检索结果-内蒙古大学图书馆

Highly spatial and temporal bottom-up vehicle emission characterization and its control in a typical ecology-preservation area

引用

Eco-Environment & Health 2022年第3期1卷 156-164页

作者： Pengju Bie Fanyuan Deng Bi Chen Li Wang Fan Yang Jianguo Zhou Huan Liu Kebin He State Key Joint Laboratory of ESPC State Environmental Protection Key Laboratory of Sources and Control of Air Pollution ComplexSchool of EnvironmentInternational Joint Laboratory on Low Carbon Clean Energy InnovationTsinghua UniversityBeijing 100084China Technique Center of Kweichow Moutai Co.Ltd. Renhuai 564501China

The Chishui River Valley is a microscale ecology-preservation area with industrial *** significance of evaluating vehicular emissions has been gradually highlighted with the rapid development of the local transportation and tourism *** study provides the first estimates based on both bottom-up and top-down *** annual total emissions of CO,NOx,hydrocarbons(HC),PM10,and PM2.5 in 2019 were 347.8,189.6,46.3,6.9,and 6.3 Mg,*** contributed the most(55%)to the NOx emissions,followed by heavy-duty passenger vehicles(26%).In contrast,light-duty passenger vehicles and motorcycles generated 75%of the HC *** superior accuracy of highly spatial and temporal bottom-up estimates versus top-down estimates is validated by the similar variation trends of hourly emission intensities and enhanced concentrations relative to background observations for both NOx and CO,with Pearson correlation coefficients between the intensities and concentrations ranging from 0.79 to *** HC emissions peaked in 2013,followed by a sharp decline in 2014 and a continuous rise since then,whereas NOx emissions have kept increasing since *** indicated the necessity and urgency of effective vehicular emission *** on scenario analysis,traffic restrictions combined with upgrading the emission standards of admitted vehicles will possess huge emission reduction *** recommendations about establishing a low emission zone in the valley and supporting policies were introduced.

关键词： Vehicle Emission Bottom-up method Ecology-preservation Mitigation Low-emission zone

来源：评论

学校读者我要写书评

暂无评论

Observation-based sources evolution of non-methane hydrocarbons (NMHCs) in a megacity of China

引用

Journal of environmental Sciences 2023年第2期124卷 794-805页

作者： Yarong Peng Hongli Wang Qian Wang Shengao Jing Jingyu An Yaqin Gao Cheng Huang Rusha Yan Haixia Dai Tiantao Cheng Qiang Zhang Meng Li Jianlin Hu Zhihao Shi Li Li Shengrong Lou Shikang Tao Qinyao Hu Jun Lu Changhong Chen Department of Environmental Science and Engineering Shanghai Key Laboratory of Atmospheric Particle Pollution and PreventionInstitute of Atmospheric SciencesFudan UniversityShanghai 200438China State Environmental Protection Key Laboratory of Formation and Prevention of Urban Air Pollution Complex Shanghai Academy of Environmental SciencesShanghai 200233China Department of Atmospheric and Oceanic Sciences Institute of Atmospheric SciencesFudan UniversityShanghai 200438China Department of Earth System Science Ministry of Education Key Laboratory for Earth System ModelingTsinghua UniversityBeijing 100084China Big Data Institute for Carbon Emission and Environmental Pollution Fudan UniversityShanghai 200438China School of Environmental Science and Engineering Nanjing University of Information Science&TechnologyNanjing 210044China

Both concentrations and emissions of many air pollutants have been decreasing due to implement of control measures in China,in contrast to the fact that an increase in emissions of non-methane hydrocarbons(NMHCs)has been *** study employed seven years continuous NMHCsmeasurements and the related activities data of Shanghai,a megacity in China,to explore evolution of emissions and effectiveness of air pollution control *** mixing ratio of NMHCs showed no statistical interannual changes,of which their compositions exhibited marked *** resulted in a decreasing trend of ozone formation potential by 3.8%/year(p<0.05,the same below),which should be beneficial to ozone pollution mitigation as its production in Shanghai is in the NMHCs-limited *** alkanes,aromatics and acetylene changed by+3.7%/year,-5.9%/year and-7.4%/year,respectively,and alkenes showed no apparent *** sources were apportioned by a positive matrix factorization ***,vehicular emissions(-5.9%/year)and petrochemical industry emissions(-7.1%/year)decreased significantly,but the decrease slowed down;significant reduction in solvent usage(-9.0%/year)appeared after 2010;however,emissions of natural gas(+12.6%/year)and fuel evaporation(with an increasing fraction)became more *** inconsistency between observations and inventories was found in interannual trend and speciation as well as source contributions,emphasizing the need for further validation in NMHCs emission *** study confirms the effectiveness of measures targeting mobile and centralized emissions from industrial sources and reveals a need focusing on fugitive emissions,which provided new insights into future air policies in polluted region.

