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8th International Conference on Computing and Data Engineering, ICCDE 2022

作者： Yang, Xin Li, Yongping Huang, Guohe State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal University Beijing100875 China Institute for Energy Environment and Sustainable Communities University of Regina ReginaSKS4S 0A2 Canada

ISBN: (纸本)9781450395717

In this study, a Bayesian copula-based spatial-temporal analysis (BCSA) method is developed for multivariate drought risk analysis. BCSA can help identify drought variables and to build dependent structure of variables (duration-severity and severity-area). BCSA was applied to a real case in Central Asia (1918-2018). Some major findings can be summarized: (i) Central Asia suffered 72 droughts in 1918-2018, and droughts are mainly concentrated in Karaganda and Kyzylorda states of Kazakhstan;(ii) drought is more frequent in spring and summer than autumn and winter;(iii) due to interaction effect on variables, joint guarantee rate is less than design guarantee rate, and joint guarantee rate can provide a new reference for drought project design;(v) when design dependability is 0.99, 0.98, 0.95, 0.90 and 0.80, multivariate drought risk would be 3%g1/47%, 6%g1/414%, 13%g1/427%, 23%g1/439% and 35%g1/452%, respectively. The above findings can provide decision support for drought mitigation and project management. © 2022 ACM.

关键词： Drought

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Targeting Ultra-Emitters for Effective Methane Mitigation in China’s Coal Sector

ACS ES&T Air

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ACS ES&T Air 2024年第7期1卷 734-742页

作者： Helan Wang Bo Zheng Hui Li Qiang Zhang Kebin He Shenzhen Key Laboratory of Ecological Remediation and Carbon Sequestration Institute of Environment and Ecology Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen 518055 China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084 China Department of Earth System Science Ministry of Education Key Laboratory for Earth System Modeling Institute for Global Change Studies Tsinghua University Beijing 100084 China State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084 China

The energy system fuels climate change as the largest emitter of global greenhouse gases, while a lack of transparent, infrastructure-level information undermines efforts to cut emissions. Coal mining has been the largest emitter of methane (CH4) in China over the past 10 years, which is not tracked at the mine level, and effective mitigation pathways have yet to be established. Herein, we develop a state-of-the-art CH4emission database, comprising 3343 active coal mines in China, by harmonizing multisource information. The results suggest that China’s coal mines emitted 15.8 ± 5.1 million metric tons CH4yr–1in 2019. Those with CH4emission intensities >2 standard deviations above the national mean accounted for 4% of China’s coal production, yet they generated 23% of China’s coal CH4emissions. We project a steady decline in China’s coal CH4emissions by >75% in 2100 compared to 2019 levels under three different scenarios, due to reduced coal demand during energy transition. Targeting ultra-emitters for mine closure will accelerate emission reductions in the midterm and achieve deep CH4emission cuts by >92% in 2100, which buys us time to control global warming. Our idealized mine closure strategy serves as a cost-effective CH4mitigation strategy to enable swift climate action.

关键词： Biological databases Climate Coal Energy Hydrocarbons

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Enhancement of the polynomial functions response surface model for real-time analyzing ozone sensitivity

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Frontiers of environmental Science & Engineering 2021年第2期15卷 155-168页

作者： Jiangbo Jin Yun Zhu Jicheng Jang Shuxiao Wang Jia Xing Pen-Chi Chiang Shaojia Fan Shicheng Long Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control College of Environment and EnergySouth China University of TechnologyGuangzhou Higher Education Mega CenterGuangzhou 510006China Southern Marine Science and Engineering Guangdong Laboratory Sun Yat-Sen UniversityZhuhai 519000China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China Graduate Institute of Environmental Engineering Taiwan UniversityTaipei 10673China Carbon Cycle Research Center Taiwan UniversityTaipei 10672China

Quantification of the nonlinearities between ambient ozone(O3)and the emissions of nitrogen oxides(NOx)and volatile organic compound(VOC)is a prerequisite for an effective O3 control *** Enhanced polynomial functions Response Surface Model(Epf-RSM)with the capability to analyze O3-NOx-VOC sensitivities in real time was developed by integrating the hill-climbing adaptive method into the optimized Extended Response Surface Model(ERSM)*** Epf-RSM could single out the best suited polynomial function for each grid cell to quantify the responses of O3 concentrations to precursor emission *** comparisons between Epf-RSM and pf-ERSM(polynomial functions based ERSM)were performed using out-of-sample validation,together with comparisons of the spatial distribution and the Empirical Kinetic Modeling Approach *** comparison results showed that Epf-RSM effectively addressed the drawbacks of pf-ERSM with respect to overfitting in the margin areas and high biases in the transition *** O3 concentrations predicted by Epf-RSM agreed well with Community Multi-scale Air Quality simulation *** case study results in the Pearl River Delta and the north-western area of the Shandong province indicated that the O3 formations in the central areas of both the regions were more sensitive to anthropogenic VOC in January,April,and October,while more NOx-sensitive in July.

