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SSRN 2023年

作者： Li, Siling Chen, Junwen Zhao, Jian Qi, Weixiao Liu, Huijuan Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China

Understanding the response of the microbial community to external disturbances such as micropollutants is vital for ecological risk evaluation. In this study, the effect of chronic antibiotic exposure on community compositions and functions was investigated by two batch experiments. The first experiment investigated the effect of chronic sulfamethoxazole (SMX) exposure, while the second investigated the combined effect of dissolved organic matter (DOM) sources and multi-antibiotic exposure. The results showed that the community responses to chronic antibiotic exposure depended on the dynamic balance among community resistance, adaptation, recovery, and selection, leading to nonlinear composition diversity variations. The disturbance strength of chronic SMX exposure increased with concentration (0.5–50 μg/L). However, complex sources and structures of coexisting organic matter might delay the disturbance by elevating metabolic activity and generating functional redundancy. Especially, when nutrient was a limiting factor, the disturbance strength by DOM source was greater than that by chronic antibiotic exposure. The resistance of abundant taxa to external distributions resulted in a low explanation of community diversity, while rare taxa played key roles in response to community variation and thereby affected community assembly. Long-term SMX exposure reduced the number of key species and favored the deterministic assembly process by 21%. However, elevated community adaptability might weaken the influence of antibiotic selection. Chronic SMX exposure elevated the relative abundance of sulfonamide resistance genes (sul1, sul2) by a factor of 1.2–4.3, while that of nitrogen-fixing genes (nifH, nifK) and the metabolic pathways related to the toluene, ethylbenzene, and dioxin degradation decreased. However, the combined influence of DOM sources and multi-antibiotic exposure barely caused the difference in the genes linking to element metabolism and drug resistance of mic

关键词： Antibiotics

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Improved PM2.5 prediction with spatio-temporal feature extraction and chemical components: The RCG-attention model

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Science of the Total environment 2024年 955卷 177183页

作者： Li, Ao Wang, Yafei Qi, Qianqian Li, Yunfeng Jia, Haixia Zhou, Xin Guo, Haixin Xie, Shuyang Liu, Junfeng Mu, Yujing Beijing Institute of Petrochemical Technology China Beijing Daxing District Ecology and Environment Bureau China Agro-Environmental Protection Institute Ministry of Agriculture and Rural Affairs Tianjin300191 China State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-environmental Sciences Chinese Academy of Sciences Beijing100085 China State Key Joint Laboratory of Environment Simulation and Pollution Control College of Environmental Sciences and Engineering Peking University Beijing100871 China

Deep learning models are widely used for PM2.5 prediction. However, neglecting temporal and spatial characteristics leads to low prediction accuracy. In this work, a new deep learning model (RCG - Attention model) was developed, which combines the residual neural network (ResNet) and the convolution gated recurrent network (ConvGRU) and is applied to extract the spatio - temporal features for predicting PM2.5 concentration over the subsequent 24 h. The ResNet extracts the spatial distribution features of pollutants, and the ConvGRU extracts temporal features. The spatial and temporal features are fused by the multi - head attention mechanism to obtain multi - dimensional features. These features are finally fed into a series of fully connected layers to predict the future results. Incorporating these chemical components enhances the scientific validity of the dataset and strengthens the inherent logical connections among variables. The Mean Absolute Error (MAE), Mean Absolute Percentage Error (MAPE), Root Mean Square Error (RMSE), and R - squared (R2) results indicate that the prediction performance of the RCG - Attention model surpasses that of other baseline models. The model demonstrates superior prediction performance across multiple monitoring stations, suggesting robust generalization capabilities and adaptability for various regions in one city. The SHAP results show that PM10, NO2, RH, NO3−, OC and NH4+ are significant influencing features. The RCG - Attention model provides a comprehensive solution for PM2.5 concentration prediction by integrating spatial and temporal feature extraction with chemical components. © 2024 Elsevier B.V.