关键词： Characteristics source apportionment Observation-based Interannual trend Shanghai

来源：评论

学校读者我要写书评

暂无评论

Phosphorus losses via surface runoff in rice-wheat cropping systems as impacted by rainfall regimes and fertilizer applications

引用

Journal of Integrative Agriculture 2016年第3期15卷 667-677页

作者： LIU Jian ZUO Qiang ZHAI Li-mei LUO Chun-yan LIU Hong-bin WANG Hong-yuan LIU Shen ZOU Guo-yuan REN Tian-zhi Key Laboratory of Nonpoint Source Pollution Control Ministry of AgricultureInstitute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Department of Plant Science Pennsylvania State University Institute of Plant Nutrition and Resources Beijing Academy of Agriculture and Forestry Sciences Institute of Agro-Environmental Protection Ministry of Agriculture

Phosphorus（P） losses from agricultural soils contribute to eutrophication of surface waters. This field plot study investigated effects of rainfall regimes and P applications on P loss by surface runoff from rice（Oryza sativa L.） and wheat（Triticum aestivum L.） cropping systems in Lake Taihu region, China. The study was conducted on two types of paddy soils（Hydromorphic at Anzhen site, Wuxi City, and Degleyed at Xinzhuang site, Changshu City, Jiangsu Province） with different P status, and it covered 3 years with low, high and normal rainfall regimes. Four rates of mineral P fertilizer, i.e., no P（control）, 30 kg P ha^（–1） for rice and 20 kg P ha^（–1） for wheat（P_（30＋20））, 75 plus 40（P_（75＋40））, and 150 plus 80（P_（150＋80））, were applied as treatments. Runoff water from individual plots and runoff events was recorded and analyzed for total P and dissolved reactive P concentrations. Losses of total P and dissolved reactive P significantly increased with rainfall depth and P rates（P〈0.0001）. Annual total P losses ranged from 0.36–0.92 kg ha^–1 in control to 1.13–4.67 kg ha^–1 in P150＋80 at Anzhen, and correspondingly from 0.36–0.48 kg h^–1 to 1.26–1.88 kg ha^–1 at Xinzhuang, with 16–49% of total P as dissolved reactive P. In particular, large amounts of P were lost during heavy rainfall events that occurred shortly after P applications at Anzhen. On average of all P treatments, rice growing season constituted 37–86% of annual total P loss at Anzhen and 28–44% of that at Xinzhuang. In both crop seasons, P concentrations peaked in the first runoff events and decreased with time. During rice growing season, runoff P concentrations positively correlated（P〈0.0001） with P concentrations in field ponding water that was intentionally enclosed by construction of field bund. The relative high P loss during wheat growing season at Xinzhuang was due to high soil P status. In conclusion, P should be applied at rates balancing crop removal（20–30 kg P ha^–1 in this study） and at time

关键词： double cropping system intensive agriculture Lake Taihu region phosphorus loss surface runoff water quality

来源：评论

学校读者我要写书评

暂无评论

Peracetic acid catalytic activation using Co_(3)O_(4) nanocluster decorated graphitic carbon nitride for cefapirin degradation in water

引用

Science China(Technological Sciences) 2024年第10期67卷 3103-3115页

作者： YIN ShiMei GAO YiXuan CHEN Long LI Fan LIU XiaoNa QI Fei LIU Wen Beijing Key Lab for Source Control Technology of Water Pollution College of Environmental Science and EngineeringBeijing Forestry UniversityBeijing 100083China Key Laboratory of Water and Sediment Sciences(Ministry of Education) College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China School of Environmental Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China State Environmental Protection Key Laboratory of All Material Fluxes in River Ecosystems Peking UniversityBeijing 100871China Beijing National Laboratory for Molecular Sciences Peking UniversityBeijing 100871China

