2) at each temperature when the NO_(2) concentration is 0.03 mg/m^(3),and this minimum IRNO_(2) decreases with increasing *** study explores the response mechanism of O_(3) with the change of driving variables,which can provide a scientific foundation and methodological support for the targeted management of O_(3) pollution.

关键词： Ozone Spatiotemporal distribution Convolutional neural network Ozone formation rules Incremental reactivity

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Abiotic aerobic oxidation pathways of stibnite revealed by oxygen and sulfur isotope systematics of sulfate

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Journal of environmental Sciences 2025年第1期147卷 83-92页

作者： Ningjie He Shu Li Xiaoqian Li Yaning Tang Jiaxue Yang Jianwei Zhou School of environment Studies China University of GeosciencesWuhan 430074China Key Laboratory of Mine Ecological Effects and Systematic Restoration Ministry of Natural ResourcesBeijing 100081China State environmental Protection Key Laboratory of Source Apportionment and Control of Aquatic Pollution Ministry of Ecology and EnvironmentWuhan 430074China Institute of Geological Survey China University of GeosciencesWuhan 430074China

The environmental threat posed by stibnite is an important geoenvironmental issue of current *** better understand stibnite oxidation pathways,aerobic abiotic batch experiments were conducted in aqueous solution with varyingδ^(18)O_(H_(2)O) value at initial neutral pH for different lengths of time(15-300 days).The sulfate oxygen and sulfur isotope compositions as well as concentrations of sulfur and antimony species were *** sulfur isotope fractionation factor(△^(34)S_(SO4-stibnite))values decreased from 0.8‰to-2.1‰during the first 90 days,and increased to 2.6‰at the 180 days,indicating the dominated intermediate sulfur species such as S_(2)O_(3)^(2-),S0,and H_(2)S(g)involved in Sb2S3 oxidation *** incorporation of O into sulfate derived from O_(2)(~100%)indicated that the dissociated O_(2)was only directly adsorbed on the stibnite-S sites in the initial stage(0-90 days).The proportion of O incorporation into sulfate from water(27%-52%)increased in the late stage(90-300 days),which suggested the oxidation mechanism changed to hydroxyl attack on stibnite-S sites promoted by nearby adsorbed O_(2)on stibnite-Sb *** exchange of oxygen between sulfite and water may also contributed to the increase of water derived O into SO42-.The new insight of stibnite oxidation pathway contributes to the understanding of sulfide oxidation mechanism and helps to interpret field data.

关键词： Sulfide oxidation δ^(34)S_(SO4) δ^(18)O_(SO4) Oxygen source of sulfate

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Interpreting hourly mass concentrations of PM_(2.5)chemical components with an optimal deep-learning model

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Journal of environmental Sciences 2025年第5期151卷 125-139页

作者： Hongyi Li Ting Yang Yiming Du Yining Tan Zifa Wang State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry(LAPC) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Center for Excellence in Regional Atmospheric environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China University of Chinese Academy of Sciences Beijing 100049China Shenyang environmental Monitoring Center Shenyang 110167China

PM_(2.5)constitutes a complex and diversemixture that significantly impacts the environment,human health,and climate ***,existing observation and numerical simulation techniques have limitations,such as a lack of data,high acquisition costs,andmultiple *** limitations hinder the acquisition of comprehensive information on PM_(2.5)chemical composition and effectively implement refined air pollution protection and control *** this study,we developed an optimal deep learning model to acquire hourly mass concentrations of key PM_(2.5)chemical components without complex chemical *** model was trained using a randomly partitioned multivariate dataset arranged in chronological order,including atmospheric state indicators,which previous studies did not *** results showed that the correlation coefficients of key chemical components were no less than 0.96,and the root mean square errors ranged from 0.20 to 2.11μg/m^(3)for the entire process(training and testing combined).The model accurately captured the temporal characteristics of key chemical components,outperforming typical machine-learning models,previous studies,and global reanalysis datasets(such asModern-Era Retrospective analysis for Research and Applications,Version 2(MERRA-2)and Copernicus Atmosphere Monitoring Service ReAnalysis(CAMSRA)).We also quantified the feature importance using the random forest model,which showed that PM_(2.5),PM_(1),visibility,and temperature were the most influential variables for key chemical *** conclusion,this study presents a practical approach to accurately obtain chemical composition information that can contribute to filling missing data,improved air pollution monitoring and source *** approach has the potential to enhance air pollution control strategies and promote public health and environmental sustainability.

