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Annual nonmethane hydrocarbon trends in Beijing from 2000 to 2019

Journal of environmental Sciences 2022年第2期34卷 210-217页

作者： Dan Yao Guiqian Tang Jie Sun Yinghong Wang Yuan Yang Yiming Wang Baoxian Liu Hong He Yuesi Wang Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China School of Environment Tsinghua UniversityBeijing 100084China Beijing Key Laboratory of Airborne Particulate Matter Monitoring Technology Beijing Municipal Environmental Monitoring CenterBeijing 100048China Uniuersity of Chinese Academy of Sciences Beijing 100049China

High loads of ground-level ozone have occurred with the implementation of the Air pollution Prevention and control Action ***,the long temporal variation in precursor nonmethane hydrocarbons(NMHCs)has rarely been *** this study,we examined the evolution of NMHCs in Beijing based on ambient measurements from 2000 to *** results indicated that the annual variation of ambient NMHCs during 2000 and 2019 could be divided into two *** mixing ratios of NMHCs rapidly rose during 2000 and 2009(1.76 ppbv/year)but exhibited a downward trend from 2009 to 2019 at rate of 0.80 ppbv/***,the notable decrease in alkenes and aromatics after 2009 led to a sharp decrease in the propylene-equivalent concentration(PEC)(-0.80 ppbv/year).Implementation of emission reduction measures in Beijing have effectively reduced the contribution of vehicle-related sources,but the contribution of solvent usage and fuel consumption increased,which will become the focus of VOC control in Beijing in the future.

关键词： Beijing NMHCs Reactivity Temporal variation

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Design of Ultra-Stable Solid Amine Adsorbents and Mechanisms of Hydroxyl Group-Dependent Deactivation for Reversible CO2 Capture from Flue Gas

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Nano-Micro Letters 2025年第7期 363-381页

作者： Meng Zhao Liang Huang Yanshan Gao Ziling Wang Shuyu Liang Xuancan Zhu Qiang Wang Hong He Dermot O'Hare College of Environmental Science and Engineering Beijing Forestry University State Key Laboratory of Efficient Production of Forest Resources Beijing Forestry University Research Center of Solar Power and Refrigeration Institute of Refrigeration and CryogenicsShanghai Jiao Tong University State Key Joint Laboratory of Environment Simulation and Pollution Control Research Centre for Eco-Environmental SciencesChinese Academy of Sciences Chemistry Research Laboratory Department of ChemistryUniversity of Oxford

Although supported solid amine adsorbents have attracted great attention for CO2capture,critical chemical deactivation problems including oxidative degradation and urea formation have severely restricted their practical applications for flue gas *** this work,we reveal that the nature of surface hydroxyl groups （metal hydroxyl Al–OH and nonmetal hydroxyl Si–OH） plays a key role in the deactivation *** polyethyleneimine （PEI） supported on Al–OH-containing substrates suffers from severe oxidative degradation during the CO2capture step due to the breakage of amine-support hydrogen bonding networks,but exhibits an excellent anti-urea formation feature by preventing dehydration of carbamate products under a pure CO2regeneration *** contrast,PEI supported on Si–OH-containing substrates exhibits excellent anti-oxidative stability under simulated flue gas conditions by forming a robust hydrogen bonding protective network with Si–OH,but suffers from obvi- ous urea formation during the pure CO2regeneration *** also reveal that the urea formation problem for PEI-SBA-15 can be avoided by the incorporation of an OH-containing PEG *** on the intrinsic understanding of degradation mechanisms,we successfully synthesized an adsorbent 40PEI-20PEG-SBA-15 that demonstrates outstanding stability and retention of a high CO2capacity of 2.45 mmol g-1over 1000 adsorption–desorption cycles,together with negligible capacity loss during aging in simulated flue gas （10%CO2+5%O2+3%H2O） for one month at60–70℃.We believe this work makes great contribution to the advancement in the field of ultra-stable solid amine-based CO2capture materials.

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Research on risk Assessment and decision support for underwater Platform in Naval Battle field environment

Research on risk Assessment and decision support for underwa...

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2022 International Conference on Information Processing in Ocean Science and Technology, ICIPOST 2022

作者： Zilong, Guo Hong, Mei Shi, Jian Yunxiang, Zhang Qiuliang, Hu Research Centre of Ocean Environment Numerical Simulation Institute of Meteorology and Oceanography PLA University of Science and Technology Nanjing China Key Laboratory of Surficial Geochemistry Ministry of EducationDepartment of Hydrosciences School of Earth Sciences and Engineering State Key Laboratory of Pollution Control and Resource Reuse Nanjing University Nanjing210093 China

Autonomous underwater unmanned platforms have become important facilities in the marine field since countries attach importance to maritime rights and interests, and play an important role in both military and civilian use. However, complex underwater marine environmental elements will have a huge impact on the performance of underwater unmanned platforms, and how to ensure the safe and stable operation of underwater unmanned platforms has become an urgent problem to be solved. Based on this practical problem, this paper studies the influence of marine environmental elements on the operation of underwater unmanned platforms with reference to the hydrological data of the South China Sea, and uses Bayesian methods to carry out risk zoning of the impact of the marine environment in the South China Sea on underwater unmanned platforms. © Published under licence by IOP Publishing Ltd.