This study innovated cobalt-based catalytic nanocomposites(CCNs)for the heterogeneous activation of peracetic acid(PAA),a green and efficient advanced oxidation process for removing antibiotics from *** Co_(3)O_(4) catalysts exhibit limited activity due to stable electronic *** overcome this,CCNs were synthesized using a one-step condensation method,incorporating a size control strategy that anchors Co_(3)O_(4) nanoclusters within 4‒5 nm onto six-fold cavity of g-C3N4,simultaneously modifying the coordination environment of *** alteration significantly enhances the adsorption energy of PAA and catalytic activity compared to commercial Co_(3)O_(4).The improved performance of CCN2,in particular,is attributed to a shift in the cobalt d band center towards the Fermi level,facilitating electron delocalization and transfer,enhancing Co‒O bonding,and accelerating PAA ***2’s superior activity,with a cefapirin(CFP)degradation kinetic rate constant(k1=0.760 min^(−1))~11 times that of PAA direct oxidation(k1=0.070 min^(−1))and~5 times that of commercial Co_(3)O_(4)/PAA system(k1=0.164 min^(−1)),is due to its ability to generate dominant reactive species for antibiotic degradation,including alkoxy radicals(CH3C(=O)OO•),high valence metal(Co^(Ⅳ)(=O)^(2+)),and singlet oxygen(^(1)O_(2)),with the latter two being crucial for the degradation *** degradation of CFP involved three mechanisms,including direct oxidation by PAA,decarboxylation,and open-ring reactions at nitrogen *** research provides insights into developing high-activity catalysts for efficient PAA activation and antibiotic removal,leveraging the strategy of shifting the transition metal d band center.

关键词： peracetic acid Co_(3)O_(4)nanocluster high valence metal singlet oxygen cefapirin

来源：评论

学校读者我要写书评

暂无评论

Application of a new reagent O-(2-methylpropyl) N-prop-2-enylcarbamothioate in industrial purification of zinc sulfides: Mechanistic study

引用

Minerals Engineering 2025年 231卷

作者： Hongliang Zhang Wei Sun Fangshuo Wang Zhenhui Xie Jianxi Zeng Zhen Hu Shangyong Lin School of Minerals Processing and Bioengineering Central South University Changsha 410083 China Huangshaping Mining of Hunan Nonferrous Metals Stock Company Chenzhou 424421 China State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control Wuhan University of Science and Technology Wuhuan 430081 China Zhongyuan Critical Metals Laboratory Zhenzhou 450001 China State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Kunming 650093 China

Zinc sulfides, as crucial resources for obtaining metal zinc, frequently coexisting with pyrite and being separated in alkaline pulp. However, the alkaline pulp poses a significant environmental burden. In response, the alkali-free zinc beneficiation reagent system is developed. Herein, findings from solution chemistry analysis favors the classical surface deposition mode of activator Cu(II) on sphalerite. However, adsorption capacity studies reveal that this mode is exclusive to alkaline pulp with pH exceeding 9.5. In neutral pulp, Cu(II) prefers the ion-exchange adsorption mode. DFT calculations further underscore that the Cu(II) ion-exchanged on sphalerite serves as a target for the interfacial adsorption of collector O-(2-methylpropyl) N-prop-2-enylcarbamothioate (MPECT). Notably, the energy selectivity index (ESI) for the adsorption of MPECT and H 2 O molecule at the Cu target is 15.63 %, significantly surpassing the 3.82 % observed in direct adsorption at the Zn site. In addition, XPS confirmed that after the modification of the sphalerite by Cu(II), some of the surface-attached Cu 2+ cations were reduced to Cu + cations by S 2− anions. This valence state composition, which is similar to that of covellite, facilitates the interfacial adsorption of MPECT. This work sheds a solid theoretical foundation and practical reference for the alkali-free beneficiation of zinc sulfide minerals.