关键词： Pm2.5 chemical composition Hourly mass concentration Deep learning Bayesian optimization Feature importance

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Pilot-scale testing on catalytic hydrolysis of carbonyl sulfur combined with absorption-oxidation of H_(2)S for blast furnace gas purification

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Journal of environmental Sciences 2025年第5期151卷 360-372页

作者： Yuting Lin Yuran Li Bin Wang Jinglei Tian Hongqiang Liu Yiren Li Zhicheng Xu Qiang Cao Tingyu Zhu CAS Key Laboratory of Green Process and Engineering Institute of Process EngineeringInnovation Academy for Green ManufactureChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100190China HBIS Group Co. Ltd.Shijiazhuang 050023China Center for Excellence in Regional Atmospheric environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China

About 70%of the flue gas in the iron-steel industry has achieved multi-pollutant ultra-low emissions in China until 2023,and then the blast furnace gas purification has become the control step and *** research group has designed and constructed the world’s first blast furnace gas desulfurization pilot plant with the scale of 2000 Nm^(3)/h in October *** pilot plant is a two-step combined desulfurization device including catalytic hydrolysis of carbonyl sulfur(COS)and absorption-oxidation of H_(2)S,continuously running for 120 *** the hydrolysis system,one reason for catalyst deactivation has been verified from the sulfur *** in blast furnace gas can be hydrolyzed on the hydrolysis catalyst to produce the nitrogen deposition,which is one of the reasons for catalyst deactivation and has never been found in previous *** deposition forms of S and N elements are determined,S element forms elemental sulfur and sulfate,while N element forms-NH_(2)and NH_(4)^(+).In the absorption-oxidation system,the O_(2)loading and the residence time have been optimized to control the oxidation of HS^(−)to produce elemental sulfur instead of by-product S_(2)O_(3)^(2−).The balance and distribution of S and N elements have been calculated for thewholemulti-phase system,approximately 84.4%of the sulfur is converted to solid sulfur product,about 1.3%of the sulfur and 19.2%of N element are deposited on the hydrolysis *** pilot plant provides technical support formulti-pollutant control of blast furnace.

关键词： Blast furnace gas Carbonyl sulfur Hydrogen sulfide Hydrogen cyanide Hydrolysis and oxidation Activated carbon

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Impact of aerosol-radiation interaction and heterogeneous chemistry on the winter decreasing PM_(2.5)and increasing O_(3)in Eastern China 2014–2020

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Journal of environmental Sciences 2025年第5期151卷 469-483页

作者： Yasong Li Tijian Wang Qin’geng Wang Mengmeng Li Yawei Qu Hao Wu Min Xie School of the environment Nanjing UniversityNanjing 210023China School of Atmospheric Sciences Nanjing UniversityNanjing 210023China College of Intelligent Science and Control Engineering Jinling Institute of TechnologyNanjing 211169China Key Laboratory of Transportation Meteorology of China Meteorological Administration Nanjing Joint Institute for Atmospheric SciencesNanjing 210041China School of environment Nanjing Normal UniversityNanjing 210023China

In the context of the prevalent winter air quality issues in China marked by declining PM_(2.5)and rising O_(3),this study employed amodified WRF-Chem model to examine the aerosol radiation interaction(ARI),heterogeneous chemistry(AHC),and their combined impact(ALL)on the variations in O_(3)and PM_(2.5)during the 2014–2020 in eastern *** analysis confirmed that ARI curtailed O_(3)while elevating PM_(2.5).AHC reduced O_(3)through heterogeneous absorption of NOx and hydroxideswhile notably fostering fine-grained sulfate,resulting in a PM_(2.5)*** reductions mitigated the inhibitory impact of ARI on meteorological fields and photolysis *** reduction individually without aerosol feedback led to a 5.43 ppb O_(3)increase and a 22.89μg/m^(3)PM_(2.5)*** and AHC amplified the emission-reduction-induced(ERI)O_(3)rise by 1.83 and 0.31 ppb,*** response of ARI to emission diminution brought about a modest PM_(2.5)increase of 0.31μg/m^(3).Conversely,AHC,acting as the primary contributor,caused a noteworthy PM_(2.5)decrease of 4.60μg/m^(3).As efforts concentrate on reducing PM_(2.5),the promotion of ARI on PM_(2.5)counterbalanced the efficacy of emission reduction and the AHC-induced strengthening of PM_(2.5)*** ALL magnified the ERI O_(3)increase by 38.9%and PM_(2.5)decrease by 18.7%.Sensitivity experiments with different degrees of emission reduction demonstrated a consistent linear relationship between the ALL-induced enhancement of O_(3)increase and PM_(2.5)decrease to the ERI PM_(2.5)*** investigation revealed the complex connection between emissions and aerosol feedback in influencing air quality.