关键词： Risk assessment

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Recent advances in heterogeneous catalysis of solar-driven carbon dioxide conversion

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Journal of environmental Sciences 2024年第6期140卷 165-182页

作者： Jun Xu Farzaneh Arabpour Roghabadi Ying Luo Vahid Ahmadi Qian Wang Zheng Wang Hong He State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China College of Chemistry and Chemical Engineering Henan Polytechnic UniversityJiaozuoHenan 454000China Department of Process Engineering Faculty of Chemical EngineeringTarbiat Modares UniversityTehranIran Optoelectronics and Nanophotonics Research Group Faculty of Electrical and Computer EngineeringTarbiat Modares UniversityTehranIran Graduate School of Engineering Nagoya UniversityFuro-choChikusa-kuNagoya 464-8603Japan

Solar-driven carbon dioxide(CO_(2))conversion including photocatalytic(PC),photoelectrochemical(PEC),photovoltaic plus electrochemical(PV/EC)systems,offers a renewable and scalable way to produce fuels and high-value chemicals for environment and energy *** review summarizes the basic fundament and the recent advances in the field of solar-driven CO_(2)*** the visible-light absorption is an important strategy to improve solar energy conversion *** separation and migration of photogenerated charges carriers to surface sites and the surface catalytic processes also determine the photocatalytic *** engineering including co-catalyst loading,defect engineering,morphology control,surface modification,surface phase junction,and Z-scheme photocatalytic system construction,have become fundamental strategies to obtain high-efficiency *** to photocatalysis,these strategies have been applied to improve the conversion efficiency and Faradaic efficiency of typical PEC *** PV/EC systems,the electrode surface structure and morphology,electrolyte effects,and mass transport conditions affect the activity and selectivity of electrochemical CO_(2)***,the challenges and prospects are addressed for the development of solar-driven CO_(2)conversion system with high energy conversion efficiency,high product selectivity and stability.

关键词： Solar-driven CO_(2)reduction Photocatalytic system Photoelectrochemical system Photovoltaic plus electrochemical system Surface/interface engineering

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Chemical characteristics and water stability evaluation of groundwater in the CKDu Zone of Sri Lanka

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Journal of environmental Sciences 2024年第12期146卷 67-80页

作者： Dazhou Hu Suresh Indika Madhubhashini Makehelwala COORAY Titus Liying Zhu Zhonghe Pang Hui Zhong Sujithra K.Weragoda K.B.S.N.Jinadasa Rohan Weerasooriya Yuansong Wei State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Laboratory of Water Pollution Control Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China Department of Applied Earth Sciences Uva Wellassa UniversityBadulla 90000Sri Lanka China-Sri Lanka Joint Research and demonstration Center for Water Technology Ministry of Water SupplyE.O.E.Pereira MawathaPeradeniya 24000Sri Lanka National Water Supply and Drainage Board Katugastota 20800Sri Lanka Department of Civil Engineering Faculty of EngineeringUniversity of PeradeniyaPeradeniya 20400Sri Lanka National Institute of Fundamental Studies Kandy 20000Sri Lanka

Groundwater is the main source of drinking water for the rural population in the chronic kidney disease of unknown etiology(CKDu)zone of the North Central Province(NCP)in Sri *** this study,a total of 334 groundwater samples(311 dug wells,21 tube wells and 2 springs)during the wet season from two aquifers in the NCP were collected,and inves-tigated their chemical characteristics and evaluate their water quality,including ground-water chemistry,main ion sources,the corrosion and scaling potential of *** results showed that the two hydrochemical types of groundwater in the NCP were mainly of the Ca-HCO_(3),Na·Ca-HCO_(3)types,with the main HCO_(3)−,Na^(+)and Ca^(2+)ions in both types of groundwater originating from silicate and evaporite salt dissolution and influenced by alternating cation adsorption,while the presence of NO_(3)−was mainly ***-uation ofwater stability using namely Langelier saturation index(LSI),Ryznar stability index(RSI),Puckorius scaling index(PSI)and Larson-Skold index(LS),indicated that most ground-water presents corrosion potential and has corrosion behavior tendency of metals to some *** water quality of Polonnaruwa was better than that of Anuradhapura in the NCP,and when the groundwater was worse than the“good”grade,which must be properly treated before it is used as drinking water.

