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Significant contribution of spring northwest transport to volatile organic compounds in Beijing

Journal of environmental Sciences 2021年第6期33卷 169-181页

作者： Dan Yao Guiqian Tang Yinghong Wang Yuan Yang Lili Wang Tianzeng Chen 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 University of Chinese Academy of Sciences Beijing 100049China

High values of ozone(O_(3))occur frequently in the dry spring season;thus,understanding the evolution characteristics of volatile organic compounds(VOCs)in spring is of great significance for preventing O_(3)*** this study,a total of 101 VOCs from April 16 to May 21,2019,were quantified using an online gas chromatography mass spectrometer/flame ionization detector(GCMS/FID).The results indicated that the observed concentration of total VOCs(TVOCs)was 30.4±17.0 ppbv,and it was dominated by alkanes(44.3%),followed by oxygenated VOCs(OVOCs)(17.4%),halocarbons(12.7%),aromatics(9.5%),alkenes(8.2%),acetylene(5.3%)and carbon disulfide(2.5%).The average mixing ratio of VOCs showed obvious diurnal variation(high at night,low during daytime).We conducted a source apportionment study based on 32 major VOCs using positive matrix factorization(PMF),and coal+biomass burning(25.2%),diesel exhaust(16.0%),gasoline exhaust+evaporation(17.4%),secondary+long-lived species(16.7%),biogenic sources(4.3%),industrial emissions(9.3%)and solvent use(11.2%)were identified as major sources of *** addition to local emissions,most of the atmospheric VOCs were derived from long-distance air masses(65.7%),and the average mixing ratio of VOCs in the northwest direction was 29.4 *** with the results of the potential source contribution function(PSCF)indicate that research should focus on the local emissions of combustion,transportation sources and solvents usage to control atmospheric ***,transmission of the northwest air mass is an important component that cannot be ignored during spring in Beijing.

关键词： VOCs Source apportionment Beijing Spring Northwest transport

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Z型电荷分离介导的0D/2D AgVO_(3)/TiO_(2)异质结用于增强光催化CO_(2)还原

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Science China Materials 2024年第6期67卷 1820-1829页

作者：王鋙葶蒋娟姚楠左淦丞朱文磊郭秀云鲜啟鸣 State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China Jiangsu Engineering Lab of Water and Soil Eco-Remediation School of EnvironmentNanjing Normal UniversityNanjing 210023China Key Laboratory of Chinese Cuisine Intangible Cultural Heritage Technology Inheritance School of Tourism and CuisineYangzhou UniversityYangzhou 225127China

合理利用Z型电荷调节机制是提高光催化CO_(2)还原效率的有效策略.在本工作中,通过将AgVO_(3)量子点(QDs)原位锚定在TiO_(2)纳米片(NSs)上,从而构建了0D/2D AgVO_(3)/TiO_(2)直接Z型异质结光催化剂.TiO_(2)NSs抑制了AgVO_(3)量子点自身... 详细信息

合理利用Z型电荷调节机制是提高光催化CO_(2)还原效率的有效策略.在本工作中,通过将AgVO_(3)量子点(QDs)原位锚定在TiO_(2)纳米片(NSs)上,从而构建了0D/2D AgVO_(3)/TiO_(2)直接Z型异质结光催化剂.TiO_(2)NSs抑制了AgVO_(3)量子点自身的团聚,从而优化了体系的形貌结构.AgVO_(3)QDs增强了复合材料的光吸收能力,从而提高了对太阳光的利用效率.同时,两种单体之间匹配的能带结构和合适的内部界面电场(即(-)AgVO_(3)/(+)TiO_(2))促进了直接Z型异质结的构建,从而显著促进了光生电子-空穴对的分离,并保持了体系中最高的氧化还原电位.优化后的AgVO_(3)/TiO_(2)复合材料在没有任何助催化剂的情况下,表现出具有竞争力的光催化CO_(2)还原效率(CO,47.61μmol h-1g-1),是原始TiO_(2)NSs的20.97倍.本工作提出了一种直接Z型异质结的合理设计方法,为高效光催化CO_(2)还原催化剂的开发提供了指导.

关键词： photocatalytic CO_(2)reduction direct Z-scheme het-erojunction internal interfacial electric field TiO2 nanosheets AgVO_(3)quantum dots

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Planning Water-Food-Energy Nexus System Towards Sustainable Development Under Uncertainty 6th

Planning Water-Food-Energy Nexus System Towards Sustainable ...

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6th Asia Conference on environment and Sustainable Development, ACESD 2021

作者： Zhang, Y.F. Li, Y.P. Huang, G.H. 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 7H9 Canada

ISBN: (纸本)9789811917035

In this study, a copula-based stochastic fractional programming (CSFP) method is developed for planning water-food-energy nexus (WFEN) system. CSFP method can deal with bi-objective optimization problems and address correlated uncertainties within nexus system. Then, a CSFP-WFEN model is proposed and applied to an arid region, where 16 scenarios with different joint probabilities associated with various water availabilities, land resources and available electricity are analysed. Major findings are: (i) water allocation for Uzbekistan should be primarily constrained for alleviating water shortage risk over time;(ii) scheme of agricultural production should consider ramping up cash crop and shrinking livestock farming for adapting limited resources and enhancing the marginal benefit;(iii) from 2021 to 2035, hydropower generation would increase by 10.3% and thermal power would decrease by 3.5%, which implies that electricity generation patterns should change towards renewable energy in the future;(iv) correlated uncertainties (corresponding to the joint probability risk) have a significant influence on marginal benefit and water allocation patterns, decision makers should adjust strategies towards sustainable development according to risk attitude and local resources conditions under uncertainty. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Planning