关键词： Prediction models

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Enhanced oil/water separation using superhydrophobic nano SiO2-modified porous melamine sponges

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Chemosphere 2024年 369卷 143879页

作者： Chen, Yongsheng Xue, Yi Ma, Sijia Shi, Haochuan Wang, Yanru Ren, Hongqiang Xu, Ke State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Jiangsu Nanjing210023 China

Recent advancements in functional sponge materials have garnered significant interest due to their efficacy and cost-effectiveness in oil spill remediation. This study introduces both silane coupling agent (methyltrichlorosilane and 3-aminopropyltriethoxysilane) and nano-SiO₂ particles into the melamine sponge framework via impregnation. Additionally, polydimethylsiloxane (PDMS) serves a crucial role in curing to fuse the substrate with the coating through robust covalent bonds. The modified sponges (SiMAPs) facilitate the formation of rough surfaces comprising hierarchical structures by the deposition of nano-SiO₂ particles, while the silane coupling agents and PDMS contribute to a reduced surface energy. These SiMAP sponges maintain high stability with a water contact angle of 162.6° and demonstrate an adsorption capacity ranging from 40 to 90 times their weight in oil or organic solvents. Furthermore, they achieve a separation efficiency exceeding 98% and an oil flux of 14.38 L/m2∙s in immiscible oil-water mixtures. Additionally, the sorption of trichloromethane reaches 88.1 g/g, and the separation efficiency for surfactant-stabilized emulsions containing diesel is 62.8%. Remarkably, the oil-water separation efficiency surpasses 99.8% in dynamic continuous oil-water separation cycles, as evidenced by 20 experimental trials. These results underscore the substantial potential of SiMAP-modified sponges for addressing oil pollution by enhancing oil-water separation. © 2024

关键词： Demulsification

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Biodiversity conservation and ecological restoration of vulnerable ecosystems in the Anthropocene

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Journal of Plant Ecology 2024年第5期17卷 1-4页

作者： Zhonghua Ning Tian Xie Xinxin Wang Zhenchang Zhu Cong Chen Baoshan Cui Key Laboratory of Ecological Protection in the Yellow River Basin of National Forestry and Grassland Administration School of Ecology and Nature ConservationBeijing Forestry UniversityBeijing 100083China State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnvironmentBeijing Normal UniversityBeijing 100875China Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering National Observations and Research Station for Wetland Ecosystems of the Yangtze EstuarySchool of Life ScienceFudan UniversityShanghai 200433China School of Ecology Environment and ResourcesGuangdong University of TechnologyGuangzhou 510006China Research and Development Center for Watershed Environmental Eco-engineering Advanced Institute of Natural SciencesBeijing Normal UniversityZhuhai 519087China

This editorial summarizes the contributions to the Special Issue Biodiversity conservation and ecological restoration of vulnerable ecosystems in the Anthropocene',established under the Journal of Plant Ecology.

关键词： Biodiversity ecosystems restoration

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Development of a Method to Determine the environmental Burden of Diseases and an Application to Identify Factors Driving Changes in the Number of PM_(2.5)-Related Deaths in China between 2000 and 2010

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environment & Health 2024年第9期2卷 642-650页

作者： Ning Kang Pengfei Li Tao Xue Tong Zhu Institute of Reproductive and Child Health National Health Commission Key Laboratory of Reproductive Health/Department of Epidemiology and BiostatisticsMinistry of Education Key Laboratory of Epidemiology of Major Diseases(PKU)School of Public HealthPeking University Health Science CenterBeijing 100191China Institute of Medical Technology Peking University Health Science CenterBeijing 100191China Advanced Institute of Information Technology Peking UniversityHangzhou 311215China State Environmental Protection Key Laboratory of Atmospheric Exposure and Health Risk Management and Center for Environment and HealthPeking UniversityBeijing 100871China State Environmental Protection Key Laboratory of Atmospheric Exposure and Health Risk Management and Center for Environment and Health and State Key Joint Laboratory of Environment Simulation and Pollution ControlCollege of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China

