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Is atmospheric oxidation capacity better in indicating tropospheric O_(3) formation?

Frontiers of environmental Science & Engineering 2022年第5期16卷 127-133页

作者： Peng Wang Shengqiang Zhu Mihalis Vrekoussis Guy PBrasseur Shuxiao Wang Hongliang Zhang Department of Atmospheric and Oceanic Sciences Fudan UniversityShanghai 200438China IRDR ICoE on Risk Interconnectivity and Governance on Weather/Climate Extremes Impact and Public Health Fudan UniversityShanghai 200438China Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention Department of Environmental Science&EngineeringFudan UniversityShanghai 200438China Institute of Environmental Physics University of BremenBremen D-28359Germany Climate and Atmosphere Research Center(CARE-C) the Cyprus InstituteNicosia 27456Cyprus Max Planck Institute for Meteorology Hamburg 20146Germany National Center for Atmospheric Research BoulderCO 80307USA State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084China Institute of Eco-Chongming(IEC) Shanghai 202162China

Tropospheric ozone(O_(3))concentration is increasing in China along with dramatic changes in precursor emissions and meteorological conditions,adversely affecting human health and ecosystems.O_(3) is formed from the complex nonlinear photochemical reactions from nitrogen oxides(NOx=NO+NO_(2))and volatile organic compounds(VOCs).Although the mechanism of O_(3) formation is rather clear,describing and analyzing its changes and formation potential at fine spatial and temporal resolution is still a challenge *** this study,we briefly summarized and evaluated different approaches that indicate O_(3) formation *** identify that atmospheric oxidation capacity(AOC)is a better indicator of photochemical reactions leading to the formation of O_(3) and other secondary *** show that AOC has a prominent positive relationship to O_(3) in the major city clusters in China,with a goodness of fit(R^(2))up to *** outcome provides a novel perspective in characterizing O_(3) formation and has significant implications for formulating control strategies of secondary pollutants.

关键词： O_(3) AOC O_(3) formation regime

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Arsenic Removal from Groundwater Using Iron Pyrite:Influence Factors and Removal Mechanism

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Journal of Earth Science 2023年第3期34卷 857-867页

作者： Muhammad Yousuf Jat Baloch Chunli Su Shakeel Ahmed Talpur Javed Iqbal Kulvinder Bajwa School of Environmental Studies China University of GeosciencesWuhan 430078China State Environmental Protection Key Laboratory of Source Apportionment and Control of Aquatic Pollution Ministry of Ecology and EnvironmentWuhan 430078China College of New Energy and Environment Jilin UniversityChangchun 130021China University School for Graduates Studies Chaudhary Devi Lal University125055 Sirsa HaryanaIndia

Iron pyrite has been reported as a kind of potential material for arsenic(As)removal from the groundwater because it exhibits a strong attraction in groundwater for both arsenite and arsenate *** this study,batch adsorption experiments were carried out to determine the optimum conditions for As adsorption by the iron pyrite adsorbent,including the initial concentration,adsorbent dosage ratio,pH,temperature and stirring *** characterization methods were employed to identify the mechanism of As *** removal efficiency for As(Ⅲ)was observed 93%at pH=7,and for As(Ⅴ)was 95%observed at pH=*** model resulted in the maximum adsorption capacity(q_(m))for As(Ⅲ)and As(Ⅴ)were 571.7 and 671.1μg/g,respectively,as well as the experiments were found to be favorable as separation factor R_(L)<*** value of“n”2.68 and 2.47 for As(Ⅲ)and As(Ⅴ)obtained by Freundlich model(n>1)indicates favorable *** pseudo-first and second-order kinetic models also fitted *** addition of oxalate on the adsorbent surface plays an important role for the recycling of Fe(Ⅱ)/Fe(Ⅲ)to minimize the arsenic *** surface area,ion exchange mechanism and structure of adsorbent confirmed that addition of oxalate could enhance the surface area of adsorbent.