关键词： Response surface model Hill-climbing algorithm Ozone pollution Precursor emissions control strategy

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Analysis of the Drivers of Premature Death and Life Expectancy Reduction Associated with Global Pm2.5 pollution

SSRN

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SSRN 2023年

作者： Wu, Dongdong State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal University Xinjiekouwai Street No. 19 Beijing100875 China

Quantitative assessment of the health risks due to PM2.5 is a global concern. This study systematically assessed the impact of PM2.5 on global and regional premature death and per capita life expectancy reduction (LER) from 1995-2019. The number of premature death due to PM2.5 increased from 3.25 million to 4.56 million during the study period;while the per capita life expectancy reduction increased from 0.91 to 1.03 years before decreasing to 0.95 years. The number of deaths and LER were declining in Europe and North America, while the opposite was observed in Asian and African countries. Population and age structure were pulling factors for premature death, with population contributing more to African countries (90%), while other countries were more susceptible to age structure;PM2.5 concentration was a puller and then a suppressor for both premature death and LER, and the medical level was always a suppressor. All countries should take action and cooperate to reduce the harmful effects of PM2.5 pollution on humans. (Image Presented) © 2023, The Authors. All rights reserved.

关键词： Health risks

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Organosulfur Compounds in Ambient Fine Particulate Matter in an Urban Region: Findings of a Nontargeted Approach

SSRN

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SSRN 2023年

作者： Li, Ailin Shi, Xiaodi Qiu, Xinghua Wei, Gaoyuan Zheng, Yan Chen, Qi Chen, Shiyi Hu, Min Zhu, Tong State Key Joint Laboratory for Environmental Simulation and Pollution Control College of Environmental Sciences and Engineering Center for Environment and Health Peking University Beijing100871 China

Organosulfur compounds (OSCs) are important components of fine particulate matter (PM2.5);however, little information is available on OSCs in urban regions due to their chemical complexity. In this study, we developed a nontargeted approach based on gas chromatography and high-resolution mass spectrometry (GC-HRMS) to screen OSCs in PM2.5 of urban Beijing. Seventy-six OSCs were found through mass difference of sulfur isotopes and characteristic sulfur-containing fragments. Six species were confirmed as aromatic sulfonates by authentic standards. Most OSCs showed higher levels in the heating season, presumably because of the intensive emission especially from coal combustion. While certain species, with 2-sulfobenzoic acid as the representative, were more abundant in the non-heating season. Such species were significantly correlated with ozone and aerosol liquid water content, implying an oxidation-involved aqueous-phase formation in the atmosphere. The predominance of the 2-substitution product over its isomer of 3- or 4-sulfobenzoic acid suggests a more plausible mechanism of ring-opening of naphthalene followed by sulfonation, with atmospheric reactivity indicated by ozone and temperature as the determining factor. This study provided not only a nontargeted approach for OSCs in ambient PM2.5, but also field evidence on their secondary formation proposed in previous simulation studies. © 2023, The Authors. All rights reserved.

关键词： Naphthalene

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Direct visualisation of metal-defect cooperative catalysis in Ru-doped defective MOF-808

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Journal of Materials Chemistry A 2024年第30期12卷 19018-19028页

作者： Xu, Chirui Orbell, William Wang, Guilian Li, Boye Ng, Bryan K. Y. Wu, Tai-Sing Soo, Yun-Liang Luan, Zhao-Xue Tang, Kangjian Wu, Xin-Ping Tsang, S. C. Edman Zhao, Pu Innovation Center for Chemical Science College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou215123 China Department of Chemistry University of Oxford OxfordOX1 3QR United Kingdom State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China National Synchrotron Radiation Research Center Hsinchu30076 Taiwan Department of Physics National Tsing Hua University Hsin-chu30013 Taiwan State Key Laboratory of Green Chemical Engineering and Industrial Catalysis Centre for Computational Chemistry Research Institute of Industrial Catalysis School of Chemistry and Molecular Engineering East China University of Science and Technology Shanghai200237 China

Improving the efficiency of catalytic materials is vital to the chemical and energy industries. Constructing neighbouring active sites in metal-organic framework (MOF) materials for cooperative catalysis is a promising way to achieve the above goal. However, it is difficult to fine-tune active sites at the atomic level due to the challenge of visualising their local structures and their interaction with substrates. In this article, we report the direct visualisation of metal and defect active sites and binding of the phenol substrate in Ru-doped defective MOF-808. X-ray absorption spectroscopy, X-ray pair distribution function analysis, X-ray powder diffraction, and infrared spectroscopy reveal that the enhanced selective hydrogenation originates from the specific adsorption geometry of phenol over 7-centred Ru clusters and hydroxyl or water of defect sites. This mechanism also well explains the high catalytic activity in CO2 reduction. This work represents the first example of structural elucidation of metal-defect cooperative catalysis in MOFs and will lead to the rational design of new superactive MOF catalysts. © 2024 The Royal Society of Chemistry.