关键词： Aerosol-radiation interaction Heterogeneous chemistry O_(3)increase PM_(2.5)decrease Emission reduction

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Factors Influencing Local Visitors’Willingness to Pay an Entrance Fee of the East Lake,Wuhan,China

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Journal of Resources and Ecology 2025年第1期16卷 73-80页

作者： Matthew Nitanan Koshy Department of environment Faculty of Forestry and EnvironmentUniversiti Putra MalaysiaSerdang 43400Malaysia

The infrastructure of East Lake has undergone a gradual process of degeneration,necessitating the allocation of adequate financial resources to ensure the preservation and sustenance of its ecological ***,insufficient funds for conservation and management pose a problem for the management of Urban East ***,the research aimed to(1)identify the local visitor’s satisfaction level with East Lake’s facilities and environmental quality;(2)determine the visitors’perception of the conservation and management aspect of East Lake;(3)identify factors influencing local visitors’willingness to pay an entrance fee to East Lake,and(4)estimate an appropriate entrance fee for East *** the Contingent Valuation Method,visitors'willingness to pay was *** accumulation of 449 samples was based on convenience *** results indicated that visitor satisfaction and attitude were both *** addition,respondents had a good perception on East ***,income,and education level were factors that substantially affected visitors’willingness to pay;however,only the visitor variable had a positive *** estimated entrance fee was 2 USD per individual per *** research’s findings provided significant policy and recommendations;they would serve as a baseline for the management to impose an entrance fee in East Lake.

关键词： contingent valuation method(CVM) satisfaction perception willingness to pay(WTP)

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Offload Strategy for Edge Computing in Satellite Networks Based on Software Defined Network

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Computers, Materials & Continua 2025年第1期82卷 863-879页

作者： Zhiguo Liu Yuqing Gui Lin Wang Yingru Jiang Communication and Network Laboratory Dalian UniversityDalian116622China College of environment and Chemical Engineering Dalian UniversityDalian116622China

Satellite edge computing has garnered significant attention from researchers;however,processing a large volume of tasks within multi-node satellite networks still poses considerable *** sharp increase in user demand for latency-sensitive tasks has inevitably led to offloading bottlenecks and insufficient computational capacity on individual satellite edge servers,making it necessary to implement effective task offloading scheduling to enhance user *** this paper,we propose a priority-based task scheduling strategy based on a Software-Defined Network(SDN)framework for satellite-terrestrial integrated networks,which clarifies the execution order of tasks based on their ***,we apply a Dueling-Double Deep Q-Network(DDQN)algorithm enhanced with prioritized experience replay to derive a computation offloading strategy,improving the experience replay mechanism within the Dueling-DDQN ***,we utilize the Deep Deterministic Policy Gradient(DDPG)algorithm to determine the optimal resource allocation strategy to reduce the processing latency of *** results demonstrate that the proposed d3-DDPG algorithm outperforms other approaches,effectively reducing task processing latency and thus improving user experience and system efficiency.

关键词： Satellite network edge computing task scheduling computing offloading

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Biochar,Properties and Skills with a Focus on Implications for Vineyard Land and Grapevine Performance

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Phyton-International Journal of Experimental Botany 2025年第1期94卷 33-64页

作者： Pamela Lippi Giovan Battista Mattii Eleonora Cataldo Department of Agriculture FoodEnvironment and Forestry(DAGRI)University of FlorenceSesto Fiorentino50019Italy

Biochar has emerged as a promising tool for enhancing vineyard sustainability by improving soil properties and mitigating climate change *** review highlights key findings on biochar’s role in viticulture,focusing on its effects on soil fertility,water retention,and plant *** and pot studies demonstrate that biochar amendments enhance soil structure,increase cation exchange capacity(CEC),and promote water availability,leading to improved drought resistance in ***,the impacts on grape yield,physiology,and quality remain inconclusive,with some studies reporting benefits while others show neutral *** research should focus on optimizing biochar application rates,understanding its interactions with soil microbiota,and assessing long-term impacts on grape production and wine ***,addressing potential risks,such as heavy metal contamination and changes in microbial communities,is crucial for its safe and effective *** review aims to supply a comprehensive assessment of our knowledge about the incidence and consequences of biochar on soil,including its potential use in soil remediation and concerns regarding its possible negative impacts,with a focus on its effects on vine physiology and grape production.

关键词： C sequestration charcoal climate change pyrolysis soil amendment soil remediation

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