关键词： arsenic groundwater pyrite adsorption oxalate hydrochemistry

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Differential Urban-Rural Inequalities and Driving Mechanisms of Pm2.5 Exposure in Urban Agglomerations - Evidence from the Central Plains Urban Agglomeration, China

SSRN

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SSRN 2025年

作者： Sun, Xiaofan Wang, Chengyuan Ji, Yaqin Dang, Qiuling Fu, Zhicong Mao, Xuegang Wang, Enheng Jiang, Yan State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing100012 China College of Forestry Northeast Forestry University Harbin150040 China Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education Northeast Forestry University Harbin150040 China Research and Development Center of Big Data for Ecosystem Northeast Forestry University Harbin150040 China College of Environmental Science and Engineering Nankai University Tianjin300350 China State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control Tianjin300350 China College of Materials and Energy Lanzhou University Lanzhou730137 China

Exposure to PM2.5 poses severe risks to public health and sustainable development, with exposure inequalities exacerbated by variations in atmospheric activity and uneven regional development. However, the urban−rural inequalities and natural−human driving mechanisms underlying PM2.5 exposure inequalities within urban agglomerations are poorly understood. Taking the Central Plains Urban Agglomeration (CPUA) in China as an example, this study investigated the spatio-temporal variations of PM2.5 and considered its future trends. The Theil index was employed to quantify PM2.5 exposure inequalities. An interpretable machine learning model (RF-SHAP) was applied to identify the natural and socioeconomic driving factors. We found that 99.68% of the CPUA exhibited a decreasing trend in ground-level PM2.5. The overall Theil index decreased from 0.168 to 0.142, with a rural decline from 0.115 to 0.084, suggesting an overall reduction in air pollution, particularly in rural areas. Conversely, the urban Theil index increased from 0.096 to 0.208, highlighting an increasing disparity in urban PM2.5 exposure. Resource-based cities, such as Changzhi, Jincheng, and Jiaozuo, exhibited the largest PM2.5 exposure inequality. Elevation was identified as the dominant factor influencing overall and rural PM2.5 exposure inequalities, while population density was the primary driver of urban inequalities. This study highlighted the differences in urban−rural PM2.5 inequalities and their drivers at the city agglomeration scale. The aims were to mitigate PM2.5 exposure inequalities through socio-environmental systems, provide evidence for the integrated management of PM2.5 exposure inequalities in city agglomerations, and support regional sustainable development. © 2025, The Authors. All rights reserved.

关键词： Health risks

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The development of local ambient air quality standards: A case study of Hainan Province, China

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Eco-Environment & Health 2024年第1期3卷 11-20页

作者： Qian Song Nannan Zhang Yanning Zhang Dejia Yin Jiming Hao Shuxiao Wang Shengyue Li Wenshuai Xu Weijun Yan Xinxin Meng Xinghong Xu Xiaochen Wu Donghai Xie Yun Zhu Qipeng Qu Xuan Hou Yueqi Jiang Zhaoxin Dong Haotian Zheng Yisheng Sun Zeqi Li Bin Zhao State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084China Institute of Strategic Planning Chinese Academy of Environmental PlanningBeijing 100041China Hainan Research Academy of Environmental Sciences Haikou 571126China Hainan Provincial Ecological and Environmental Monitoring Center Haikou 570206China Hainan Radiation Environmental Monitoring Station Haikou 571126China Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control College of Environment and EnergySouth China University of TechnologyGuangzhou Higher Education Mega CenterGuangzhou 510006China

The ambient air quality standard(AAQS)is a vital policy instrument for protecting the environment and human *** Province is at the forefront of China's efforts to protect its ecological environment,with an official goal to achieve world-leading air quality by ***,neither the national AAQS nor the World Health Organization guideline offers sufficient guidance for improving air quality in Hainan because Hainan has well met the former while the latter is excessively ***,the establishment of Hainan's local AAQS becomes ***,research regarding the development of local AAQS is scarce,especially in comparatively more polluted countries such as *** relatively high background values and significant interannual fluctuations in air pollutant concentrations in Hainan present challenges in the development of local *** research proposes a world-class local AAQS of Hainan Province by reviewing the AAQS in major countries or regions worldwide,analyzing the influence of different statistical forms,and carefully evaluating the attainability of the *** the proposed AAQS,the annual mean concentration limit for PM2.5,the annual 95th percentile of daily maximum 8-h mean(MDA8)concentration limit for O_(3),and the peak season concentration limit for O_(3) are set at 10,120,and 85μg/m^(3),*** study indicates that,with effective control policies,Hainan is projected to achieve compliance with the new standard by *** implementation of the local AAQS is estimated to avoid 1,526(1,253–1,789)and 259(132–501)premature deaths attributable to longterm exposure to PM2.5 and O_(3) in Hainan in 2035,respectively.