关键词： CKDu zone Rock weathering Cation alternating adsorption Water stability Water quality assessment

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Distribution, Sources, And Potential Health Risks of Fluoride, Total Iodine, and Nitrate In Rural Drinking Water Sources of North and East China

SSRN

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SSRN 2023年

作者： Huang, Shier Guo, Jiaxun Xie, Yu Bian, Rui Wang, Nan 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

Small-scale water sources serving villages and towns are the main source of drinking water in rural areas. Compared to centralized water sources, rural water sources are less frequently monitored for water quality and have poor follow-up treatment facilities, making them vulnerable to drinking health risks. To reveal the hydrochemistry characteristics, contaminants sources, and health risks in rural water sources, 189 water samples were collected from lakes and reservoirs, rivers, and groundwater in North and East China for major ions, nutrient salts, microelements, and stable isotope analysis. Statistical analysis and isotopic tracing were performed, as well as an assessment of the risk to human health. The exceeding threshold rates for fluoride (F-) and nitrate (NO3-) in surface water were 1.8% and 9.1% respectively. For groundwater, the exceeding threshold rates were 20.9% for F-, 15.7% for total iodine (TI), and 4.5% for NO3-. F- and TI were mainly derived from the leaching of fluoride- and iodine-containing minerals by cationic exchange, and NO3- is mainly derived from nitrogen in the soil (31.7-43.9%), the use of ammonia fertilizers, and the discharge of manure and sewage. Nitrogen in the soil can be an important source of nitrate in the aquatic environment, and soils with higher clay content have a greater retention effect on the migration of nitrogen pollutants from the surface to the groundwater. F- in water sources contributes most to human health risks for drinking, followed by NO3- and TI, and a higher proportion of groundwater sources has health risks for drinking than that surface water sources. The authorities should give high priority to optimizing the choice of water sources and technology for water treatment, and rational measures should be taken to protect water sources from the threats of anthropogenic pollution. © 2023, The Authors. All rights reserved.

关键词： Risk assessment

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The Influence of Wet-to-Dry Season Shifts on the Microbial Community Stability and Nitrogen Cycle in the Poyang Lake Sediment

SSRN

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SSRN 2023年

作者： Guo, Jiaxun Wang, Xu Cao, Xiaofeng Qi, Weixiao Peng, Jianfeng Liu, Huijuan Qu, Jiuhui Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China

In lake environments, seasonal changes or extreme droughts can cause exposure of the lake sediment, leading to soil formation. Although previous studies have explored how environmental changes influence microbial functioning in the water-level-fluctuating zone, few studies have investigated how wholescale habitat changes affect microbial composition, community stability and ecological functions in lake environments. To address this, our study therefore investigated the effects of sediment-to-soil conversion on microbial composition, community stability and subsequent ecological functioning in Poyang Lake, China. Our results revealed that, during sediment-to-soil conversion, the number of total and unique operational taxonomic units (OTUs) decreased by 40% and 55%, respectively. Moreover, sediment-to-soil conversion decreased the microbial network’s connection and robustness but significantly increased its stability, through increased negative cohesion and modularity. In sediment and soil, the abundance of dominant bacteria, and bacterial diversity strongly affected microbial community stability, although this was not true in water. Furthermore, the specific microbial phyla and genes involved in the nitrogen cycle changed significantly after sediment-to-soil conversion, with the major nitrogen-cycling processes changing from denitrification and dissimilatory nitrate reduction to ammonium (DNRA) to nitrification and assimilatory nitrate reduction to ammonia (ANRA). Moreover, we observed a compensation mechanism in the functional genes related to the nitrogen cycle, such that all the nitrogen cycle’s processes were maintained after sediment-to-soil conversion. The oxidation-reduction potential strongly affected network complexity, microbial stability, and nitrogen cycling in the sediment and soil. These results are important for understanding the responses of microorganisms to climate change and extreme drought. © 2023, The Authors. All rights reserved.

关键词： Soils

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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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Corrigendum to“Emerging Organic Contaminants in Chinese Surface Water:Identification of Priority Pollutants”[Engineering 11(2022)111-125]

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Engineering 2023年第12期31卷 139-140页

作者： Mengmeng Zhong Tielong Wang Wenxing Zhao Jun Huang Bin Wang Lee Blaney Qingwei Bu Gang Yu Beijing Key Laboratory for Emerging Organic Contaminants Control State Key Joint Laboratory of Environment Simulation and Pollution Control(SKLESPC)School of EnvironmentTsinghua UniversityBeijing 100084China Department of Chemical Biochemicaland Environmental EngineeringUniversity of Maryland Baltimore CountyBaltimoreMD 21250USA School of Chemical and Environmental Engineering China University of Mining and Technology-BeijingBeijing 100083China

The authors regret that the acceptable daily intake(ADI)values of 0.082 μg·kg^(-1)·d^(-1) for N,N-diethyl-3-methyl benzoyl amide(DEET),0.19 μg·kg^(-1)·d^(-1) for triclosan,and 0.83 μg·kg^(-1)·d^(-1) for acetaminophen cited from a review by Murray et al.[1],as shown in Table S4 in Appendix A of the original article,were not correct.

关键词： benzoyl diethyl

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The Response of Microbial Compositions and Functions to Chronic Single and Multiple Antibiotic Exposure by Batch Experiment

SSRN

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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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