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Changes in source contributions to the oxidative potential of PM_(2.5)in urban Xiamen,China

Journal of environmental Sciences 2025年第3期149卷 342-357页

作者： Jia-Min Li Si-Min Zhao Qi-Yu Miao Shui-Ping Wu Jie Zhang James J.Schwab Fujian Provincial Key Laboratory for Coastal ecology and environmental Studies Xiamen UniversityXiamen 361102China center for Marine environmental Chemistry and Toxicology College of Environment and EcologyXiamen UniversityXiamen 361102China Atmospheric Sciences research center University at AlbanySUNYAlbany 12226USA

The toxicity of PM_(2.5)does not necessarily change synchronously with its mass *** this study,the chemical composition(carbonaceous species,water-soluble ions,and metals)and oxidative potential(dithiothreitol assay,DTT)of PM_(2.5)were investigated in 2017/2018 and 2022 in Xiamen,*** decrease rate of volume-normalized DTT(DTTv)(38%)was lower than that of PM_(2.5)(55%)between the two sampling ***,the mass-normalized DTT(DTTm)increased by 44%.Clear seasonal patterns with higher levels in winter were found for PM_(2.5),most chemical constituents and DTTv but not for *** large decrease in DTT activity(84%−92%)after the addition of EDTA suggested that watersoluble metals were the main contributors to DTT in *** increased gap between the reconstructed and measured DTTv and the stronger correlations between the reconstructed/measured DTT ratio and carbonaceous species in 2022were *** decrease rates of the hazard index(32.5%)and lifetime cancer risk(9.1%)differed from those of PM_(2.5)and DTTv due to their different main *** PMF-MLR model showed that the contributions(nmol/(min·m^(3)))of vehicle emission,coal+biomass burning,ship emission and secondary aerosol to DTTv in 2022 decreased by 63.0%,65.2%,66.5%,and 22.2%,respectively,compared to those in 2017/2018,which was consistent with the emission reduction of vehicle exhaust and coal consumption,the adoption of low-sulfur fuel oil used on board ships and the reduced production of ***,the contributions of dust+sea salt and industrial emission increased.

关键词： Chemical composition Oxidative potential Interannual change PMF-MLR Source apportionment

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Accumulation characteristics and fate modeling of phthalic acid esters in surface water from the Three Gorges Reservoir area,China

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Journal of environmental Sciences 2025年第3期149卷 46-56页

作者： Shuai Sun Bing Zhang Junjie Hu Wen Gu ZhenWang Deling Fan Feng Ge Lili Shi LeiWang Nanjing Institute of environmental Science Ministry of Ecology and Environment of the People’s Republic of ChinaNanjing 210042China Key Laboratory of Pesticide environmental Assessment and Pollution Control Ministry of Ecology and Environment of the People’s Republic of ChinaNanjing 210042China Solid Waste and Chemicals Management center Ministry of Ecology and Environment of the People’s Republic of ChinaBeijing 100029China

Phthalic acid esters(PAEs)are a group of compounds widespread in the *** investigate the occurrence and accumulation characteristics of PAEs,surface water samples were collected from the Three Gorges Reservoir area,*** total concentrations of∑_(11)analyzed PAEs(11PAEs)in the collected water samples ranging from 197.7 to 1,409.3 ng/L(mean±IQR:583.1±308.4 ng/L).While DEHP was the most frequently detected PAE,DnBP and DnNP were the most predominant PAEs in the analyzed water samples with a mean contribution of 63.3%of the∑_(11)*** concentrations of the∑_(11)PAEs in the water samples from the upper reaches of the Yangtze River were significantly higher than those from themiddle *** better understand the transport and fate of the PAEs,seven detected PAEs were modeled by Quantitative Water Air Sediment Interaction(QWASI).The simulated and measured values were close for most PAEs,and differences are within one order of magnitude even for the worst *** all simulated PAEs,water and particle inflow were main sources in the reservoir,whereas water outflow and degradation in water were important removal *** contribution ratios of different sources/losses varied fromPAEs,depending on their *** calculated risk quotients of DnNP in the Three Gorges Reservoir area whether based onmonitoring or simulating results were all far exceeded the safety threshold value,implying the occurrence of this PAE compound may cause potential adverse effects for the aquatic ecology of the Three Gorges Reservoir area.