关键词： Local ambient air quality standard Statistical form Feasibility Health effects Hainan province

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Ammonia and phosphorus removal from using cash crop waste-derived agricultural runoff biochars

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Frontiers of environmental Science & Engineering 2020年第3期14卷 141-153页

作者： Alisa Salimova Jian'e Zuo Fenglin Liu Yajiao Wang Sike Wang Konstantin Verichev State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China Beijing JingYi Air Protection&Technology Company Wanda Plaza93 Jianguo RoadChaoyang DistrictBeijing 100022China Institute of Civil Engineering Faculty of Engineering SciencesUniversidad Austral de ChileValdivia 5090000Chile

Adsorption of biochars(BC)produced from cash crop residuals is an economical and practical technology for removing nutrients from agricultural *** this study,B C made of orange tree trunks and tea tree twigs from the Laoguanhe Basin were produced and modified by aluminum chloride(Al-modified)and ferric sulfate solutions(Fe-modified)under various pyrolysis temperatures(200℃-600℃)and residence times(2-5 h).All produced and modified B C were further analyzed for their abilities to adsorb ammonia and phosphorus with initial concentrations of 10-40 mg/L and 4-12 mg/L,***-modified Tea Tree B C 2h/400℃showed the highest phosphorus adsorption capacity of 0.56 mg/***-modified Orange Tree B C 3h/500℃showed the best performance for ammonia removal with an adsorption capacity of 1.72 mg/*** characterization showed that P=O bonds were formed after the adsoiption of phosphorus by modified BC,N-H bonds were formed after ammonia adsorption.X P S analysis revealed that the key process of ammonia adsorption was the ion exchange between K+and N H *** adsorption was related to oxidation and interaction between PO43-and Fe3+.According to X R D results,ammonia was found in the form of potassium amide,while phosphorus was found in the form of iron hydrogen *** sorption isotherms showed that the Freundlich equation fits better for phosphorus adsorption,while the Langmuir equation fits better for ammonia *** simulated runoff infiltration experiment showed that 97.3%of ammonia was removed by Al-modified Orange tree B C 3h/500℃,and 92.9%of phosphorus was removed by Fe-modified Tea tree B C 2h/400℃.

关键词： Biochar Adsorption Ammonia removal Phosphorus removal Agricultural runoff

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Oxidative Damage to Lung Tissue and Peripheral Blood in Endotracheal PM_(2.5)-treated Rats

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Biomedical and environmental Sciences 2009年第3期22卷 223-228页

作者： ZHI-QING LIN ZHU-GE XI DAN-FENG YANG Fu-HUAN CHAO HUA-SHAN ZHANG WEI ZHANG HUANG-LIANG LIU ZAI-MING YANG RU-BAO SUN Institute of Health and Environmental Medicine Tianjin 300050 China State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control Tianjin 300071 China

Objective To investigate the oxidative damage to lung tissue and peripherial blood in PM2.5-treated rats. Methods PM2.5 samples were collected using an auto-sampling instrument in summer and winter. Treated samples were endotracheally instilled into rats. Activity of reduced glutathione peroxidase （GSH-Px） and concentration of malondialdehyde （MDA） were used as oxidative damage biomarkers of lung tissue and peripheral blood detected with the biochemical method. DNA migration length （μm） and rate of tail were used as DNA damage biomarkers of lung tissue and peripheral blood detected with the biochemical method. Results The activity of GSH-Px and the concentration of MDA in lung tissue significantly decreased after exposure to PM2.5 for 7-14 days. In peripheral blood, the concentration of MDA decreased, but the activity of GSH-Px increased 7 and 14 days after experiments. The two indicators had a dose-effect relation and similar changing tendency in lung tissue and peripheral blood. The DNA migration length （μm） and rate of tail in lung tissue and peripheral blood significantly increased 7 and 14 days after exposure to PM2.5. The two indicators had a dose-effect relation and similar changing tendency in lung tissue and peripheral blood. Conclusion PM2.5 has a definite oxidative effect on lung tissue and peripheral blood. The activity of GSH-Px and the concentration of MDA are valuable biomarkers of oxidative lung tissue damage induced by PM2.5. The DNA migration length （μm） and rate of tail are simple and valuable biomarkers of PM2 5-induced DNA damage in lung tissues and peripheral blood. The degree of DNA damage in peripheral blood can predict the degree of DNA damage in lung tissue.