关键词： Substrates

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Optimized local geometry and electronic structure of MoO3/CeO2 catalyst by adding copper cations for boosted nitrogen oxide reduction performance

引用

Applied Catalysis B: environmental 2023年第1期332卷

作者： Liu, Hao Gao, Chuan Chen, Jianjun Mi, Jinxing Yang, Shan Chen, Deli Si, Wenzhe Peng, Yue Sun, Chuanzhi Li, Junhua State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China College of Chemistry Chemical Engineering and Materials Science Shandong Normal University Jinan250014 China

The construction of highly active centers over the CeO2-based catalyst for the low-temperature NH3 selective catalytic reduction of nitrogen oxides (NH3–SCR) technology in non-power industry is one of the challenges in the application field. Herein, the SCR performance of MoO3/CeO2 catalyst has been remarkably enhanced by introducing Cu to induce the generation of active Mo[dbnd]O structure. Advanced spectroscopy characterizations reveal that the adding of Cu into MoO3/CeO2 catalyst could create unsaturated sites on CeO2 for Mo anchor, and the enhanced electrons transfer from Mo to Cu would cause the formation of a new terminal Mo[dbnd]O with highly distorted octahedral geometry, which is a new Lewis acid site for coordinated NH3 production. Meanwhile, the added Cu creates the adsorbed site for gaseous NO and the formed Mo-O-Cu pair center facilitates the transformation of ionic NO2– generated from NO adsorption to NO2, which is conducive to the fast SCR reaction process. © 2023 Elsevier B.V.

关键词： Cerium oxide

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Analysis of the Drivers of Premature Death and Life Expectancy Reduction Associated with Global Pm2.5 pollution

SSRN

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SSRN 2023年

作者： Wu, Dongdong State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal University Xinjiekouwai Street No. 19 Beijing100875 China

关键词： Health risks

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Supply-side drivers of phosphorus emissions from phosphorus supply chains in China

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Ecosystem Health and Sustainability 2022年第1期8卷 523-533页

作者： Jing Zhang Qiumeng Zhong Yadong Yu Jetashree Xuechun Yang Cuiyang Feng Hui Li Sai Liang State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentBeijing Normal UniversityBeijingChina Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education School of EcologyEnvironment and ResourcesGuangdong University of TechnologyGuangzhouGuangdongChina School of Business East China University of Science and TechnologyShanghaiChina Institute of Circular Economy Beijing University of TechnologyBeijingChina School of Management China University of Mining&Technology(Beijing)BeijingChina

Human activities interfere with natural Phosphorus(P)cycles by introducing increased levels of P emissions to air,land,and water.A supply-side analysis of P supply chains and associated P emissions can provide insights into underlying economic activities and transitions responsible for human-induced P *** the China's Mainland as the case,this study constructs time-series physical input-output tables to describe P supply chains during ***,it identifies critical products and influencing factors of P supply chains enabling P emissions to the environment(including air,land,and water)from the supply *** results show that phosphate rock,an important initial supplier of P from natural environment to China’s P supply chain,was responsible for 86%of P emissions in ***,food crops and livestock are important initial suppliers of P from soil to China’s P supply chain,through cultivation and pasturing,*** 1949 to 2012,the change in primary input level was the largest driver of P emission increments,followed by changes in population,emission intensity,and primary input *** the contrary,changes in production structure reduced P *** findings could support supply-side policy decisions on P emission control.

关键词： Phosphorus input-output analysis structural decomposition analysis supply chain primary input

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Urban food-energy-water nexus:a case study in Beijing

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Chinese Journal of Population,Resources and environment 2021年第3期19卷 274-282页

作者： Xinqing Li Lixiao Zhang Pengpeng Zhang Yan Hao Xin Xiong State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnviromentBeijing Normal UniversityBeijing100875China

Food,energy and water(FEW)are indispensable,irreplaceable and safeguarding resources with tangled interlinkages among each other,often framed in terms of‘nexus’.Cities have become the bustling hubs of resource consumption and production,facing the most intense ***,food security,fresh water shortage and fossil energy exhaustion have become the greatest challenge for the sustainable development of cities in the *** analysis and simulation of dynamic evolution of urban FEW demand and supply and its nexus would add significant and practical value for macro-management such as ensuring the security of urban *** Beijing as the case study,we established a dynamic model for the FEW demand and supply from the perspective of cross-ectoral and cross-regional nexus with the Stella modelling platform,then it was run for simulating the dynamic changes and nexus characteristics of FEW during the interval between 2016 and *** results showed that:①The gap between local production and demand of these three resources in Beijing will continue to *** 2035,Beijing will need 2.16 million tons of grain,0.83 million tons of meat,4.6 billion m3 of water and 91.65 million tons of standard coal of energy while the resources produced and supplied by locality independently will be 0.21 million tons,0.23 million tons,3.3 billion cubic meters and 16.5 million tons of standard coal *** has to draw on cross-boundary production to meet FEW-use with the increasing gap between local supply and demand.②There is a developing trend of the absolute quantity of interaction among ***,the‘outsourcing’feature is obvious and the indigenous nexus links of three resources are shifting to back-end supply chain such as transportation and treatment.③The change of nexus indexes are mainly affected by the mutual and strong dependence between food and *** and energy depend more and more on each other;in contrast,the inter-relationshi

关键词： Food-energy-water(FEW) Nexus Dynamic simulation Stella

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