关键词： Phthalic esters Surface water Transport and fate Three Gorges Reservoir area Risk assessment

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RE-SEGNN:recurrent semantic evidence-aware graph neural network for temporal knowledge graph forecasting

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Science China(Information Sciences) 2025年第2期68卷 103-119页

作者： Wenyu CAI Mengfan LI Xuanhua SHI Yuanxin FAN Quntao ZHU Hai JIN National Engineering research center for big data Technology and System Services Computing Technology and System LabCluster and Grid Computing LabSchool of Computer Science and TechnologyHuazhong University of Science and Technology

Temporal knowledge graph(TKG) reasoning, has seen widespread use for modeling real-world events, particularly in extrapolation settings. Nevertheless, most previous studies are embedded models, which require both entity and relation embedding to make predictions, ignoring the semantic correlations among different entities and relations within the same timestamp. This can lead to random and nonsensical predictions when unseen entities or relations occur. Furthermore, many existing models exhibit limitations in handling highly correlated historical facts with extensive temporal depth. They often either overlook such facts or overly accentuate the relationships between recurring past occurrences and their current counterparts. Due to the dynamic nature of TKG, effectively capturing the evolving semantics between different timestamps can be *** address these shortcomings, we propose the recurrent semantic evidenceaware graph neural network(RE-SEGNN), a novel graph neural network that can learn the semantics of entities and relations simultaneously. For the former challenge, our model can predict a possible answer to missing quadruples based on semantics when facing unseen entities or relations. For the latter problem, based on an obvious established force, both the recency and frequency of semantic history tend to confer a higher reference value for the current. We use the Hawkes process to compute the semantic trend, which allows the semantics of recent facts to gain more attention than those of distant facts. Experimental results show that RE-SEGNN outperforms all SOTA models in entity prediction on 6 widely used datasets, and 5 datasets in relation prediction. Furthermore, the case study shows how our model can deal with unseen entities and relations.

关键词： knowledge graph reasoning temporal knowledge graph Hawkes process semantic evidence

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Exploring the HONO source during the COVID-19 pandemic in a megacity in China

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Journal of environmental Sciences 2025年第3期149卷 616-627页

作者： Mingkai Wang Shenbo Wang Ruiqin Zhang Minghao Yuan Yifei Xu Luqi Shang Xinshuai Song Xinyuan Zhang Yunxiang Zhang School of ecology and environment Zhengzhou UniversityZhengzhou 450000China research Institute of environmental Sciences Zhengzhou UniversityZhengzhou 450000China Zhengzhou Ecological environment Monitoring center of Henan Province Zhengzhou 450000China College of Chemistry Zhengzhou UniversityZhengzhou 450000China

HONO is a critical precursor of•OH,but its sources are controversial due to its complex formation *** study conducted comprehensive observations in Zhengzhou from April 26 to May 11,*** NO_(x)concentrations were observed during the Covid epidemic period(EP)(10.4±3.0 ppb),compared to the pre-epidemic period(PEP)(12.5±3.8 ppb).The mean HONO concentration during EP(0.53±0.34 ppb)was 0.09 ppb lower than that during PEP(0.62±0.53 ppb).The decrease in HONO concentration during EP came mainly at night due to the reduction in the direct emission(P_(emi))(0.03 ppb/hr),the homogeneous reaction between•OHandNO(P_(OH+NO))(0.02 ppb/hr),and the heterogeneous conversion of NO_(2)on the ground(0.01 ppb/hr).Notably,there was no significant change in daytime HONO *** daytime HONO budget indicated that the primary HONO sources during PEP were the nitrate photolysis(P_(nitrate)),followed by the P_(OH+NO),Pemi,the photo-enhanced reaction of NO_(2)on the ground(P_(ground+hv))and aerosol surface(Paerosol+hv).The primary HONO sources were Pnitrate,POH+NO,P_(emi),and_(Paerosol+hv)during EP,*** missing source has a high correlation with solar radiation,there might be other photo-related HONO sources or the contributions of photosensitized reactions were *** the extremely underestimated cases,HONO production rates fromthe P_(nitrate),P_(ground+hv),and Paerosol+hv increased by 0.17,0.10,and 0.10 ppb/hr during PEP,0.23,0.13,and 0.16 ppb/hr during EP,and P_(nitrate)was still the primary source during both PEP and EP.