关键词： PM2.5 Endotracheal instillation Oxidative damage Oxidative DNA damage Biomarker DNA repair

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Hydrogeochemical characteristics and potential risks within a headwater catchment， Taihu Lake Basin， China

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Journal of Earth Science 2024年

作者： Lin Liu Hai Yang Xun Zhou Yuehua Jiang Naizheng Xu Jiangshi Gong Zi Chen Liang Li Jinsong Lv Yang Jin Chinese Academy of Geological Sciences Nanjing Center China Geological Survey Key Laboratory of Watershed Eco-Geological Processes， Ministry of Natural Resources State Environmental Protection Key Laboratory of Source Apportionment and Control of Aquatic Pollution， China University of Geosciences(Wuhan)

The Yuying River catchment is a hilly watershed that serves as a high-quality water source for Taihu Lake. Its hydrochemical characteristics is crucial to the safety of water supplies around Taihu Lake. In order to evaluate the potantial risk to Taihu Lake， samples of rainwater， surface water， and groundwater from the Yuying River catchment were gathered to conduct a comprehensive hydrochemical analysis， the isotope analysis of δ2H， δ18O， and3H. The results showed that the hydrochemical types of the groundwater were mainly HCO3·SO4-Na·Ca and HCO3-Na·Ca. The renewal rate of groundwater in the Yuying River catchment is slightly greater （+10% to +20%） than 34% a-1. The formation process of hydrochemical characteristics was controlled by the process of cation exchange and leaching （mainly based on silicate dissolution）. Combined with historical data， the concentration of NO3-in groundwater of the Yuying River catchment was increased from 2000（4.7 mg/L） to 2019（15.8 mg/L）. Both the constructed land area （increase 377.31%） and NO3-concentration in groundwater （increase 336.17%） elevated about 3 times compared with thoses in 2000. Combined with PCA statistical analysis of nitrate in groundwater of different land use， it was found that the discharge of domestic sewage was the main reason of the abnormal increase of NO3-in the study area. It suggested that the enhanced of human activities （unscientific domestic sewage disposal） has exceeded the self-purification ability of the Yuying river catchment water environment. It is urgent to adopt scientific and effective domestic sewage treatment methods to ensure the water environment and water ecological security of the Yuying river catchment and the downstream Taihu Lake.

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air pollution health burden embodied in China's supply chains

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environmental Science and Ecotechnology 2023年第4期16卷 147-155页

作者： Hongyan Zhao Ruili Wu Yang Liu Jing Cheng Guannan Geng Yixuan Zheng Hezhong Tian Kebin He Qiang Zhang Center for Atmospheric Environmental Studies School of EnvironmentBeijing Normal UniversityBeijing100875China Ministry of Education Key Laboratory for Earth System Modelling Department of Earth System ScienceTsinghua UniversityBeijing100084China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing100084China State Environmental Protection Key Laboratory of Quality Control in Environmental Monitoring China National Environmental Monitoring CentreBeijing100012China Center of Air Quality Simulation and System Analysis Chinese Academy of Environmental PlanningBeijing100012China

Product trade plays an increasing role in relocating production and the associated air pollution impact among sectors and *** a comprehensive depiction of atmospheric pollution redistribution through trade chains is missing,which may hinder targeted clean air cooperation among sectors and ***,we combined five state-of-the-art models from physics,economy,and epidemiology to track the anthropogenic fine particle matters(PM_(2.5))related premature mortality along the supply chains within China in *** results highlight the key sectors that affect PM_(2.5)-related mortality from both production and consumption *** consumption-based effects from food,light industry,equipment,construction,and services sectors,caused 2e22 times higher deaths than those from a production perspective and totally contributed 63%of the national *** a cross-boundary perspective,25.7%of China's PM_(2.5)-related deaths were caused by interprovincial trade,with the largest transfer occurring from the central and northern regions to well-developed east coast *** investment dominated the cross-boundary effect(56%of the total)by involving substantial equipment and construction products,which greatly rely on product exports from regions with specific *** supply chain-based analysis provides a comprehensive quantification and may inform more effective joint-control efforts among associated regions and sectors from a health risk perspective.