关键词： Metal analysis

来源：评论

学校读者我要写书评

暂无评论

Deciphering decadal urban ozone trends from historical records since 1980

引用

National Science Review 2024年第11期11卷 117-129页

作者： Haolin Wang Xiao Lu Paul I.Palmer Lin Zhang Keding Lu Ke Li Tatsuya Nagashima Ja-Ho Koo Hiroshi Tanimoto Haichao Wang Meng Gao Cheng He Kai Wu Shaojia Fan Yuanhang Zhang School of Atmospheric Sciences Sun Yat-sen University and Key Laboratory of Tropical Atmosphere-Ocean System Ministry of Education Guangdong Provincial Observation and Research Station for Climate Environment and Air Quality Change in the Pearl River Estuary Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) School of Geo Sciences University of Edinburgh National Centre for Earth Observation University of Edinburgh Laboratory for Climate and Ocean-Atmosphere Studies Department of Atmospheric and Oceanic SciencesSchool of PhysicsPeking University State Key Joint Laboratory of Environmental Simulation and Pollution Control The State Environmental Protection Key Laboratory of Atmospheric Ozone Pollution ControlCollege of Environmental Sciences and Engineering Peking University Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Collaborative Innovation Center of Atmospheric Environment and Equipment Technology School of Environmental Science and Engineering Nanjing University of Information Science &Technology National Institute for Environmental Studies Department of Atmospheric Sciences Yonsei University Department of Geography Hong Kong Baptist University Department of Civil and Environmental Engineering University of California

Ozone pollution is a major environmental threat to human health. Timely assessment of ozone trends is crucial for informing environmental policy. Here we show that for the most recent decade（2013–2022） in the northern hemisphere, warm-season（April–September） mean daily 8-h average maximum ozone increases much faster in urban regions with top ozone levels(mainly in the North China Plain, 1.2 ± 1.3 ppbv year-1) than in other, low-ozone regions(0.2 ± 0.9 ppbv year-1). These trends widen the ozone differences across urban regions, and increase extreme pollution levels and health threats from a global perspective. Comparison of historical trends in different urban regions reveals that ozone increases in China during 2013–2022 differ in magnitude and mechanisms to historical periods in other regions since *** reflects a unique chemical environment characterized by exceptionally high nitrogen oxides and aerosol concentrations, where reducing ozone precursor emissions leads to substantial ozone *** increase in China has slowed down in 2018–2022 compared to 2013–2017, driven by ongoing emission reductions, but with ozone-favorable weather conditions. Historical ozone evolution in Japan and South Korea indicates that ozone increases should be suppressed with continuous emission *** temperature and associated wildfires have also reversed ozone decreases in the USA and Europe,with anthropogenic ozone control slowing down in recent decades.

关键词： air quality surface ozone trends

来源：评论

学校读者我要写书评

暂无评论

Flow in Porous Media in the Energy Transition

引用

Engineering 2022年第7期8卷 10-14页

作者： Martin J.Blunt Qingyang Lin Department of Earth Science and Engineering Imperial College LondonLondon SW72BPUK State Key Laboratory of Clean Energy Utilization State Environmental ProtectionEngineering Center for Coal-Fired Air Pollution ControlZhejiang UniversityHangzhou 310027China

*** context Flow in porous media is encountered in a wide variety of natural and engineered settings,including gas exchange in lungs and blood vessels,water extraction from underground aquifers,hydrocarbon production,and microfluidics in drug delivery and food *** rock is a porous medium that holds water and hydrocarbons,and is a potential storage site for carbon dioxide(CO_(2))and *** manufactured devices also contain porous media to allow the transport of gases and water,including fuel cells,electrolyzers,and electrocatalysts for CO_(2) *** performance is limited by how rapidly two fluid phases can flow through a porous layer.

关键词： underground rock setting

来源：评论

学校读者我要写书评

暂无评论

Ambient fine particulate matter and ozone pollution in China: synergy in anthropogenic emissions and atmospheric processes

引用

environmental Research Letters 2022年第12期17卷 123001-123001页

作者： Jiang, Yueqi Wang, Shuxiao Xing, Jia Zhao, Bin Li, Shengyue Chang, Xing Zhang, Shuping Dong, Zhaoxin State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing100084 China