关键词： Nitrous acid Nitrogen oxides COVID-19 HONO budget Unknown sources

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Establishment and verification of anthropogenic speciated VOCs emission inventory of Central China

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Journal of environmental Sciences 2025年第3期149卷 406-418页

作者： Xuan Lu Dong Zhang Lanxin Wang Shefang Wang Xinran Zhang Yali Liu Keying Chen Xinshuai Song Shasha Yin Ruiqin Zhang Shanshan Wang Minghao Yuan College of Chemistry Zhengzhou UniversityZhengzhou 450001China research Institute of environmental Sciences Zhengzhou UniversityZhengzhou 450001China School of ecology and environment Zhengzhou UniversityZhengzhou 450001China Zhengzhou Ecological environment Monitoring center of Henan Province Zhengzhou 450000China

Improving the accuracy of anthropogenic volatile organic compounds(VOCs)emission inventory is crucial for reducing atmospheric pollution and formulating control policy of air *** this study,an anthropogenic speciated VOCs emission inventory was established for Central China represented by Henan Province at a 3 km×3 km spatial resolution based on the emission *** 2019 VOCs emission in Henan Provincewas 1003.5 Gg,while industrial process source(33.7%)was the highest emission source,Zhengzhou(17.9%)was the city with highest emission and April and August were the months with the more *** VOCs emission regions were concentrated in downtown areas and industrial *** and aromatic hydrocarbons were the main VOCs contribution *** species composition,source contribution and spatial distribution were verified and evaluated through tracer ratio method(TR),Positive Matrix Factorization Model(PMF)and remote sensing inversion(RSI).Results show that both the emission results by emission inventory(EI)(15.7 Gg)and by TRmethod(13.6 Gg)and source contribution by EI and PMF are *** spatial distribution of HCHO primary emission based on RSI is basically consistent with that of HCHO emission based on EI with a R-value of *** verification results show that the VOCs emission inventory and speciated emission inventory established in this study are relatively reliable.

关键词： VOCs verification Species composition Tracer ratio PMF Remote sensing inversion

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The effect of fine grits and fine debris concentrations on the MLVSS/MLSS ratio of an activated sludge system

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Journal of environmental Sciences 2025年第1期147卷 607-616页

作者： Zhao Jiang Zhiheng Xia Shuai Liu QiWei Haitao Fan Lu Qi Guohua Liu Hongchen Wang Low-carbon Water environment Technology research center School of Environment&Natural ResourcesRenmin University of ChinaBeijing 100872China

This study embarks on an explorative investigation into the effects of typical concentrations and varying particle sizes of fine grits(FG,the involatile portion of suspended solids)and fine debris(FD,the volatile yet unbiodegradable fraction of suspended solids)within the influent on themixed liquor volatile suspended solids(MLVSS)/mixed liquor suspended solids(MLSS)ratio of an activated sludge *** meticulous experimentation,it was discerned that the addition of FG or FD,the particle size of FG,and the concentration of FD bore no substantial impact on the pollutant removal efficiency(denoted by the removal rate of COD and ammonia nitrogen)under constant operational ***,a notable decrease in the MLVSS/MLSS ratio was observed with a typical FG concentration of 20 mg/L,with smaller FG particle sizes exacerbating this ***,variations in FD concentrations influenced both MLSS andMLVSS/MLSS ratios;a higher FD concentration led to an increased MLSS and a reduced MLVSS/MLSS ratio,indicating FD accumulation in the system.A predictive model for MLVSS/MLSS was constructed based on quality balance calculations,offering a tool for foreseeing the MLVSS/MLSS ratio under stable long-term influent conditions of FG and *** model,validated using data from the BXH wastewater treatment plant(WWTP),showcased remarkable accuracy.

关键词： Fine grits and fine debris Activated sludge system MLVSS/MLSS ratio Predictive model

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Development and validation of a nomogram model for predicting overall survival in patients with gastric carcinoma

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World Journal of Gastrointestinal Oncology 2025年第2期17卷 132-143页

作者： Guan-Zhong Liang Xiao-Sheng Li Zu-Hai Hu Qian-Jie Xu Fang Wu Xiang-Lin Wu Hai-Ke Lei Chongqing Key Laboratory of Translational research for Cancer Metastasis and Individualized Treatment Chongqing University Cancer HospitalChongqing 400030China Chongqing Cancer Multi-omics big data Application Engineering research center Chongqing University Cancer HospitalChongqing 400030China Department of Health Statistics School of Public HealthChongqing Medical UniversityChongqing 400016China research center for Medicine and Social Development School of Public HealthChongqing Medical UniversityChongqing 400016China The research center of big data Chongqing University Cancer HospitalChongqing 400030China