The attributable burden is codetermined by the exposure level and nontarget ***,the conventional method of health impact assessment based on preestablished exposure−response functions includes only a few well-known characteristics and thus is insufficient to capture the comprehensive *** aimed to develop a method to fuse health impact assessment with epidemiological analysis and to identify factors driving baseline *** method was applied to identify the factors underlying the change in the number of fine particulate matter(PM_(2.5))related deaths in China between 2000 and *** the study period,the number of PM_(2.5)-related deaths across China's Mainland increased by 0.62(95%CI:0.57,0.69)million,with 0.65(95%CI:0.47,0.91)million,0.55(95%CI:0.39,0.79)million,and 0.11(95%CI:0.06,0.18)million deaths being associated with increased PM_(2.5)exposure,population aging,and growth in population size,***,economic growth,urbanization,improvement of welfare services,and improvement of hospital services resulted in 0.25(95%CI:0.15,0.40)million,0.16(95%CI:0.10,0.27)million,0.16(95%CI:0.09,0.26)million,and 0.09(95%CI:0.05,0.15)million fewer deaths,*** indicated that increased exposure was the major driver of the change in the number of PM_(2.5)-related deaths,and economic growth was the main driver of increased resilience to air pollution.

关键词： health burden decomposition analysis air pollution fine particulate matter premature deaths

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New Pathway Mediated by Humic Acid Facilitates Long-Distance Hydroxyl Radical Production during Crystalline Iron Mineral Oxygenation

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environmental science & technology 2025年第22期59卷 2025 May 29页

作者： Wenbo Wu Hengyi Fu Huanxin Ma Ke Sun Zhenqing Shi Zhi Dang Chunhua Feng Shishu Zhu The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters Ministry of Education School of Environment and Energy South China University of Technology Guangzhou 510006 China. State Key Laboratory of Water Simulation School of Environment Beijing Normal University Beijing 100875 China.

Hydroxyl radicals (OH) are extensively produced from crystalline iron minerals under redox oscillation, during which their oxidizing impact on pollutant dynamics is often limited by low transportation. While natural organic matter exists as a ubiquitous redox mediator, how it regulates the distance scale of OH production in a heterogeneous system remains poorly understood. This study, for the first time, reports an unrecognized route mediated by humic acid (HA) in extending the spatial range of OH from oxygenation of reduced hematite (rHem). The results showed that HA facilitated the spatial redistribution of OH from the surface to the solution, posing inverse impacts on oxidation efficacies of pollutants with varying surface accessibilities. It was difficult to explain the enhanced free OH production using electron shuttling by quinones or dissolved Fe-HA complexes. Comprehensive evidence demonstrated that adsorbed HA preferentially consumed surface-bound OH to trigger a solid-to-liquid propagation of carbon-centered radicals (CCR), dominantly promoting formation of secondary free OH far from the surface. Reactive-transport simulation and in situ fluorescence results visualized interfacial and centimeter-scale long-range production of OH mediated by CCR. Fourier transform ion cyclotron resonance mass spectrometry verified the role of surface decarboxylation of adsorbed HA in CCR generation. These findings offer new insights into the environmental fate of OH produced during iron redox cycling in natural and engineered systems, including those with natural organic matter.

关键词： Fenton-like reaction carbon-centered radicals dissolved organic matter long-range electron transfer reactive oxygen species

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From the headwaters to the sea:The role of riparian,alluvial,and tidal wetlands to filter nutrients and ameliorate eutrophication

River

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River 2022年第2期1卷 133-141页

作者： Christopher B.Craft Shanze Li Tian Xie School of Public and Environmental Affairs Indiana UniversityIndianaBloomingtonUSA University of Georgia Marine Institute DarienGeorgiaUSA State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin China Institute of Water Resources and Hydropower ResearchBeijingChina Department of Water Ecology and Environment China Institute of Water Resources and Hydropower ResearchBeijingChina State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnvironmentBeijing Normal UniversityBeijingChina