关键词： China air pollution Mortality Trade Supply chain

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除尘技术研究进展和袋式除尘ISO标准（英文）

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2018年第1期19卷 21-33页

作者： Cheng-hang ZHENG Chikao KANAOKA State Key Laboratory of Clean Energy Utilization State Environmental Protection Center for Coal-fired Air Pollution Control Zhejiang University Hangzhou 310027 China Kanazawa University Kanazawa 920-1161 Japan

目的:分析当前最新的针对烟气中颗粒物的高效脱除技术,包括静电除尘和袋式除尘的提效方法、原理以及所能达到的效果等;对研究现状进行评述和对未来发展做出展望,并介绍袋式除尘的相关ISO标准。创新点:1.总结了各参数对静电除尘器(包括... 详细信息

目的:分析当前最新的针对烟气中颗粒物的高效脱除技术,包括静电除尘和袋式除尘的提效方法、原理以及所能达到的效果等;对研究现状进行评述和对未来发展做出展望,并介绍袋式除尘的相关ISO标准。创新点:1.总结了各参数对静电除尘器(包括低低温静电除尘、高温静电除尘和湿式静电除尘等)除尘效率的影响;2.分析比较了不同结构形式的滤袋并总结了适应更高过滤要求的新型过滤材料。方法:1.通过数据分析,比较不同粒径、比电阻和温度对静电除尘器除尘效率的影响,并提出相关改进措施;2.比较不同形式滤袋的收尘特点,结合ISO标准和当前工业需求,对袋式除尘进行展望。结论:1.为保证除尘效率,对于不同特性的粉尘,可采取不同形式的静电除尘器增效技术;2.为满足更高的过滤要求,在袋式除尘器方面,急需开发新型过滤材料和优化清灰技术,以适应更高的温度和满足更高的清灰要求。

关键词：除尘静电除尘器滤袋 ISO标准

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Influence of High Relative Humidity on Secondary Organic Carbon: Observations at a Background Site in East China

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Journal of Meteorological Research 2019年第5期33卷 905-913页

作者： Linlin LIANG Guenter ENGLING Yuan CHENG Xiaoye ZHANG Junying SUN Wanyun XU Chang LIU Gen ZHANG Hui XU Xuyan LIU Qianli MA State Key Laboratory of Severe Weather&Key Laboratory for Atmospheric Chemistry Chinese Academy of Meteorological SciencesChina Meteorological AdministrationBeijing 100081China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084China Division of Atmospheric Sciences Desert Research InstituteRenoNV 89512USA California Air Resources Board CA 91731USA School of Environment Harbin Institute of TechnologyHarbin 150001China National Satellite Meteorological Center China Meteorological AdministrationBeijing 100081China Lin'an Regional Atmosphere Background Station Lin'an 311307China

To investigate the impacts of relative humidity(RH) on secondary organic aerosol(SOA) concentrations and chemical reactions, the carbonaceous aerosol components [i.e., organic carbon(OC) and element carbon(EC)] were quantified in daily PM2.5 samples collected at a background site in East China during summer 2015. Based on the method of EC-tracer, the concentration of secondary organic carbon(SOC) demonstrated an obvious negative relationship with RH higher than 60%. Moreover, the ratio of SOC/EC also exhibited obvious decreasing trends with increasing RH, indicating negative effects for chemical production of SOA under high RH conditions. Due to high RH,photochemistry was weakened, gaseous oxidant concentrations was lowered(e.g., significantly decreased O3 levels),and the production rates of SOA were relatively low. On the other hand, because of more water uptake under higher RH conditions, the aerosol droplet acidity was reduced and enhancement of SOA formation by acidity was accordingly absent. In addition, high RH also plays an important role in changing viscosity of pre-existing aerosol coatings,which can affect reactive uptake yield of SOA. Overall, the results from this study imply that SOA production may be more associated with photochemical processes, while aqueous-phase chemistry is not very important for some SOA formation in a moist ambient environment. In the ambient atmosphere, oxidant concentrations, reaction rates,airborne species, etc., are highly variable. How do these factors affect SOA yields under given ambient environment warrants further detailed investigations.

关键词： relative humidity organic aerosol secondary organic carbon(SOC) photochemistry aqueous-phase

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