BACKGROUND The prevalence and mortality rates of gastric carcinoma are disproportionately elevated in China,with the disease's intricate and varied characteristics further amplifying its health *** forecasting of overall survival(OS)is of paramount importance for the clinical management of individuals afflicted with this *** To develop and validate a nomogram model that provides precise gastric cancer prevention and treatment guidance and more accurate survival outcome prediction for patients with gastric *** data analysis was conducted on samples collected from hospitalized gastric cancer patients between 2018 and *** absolute shrinkage and selection operator,univariate,and multivariate Cox regression analyses were employed to identify independent prognostic factors.A nomogram model was developed to predict gastric cancer patient *** model's predictability and discriminative ability were evaluated via receiver operating characteristic *** evaluate the clinical utility of the model,Kaplan-Meier and decision curve analyses were *** A total of ten independent prognostic factors were identified,including body mass index,tumor-node-metastasis(TNM)stage,radiation,chemotherapy,surgery,albumin,globulin,neutrophil count,lactate dehydrogenase,and platelet-to-lymphocyte *** area under the curve(AUC)values for the 1-,3-,and 5-year survival prediction in the training set were 0.843,0.850,and 0.821,*** AUC values were 0.864,0.820,and 0.786 for the 1-,3-,and 5-year survival prediction in the validation set,*** model exhibited strong discriminative ability,with both the time AUC and time C-index exceeding *** with TNM staging,the model demonstrated superior clinical ***,a nomogram was developed via a web-based *** This study established and validated a novel nomogram model for predicting the OS of gastric cancer patients,which demonstrat

关键词： Gastric carcinoma Prediction Overall survival Nomogram Prospective

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Multi-Method Comprehensive Investigation and Evaluation on the Effect of in-situ Engineering Disposal of Contaminated Mine Water

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Journal of Ocean University of China 2025年第1期24卷 75-84页

作者： DING Guantao LU Jie SHI Xinyu WANG Faming MA Yongyue LIU Yuxiang WEI Shanming WANG Yu GUO Xiujun Key Laboratory of Shandong Provincial for Marine environment and Geological Engineering Ocean University of ChinaQingdao 266100China Key Laboratory of Marine environment and ecology Ministry of EducationOcean University of ChinaQingdao 266100China 801 Institute of Hydrogeology and Engineering Geology Shandong Provincial Bureau of Geology&Mineral ResourcesJinan 250014China Shandong Engineering research center for environmental Protection and Remediation on Groundwater Jinan 250014China Zhangqiu Branch of Jinan Ecological environment Bureau Jinan 250200China Solid Waste and Chemicals Management center Ministry of ecology and environment Beijing 100012China

Mine water pollution caused by improper discharge of industrial wastewater,waste liquid and waste residue into minedout areas is a new form of pollution occurred in China in recent *** kind of pollution is buried deeply,and it is difficult to control,dispose and *** contaminated mine water from abandoned mining areas may even enter the ocean,posing a great threat to marine *** this study,using a water pollution incident occurred in a coal field at a depth of 80 m in Shandong Province,China,in 2015,as an example,the methods of engineering block disposal and groundwater remediation are reported,and the remediation effects are tested and evaluated by in-situ chemical detection and geophysical *** test results showed that engineering blocking measures such as cut-off walls can obviously block the DNAPL diffusion process in mine water,but the blocking effect on organic pollutants dissolved in water was *** can slow down the diffusion process of organic *** presence of mining tunnels and mined-out areas in the contaminated zone enhances the diffusion speed of various pollutants,especially during the remediation process when pollutants rapidly spread throughout the entire contaminated *** circulation extraction and oxidation methods have a significant degradation effect on pollutants like dichloromethane,but they may generate a large amount of secondary gaseous *** gaseous pollutants may migrate to the shallow subsurface through structures such as faults,leading to secondary subsurface *** designing remediation plans,it is crucial to strike a balance between blocking and guiding in the context of both blocking and restoration projects for achieving effective remediation.