Wetlands are known for their ability to trap sediment and eliminate pollutants from the surrounding ***,less is known regarding the differential role of headwater,mid-catchment,and coastal wetlands in filtering these *** accretion,organic carbon(C),total nitrogen(N),and total phosphorus(P)were measured in wetlands from the headwaters to the mouth of the Altamaha River,Georgia,USA to assess how sediment deposition,C sequestration,and N and P burial vary along the *** cores(n=2 per site)were collected from riparian,upper and lower alluvial,tidal freshwater forest and marsh,brackish marsh,and salt ***-centimeter depth increments were analyzed for^(137)Cs,to determine soil accretion,bulk density,and C,N,and P *** exhibited a bimodel distribution with the highest rates in riparian wetlands of the headwaters(3.9 mm/year)and in tidal fresh and brackish marshes(4.7–5.4 mm/year)of the *** rates were considerably lower in alluvial and tidal fresh forests and salt marshes(0.9–2.5 mm/year).Carbon sequestration and N burial followed a similar trend with the greatest accumulation in soils of tidal fresh and brackish marshes(102–150 g C/m^(2)/year,7.1–9.5 g N/m^(2)/year)that had not only high accretion but also high organic matter content(11%–12%C).Riparian soils with their low C content,high bulk density,and high P content had much greater sediment deposition(3310 g/m^(2)/year)and P burial(2.75 g P/m^(2)/year)than other wetlands along the waterway(180–1730 g sediment/m^(2)/year,0.23–0.90 g P/m^(2)/year).Results suggest that,in the Altamaha River,sediment deposition and P removal are maximized in the headwaters thereby protecting downstream freshwaters from the effects of P *** fresh and brackish marshes with their high rates of N burial can aid in protecting estuaries from N enrichment,many of which suffer from the effects of N *** from this study are scalable to other r

关键词： eutrophication organic matter soil accretion topography wetlands

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CeO_(2) doping boosted low-temperature NH3-SCR activity of FeTiOx catalyst:A microstructure analysis and reaction mechanistic study

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Frontiers of environmental Science & Engineering 2022年第5期16卷 69-81页

作者： Wei Tan Shaohua Xie Wenpo Shan Zhihua Lian Lijuan Xie Annai Liu Fei Gao Lin Dong Hong He Fudong Liu Department of Civil Environmentaland Construction EngineeringCatalysis Cluster for Renewable Energy and Chemical Transformations(REACT)NanoScience Technology Center(NSTC)University of Central FloridaOrlandoFL32816USA Key Laboratory of Mesoscopic Chemistry of MOE School of Chemistry and Chemical EngineeringJiangsu Key Laboratory of Vehicle Emissions ControlSchool of EnvironmentCenter of Modern AnalysisNanjing UniversityNanjing 210023China State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Key Laboratory of Urban Pollutant Conversion Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China Institute of Engineering Technology Sinopec Catalyst Co.Ltd.Sinopec GroupBeijing 101111China

FeTiOx has been recognized as an environmental-friendly and cost-effective catalyst for selective catalytic reduction(SCR)of NOx with *** at further improving the low-temperature DeNOx efficiency of FeTiOx catalyst,a simple strategy of CeO_(2) doping was *** low-temperature(<250°C)NH3-SCR activity of FeTiOx catalyst could be dramatically enhanced by CeO2 doping,and the optimal composition of the catalyst was confirmed as FeCe_(0.2)TiOx,which performed a NOx conversion of 90%at ca.200°*** to X-ray diffraction(XRD),Raman spectra and X-ray absorption fine structure spectroscopy(XAFS)analysis,FeCe_(0.2)TiOx showed low crystallinity,with Fe and Ce species well mixed with each *** on the fitting results of extended X-ray absorption fine structure(EXAFS),a unique Ce-O-Fe structure was formed in FeCe_(0.2)TiOx *** well improved specific surface area and the newly formed Ce-O-Fe structure dramatically contributed to the improvement of the redox property of FeCe_(0.2)TiOx catalyst,which was well confirmed by H2-temperature-programmed reduction(H2-TPR)and in situ XAFS *** enhanced redox capability could benefit the activation of NO and NH_(3) at low temperatures for NOx *** detailed reaction mechanism study further suggested that the facile oxidative dehydrogenation of NH_(3) to highly reactive-NH_(2) played a key role in enhancing the low-temperature NH_(3)-SCR performance of FeCe_(0.2)TiOx catalyst.