Since 2013, China has taken a series of actions to relieve serious PM2.5 pollution. As a result, the annual PM2.5 concentration decreased by more than 50% from 2013 to 2021. However, ozone pollution has become more pronounced, especially in the North China Plain. Here, we review the impacts of anthropogenic emissions, meteorology, and atmospheric processes on ambient PM2.5 loading and components and O3 pollution in China. The reported influence of interannual meteorological changes on PM2.5 and O3 pollution during 2013-2019 ranged from 10%-20% and 20%-40%, respectively. During the same period, the anthropogenic emissions of NO x , SO2, primary PM2.5, NMVOC and NH3 are estimated to decrease by 38%, 51%, 35%, 11% and 17%, respectively. Such emission reduction is the main cause for the decrease in PM2.5 concentration across China. However, the imbalanced reductions in various precursors also result in the variation in nitrate gas-particle partitioning and hence an increase in the nitrate fraction in PM2.5. The increase of ozone concentration and the enhancement of atmospheric oxidation capacity can also have substantial impact on the secondary components of PM2.5, which partly explained the growth of organic aerosols during haze events and the COVID-19 shutdown period. The uneven reduction in NO x and NMVOC is suggested to be the most important reason for the rapid O3 increase after 2013. In addition, the decrease in PM2.5 may also have affected O3 formation via radiation effects and heterogeneous reactions. Moreover, climate change is expected to influence both anthropogenic emissions and atmospheric processes. However, the extent and pathways of the PM2.5-O3 interplay and how it will be impacted by the changing emission and atmospheric conditions making the synergetic control of PM2.5 and O3 difficult. Further research on the interaction of PM2.5 and O3 is needed to provide basis for a scientifically-grounded and effective co-control strategy. © 2022 The Author(s). P

关键词： Nitrates

来源：评论

学校读者我要写书评

暂无评论

Modeling the dynamic impacts of maritime network blockage on global supply chains

引用

The Innovation 2024年第4期5卷 103-109,102页

作者： Shen Qu Yunlei She Qi Zhou Jasper Verschuur Lu-Tao Zhao Huan Liu Ming Xu Yi-Ming Wei Center for Energy and Environmental Policy Research Beijing Institute of TechnologyBeijing 100081China School of Management Beijing Institute of TechnologyBeijing 100081China Beijing Key Lab of Energy Economics and Environmental Management Beijing 100081China Oxford Programme for Sustainable Infrastructure Systems(OPSIS) Environmental Change InstituteUniversity of OxfordOX12JD OxfordUK State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084China School of Environment Tsinghua UniversityBeijing 100084China

Recent phenomena such as pandemics,geopolitical tensions,and climate change-induced extreme weather events have caused transportation network interruptions,revealing vulnerabilities in the global supply chain.A salient example is the March 2021 Suez Canal blockage,which delayed 432 vessels carrying cargo valued at$92.7 billion,triggering widespread supply chain *** ability to model the spatiotemporal ramifications of such incidents remains *** fill this gap,we develop an agent-based complex network model integrated with frequently updated maritime *** Suez Canal blockage is taken as a case *** results indicate that the effects of such blockages go beyond the directly affected countries and *** Suez Canal blockage led to global losses of about$136.9($127.5–$147.3)billion,with India suffering 75%of these *** losses show a nonlinear relationship with the duration of blockage and exhibit intricate trends post *** proposed model can be applied to diverse blockage scenarios,potentially acting as an earlyalert system for the ensuing supply chain ***,high-resolution daily data post blockage offer valuable insights that can help nations and industries enhance their resilience against similar future events.

关键词： chains valued extreme

来源：评论

学校读者我要写书评

暂无评论

Inventory Research of Greenhouse Gas about Energy Sector Activities in Jiangsu Province and Analysis on Relevant Problems

引用

Meteorological and environmental Research 2014年第6期5卷 54-56,60页

作者： Zuo Yi Wang Sheng Yang Guangjun State Power Environmental Protection Research Institute State Environmental Protection Key Laboratory of Atmospheric Physical Modeling and Control of Air Pollution

The emission of greenhouse gas generated by energy activity had the maximum influence on total emission. We introduced research content and method of inventory for greenhouse gas generated by energy activity in Jiangsu in 2005 and 2010, and obtained finial results. According to the sum of green gas emission from various parts, greenhouse gas emission of energy activity in Jiangsu occupied 76% -79% of total emission in 2005 and 2010. Meanwhile, the problems encountering in preparation process of inventory were summed and deeply analyzed, such as data ob- taining and processing, inconsistent statistical channel and actual measurement of emission factor. Finally, some suggestions about carrying out provincial greenhouse gas inventory work of energy activity in the future were put forward.

关键词： Energy activities Greenhouse gas Emission inventory Jiangsu Province China

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：