关键词： deep stratum goaf organic pollution of groundwater engineering disposal effect evaluation

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Spatiotemporal deformation analysis of glaciers and surrounding landscapes in the Shishapangma region using InSAR techniques

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Journal of Mountain Science 2025年第1期22卷 210-229页

作者： LIANG Wenli LIU Rui JI Qin KOU Pinglang Chongqing Key Laboratory of GIS Application School of Geography and TourismChongqing Normal UniversityChongqing 401331China National Earth System Science data center Beijing 100000China Chongqing Engineering research center of Spatial big data Intelligent Technology Chongqing University of Posts and TelecommunicationsChongqing 400065China Key Laboratory of Tourism Multisource data Perception and Decision Ministry of Culture and Tourism(TMDPDMCT)Chongqing University of Posts and TelecommunicationsChongqing 400065China

Glacier dynamics in the Himalayan midlatitudes,particularly in regions like the Shishapangma,are not yet fully understood,especially the localized topographic and climatic impacts on glacier *** study analyzes the spatiotemporal characteristics of glacier surface deformation in the Shishapangma region using the Small Baseline Subset(SBAS)Interferometric Synthetic Aperture Radar(In SAR)*** analysis reveals an average deformation rate of-4.02±17.65 mm/yr across the entire study area,with glacier regions exhibiting significantly higher rates of uplift(16.87±13.20 mm/yr)and subsidence(20.11±14.55 mm/yr)compared to non-glacier *** identifies significant surface lowering on the mountain flanks and localized uplift in certain catchments,emphasizing the higher deformation rates in glacial areas compared to non-glacial *** found a strong positive correlation between temperature and cumulative deformation(correlation coefficient of 0.63),particularly in glacier areas(0.82).The research highlights the role of temperature as the primary driver of glacier wastage,particularly at lower elevations,with strong correlations found between temperature and cumulative *** also indicates the complex interactions between topographic features,notably,slope gradient,which shows a positive correlation with subsidence rates,especially for slopes below 35°.South-,southwest-,and west-facing slopes exhibit significant uplift,while north-,northeast-,and east-facing slopes predominantly ***,we identified transition zones between debris-covered glaciers and clean ice as areas of most intense deformation,with average rates exceeding 30 mm/yr,highlighting these as potential high-risk zones for *** study comprehensively analyzes the deformation characteristics in both glacier and non-glacier areas in the Shishapangma region,revealing the complex interplay of topographic,climatic,and hydrological factors influencing glacier dynamic

关键词： Glacier melting SBAS-InSAR Topographic factors Temperature change Middle Himalayas

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Mapping the territories of the mountain-foothill zone of Tajikistan exposed to mudflows

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Journal of Mountain Science 2025年第1期22卷 16-30页

作者： SAFAROV Mustafo KANG Shichang FAZYLOV Ali GULAYOZOV Majid NAVRUZSHOEV Hofiz BANERJEE Abhishek MAMADJANOV Yunus Key Laboratory of Cryospheric Science and Frozen Soil Engineering Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China research center for ecology and environment of Central Asia(Dushanbe) Dushanbe 734063Tajikistan University of Chinese Academy of Sciences Beijing 100049China Institute of Water Problems Hydropower and Ecology of the National Academy of Sciences of TajikistanDushanbe 734042Tajikistan Mountain Societies research Institute University of Central AsiaDushanbe 734000Tajikistan State Scientific Institution“center for research of Glaciers of the National Academy of Sciences of Tajikistan” Dushanbe 734025Tajikistan

In recent years,mudflows have emerged as a significant threat to infrastructure and lives,exhibiting increased frequency and *** study collectively addresses the rising threat of natural hazards,specifically mudflows in mountain-foothill zones in Tajikistan,utilizing UAV and remote sensing technologies to monitor their *** 2020 to 2023,we employed a QC-2 Micro UAV and a DJI Phantom 4 quadcopter to capture high-resolution aerial imagery across multiple affected districts,supplemented by pre-and post-event Sentinel-2 images analyzed using the Normalized Difference Water Index(NDWI)and Normalized Difference Vegetation Index(NDVI).Our analysis revealed that 49 districts and cities experienced significant mudflow events,resulting in estimated damages and economic losses of 30.2 million USD,with particularly severe impacts noted in the Khuroson,Tojikobod,Vakhsh,Panjakent,Lakhsh,and *** composition of mudflows in the six studied areas predominantly consisted of clay,with some regions featuring mudstone and a few exhibiting a mixture of both *** findings indicate the predominance of rain-induced mudflows in foothill areas,contrasting with rain-snow,glacial,and lake-outburst-induced mudflows in mountainous *** underscores the urgent need for effective disaster risk management strategies in vulnerable *** UAV and remote sensing technologies provides crucial information for analyzing damages,identifying vulnerable areas,and advising emergency response efforts,thereby enhancing disaster risk management in Tajikistan.

关键词： Disaster Mudflows Remote sensing Unmanned aerial vehicles Tajikistan

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