关键词： NH3-SCR CeO_(2)doping Low-temperature NOx removal Improved redox property In situ XAFS analysis

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Experimental Investigation of Particles Dynamics and Solid-Liquid Mixing Uniformity in a Stirred Tank

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Fluid Dynamics & Materials Processing 2024年第11期20卷 2585-2602页

作者： Kai Yang Qinwen Yao Yingshan Li Wanchang Chen Saleh Khorasani Hua Wang Qingtai Xiao State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Kunming University of Science and TechnologyKunming650093China Faculty of Metallurgical and Energy Engineering Kunming University of Science and TechnologyKunming650093China Department of Mechanical Engineering Faculty of EngineeringUrmia University of TechnologyUrmia***Iran State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control Ministry of Ecology and EnvironmentWuhan430081China

Particle suspension and deposition dynamics are significant factors affecting the level of mixing quality in solidliquid two-phase stirring processes. In general, the ability to increase the suspension rate and minimize depositioneffects is instrumental in improving the uniformity of particle mixing, accelerating the reaction of involved solidliquid two-phase, and improving the efficiency of production operations. In this work, suspension and depositionindicator based on the Betti number and a uniformity indicator are introduced and obtained by means of imageanalysis. The influence of the blade type, rotation speed, blade diameter and blade bottom height on the particlesuspension/deposition characteristics and mixing uniformity are carefully investigated. The experimental resultsshow that the two-phase motion region can be divided into three local regions, including a bottom motion alongthe wall, a low-degree suspension region under the blade and a high suspension region above the blade. The bestdegree of particle suspension is attained by the double-inclined blade paddle at a speed of 270 r/min, a paddlediameter ratio of 0.414, and a height-diameter ratio of 0.086. The double-inclined blade paddle has a better effecton promoting particle suspension and solid-liquid two-phase mixing uniformity.

关键词： Solid-liquid particle suspension mixing uniformity Betti number paddle types

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Effects of organic fertilizers produced using different techniques on rice grain yield and ammonia volatilization in double-cropping rice fields

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Pedosphere 2024年第1期34卷 110-120页

作者： Mingcheng HU Andrew JWADE Weishou SHEN Zhenfang ZHONG Chongwen QIU Xiangui LIN Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Collaborative Innovation Center of Atmospheric Environment and Equipment Technologyand School of Environmental Science and EngineeringNanjing University of Information Science and TechnologyNanjing 210044China Department of Geography and Environmental Science University of ReadingReading RG65DWUK Haina Research Institute of Guangdong Haina Agricultural Co. Ltd.Huizhou 516000China State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China

Ammonia(NH_(3)) volatilization from rice fields contributes to poor air quality and indicates low nitrogen use efficiency. Although organic fertilizers can meet the nitrogen requirement for rice growth, the simultaneous effects of organic fertilizers on NH_(3) volatilization and rice yield in paddy fields are poorly understood and quantified. To address this gap in our knowledge, experimental field plots were established in a conventional double-cropping paddy field in the Pearl River Delta region, southern China. Five fertilizer treatments were used besides the control with no fertilizer: fresh organic fertilizer, successively composted organic fertilizer, chemically composted organic fertilizer, mixture of chemically composted organic fertilizer with inorganic fertilizer, and chemical fertilizer. Ammonia volatilization was measured using a batch-type airflow enclosure method. No significant differences in grain yield were observed among organic and chemical fertilizer treatments. However, compared with chemical fertilizer, chemically composted organic fertilizer and successively composted organic fertilizer significantly decreased total NH_(3) volatilization by 70% and 68%, respectively. The ammonium-nitrogen concentration in field surface water correlated strongly(P < 0.01) and positively with NH_(3) volatilization across fertilization treatments. Our findings demonstrate that chemically composted organic fertilizer can sustain rice yield while reducing NH_(3) volatilization. An important future step is to promote these field measurements to similar rice cultivation areas to quantify the regional-and national-scale impact on air quality and nitrogen deposition in sensitive areas, and to design and implement better fertilizer management practices.

关键词： air quality crop production manure NH_(3)emission nitrogen use efficiency

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