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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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Te-mediated electro-driven oxygen evolution reaction

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Nano Research Energy 2022年第3期1卷 52-65页

作者： Feng Gao Jiaqing He Haowei Wang Jiahui Lin Ruixin Chen Kai Yi Feng Huang Zhang Lin Mengye Wang State Key Laboratory of Optoelectronic Materials and Technologies School of MaterialsSun Yat-sen UniversityGuangzhou 510275China School of Environment and Energy Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters(Ministry of Education)South China University of TechnologyGuangzhou 51006China School of Metallurgy and Environment Central South UniversityChangsha 410083China

In the 21^(st)century,the rapid development of human society has made people’s demand for green energy more and more *** high-energy-density hydrogen energy obtained by fully splitting water is not only environmentally friendly,but also is expected to solve the problems caused by the intermittent nature of new ***,the slow kinetics and large overpotential of the oxygen evolution reaction(OER)limit its *** introduction of Te element is expected to bring new *** the least electronegativity among the chalcogens,the Te element has many special properties,such as multivalent states,strong covalentity,and high electrical conductivity,which make it a promising candidate in electrocatalytic *** this review,we introduce the peculiarities of Te element,summarize Te doping and the extraordinary performance of its compounds in OER,with emphasis on the scientific mechanism behind Te element promoting the OER kinetic ***,challenges and development prospects of the applications of Te element in OER are presented.

关键词： oxygen evolution reaction telluride electrocatalyst water splitting chalcogen

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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. © 2023, The Authors. All rights reserved.

关键词： Health risks

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An Integrated Bi-level Optimization Model for Planning Water-Food-Energy Nexus System Under Uncertainty 6th

An Integrated Bi-level Optimization Model for Planning Water...

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6th Asia Conference on environment and Sustainable Development, ACESD 2021

作者： Ma, Y. Li, Y.P. Huang, G.H. 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 7H9 Canada

ISBN: (纸本)9789811917035

In this study, a fuzzy bi-level programming (FBP) method is developed for planning water-food-energy (WFE) nexus system. FBP can tackle fuzzy uncertainty expressed as flexible variable and balance the conflict existed in different decision levels. Then, an FBP-WFE model is formulated for Amu Darya River Basin (ARB), in which two-level stakeholders are involved. The upper-level decision maker aims to maximize system benefit, and the lower-level decision maker aims to maximize food production. Three countries, fourteen states, fifteen water users and six planning periods (2021–2050) are also involved in the developed model. Major findings are (i) agricultural sector is the largest water user in ARB (accounting for 78.2%), implying that improving irrigation efficiency and reducing agricultural water allocation are crucial for alleviating water scarcity problem;(ii) there is competition for water resources between electricity generation and food production, with the increasing electricity demand level, the food production would decrease by 2.6‰. The obtained results can provide policy supports for decision makers to alleviate water shortage, ensure food security and energy supply security. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Decision making

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Machine learning and theoretical analysis release the non-linear relationship among ozone,secondary organic aerosol and volatile organic compounds

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Journal of environmental Sciences 2022年第4期34卷 75-84页

作者： Feng Wang Zhongcheng Zhang Gen Wang Zhenyu Wang Mei Li Weiqing Liang Jie Gao Wei Wang Da Chen Yinchang Feng Guoliang Shi State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control Tianjin Key Laboratory of Urban Transport Emission ResearchCollege of Environmental Science and EngineeringNankai UniversityTianjin 300350China CMA-NKU Cooperative Laboratory for Atmospheric Environment-Health Research(CLAER) College of Environmental Science and EngineeringNankai UniversityTianjin 300350China State Key Laboratory on Odor Pollution Control Tianjin Academy of Environmental SciencesTianjin 300191China Guangdong Provincial Engineering Research Center for On-line Source Apportionment System of Air Pollution Jinan University Institute of Mass Spectrometry and Atmospheric EnvironmentGuangzhou 510632China Guangdong-Hongkong-Macao Joint Laboratory of Collaborative Innovation for Environmental Quality Guangzhou 510632China Trusted AI System Laboratory College of Computer ScienceNankai UniversityTianjin 300350China Key Laboratory of Civil Aviation Thermal Hazards Prevention and Emergency Response Civil Aviation University of ChinaTianjin 300300China

Fine particulate matter(PM_(2.5))and ozone(O_(3))pollutions are prevalent air quality issues in *** organic compounds(VOCs)have significant impact on the formation of O_(3)and secondary organic aerosols(SOA)contributing PM_(2.5).Herein,we investigated 54 VOCs,O_(3)and SOA in Tianjin from June 2017 to May 2019 to explore the non-linear relationship among O_(3),SOA and *** monthly patterns of VOCs and SOA concentrations were characterized by peak values during October to March and reached a minimum from April to September,but the observed O_(3)was exactly the *** learning methods resolved the importance of individual VOCs on O_(3)and SOA that alkenes(mainly ethylene,propylene,and isoprene)have the highest importance to O_(3)formation;alkanes(C_(n),n≥6)and aromatics were the main source of SOA *** learning methods revealed and emphasized the importance of photochemical consumptions of VOCs to O_(3)and SOA *** formation potential(OFP)and secondary organic aerosol formation potential(SOAFP)calculated by consumed VOCs quantitatively indicated that more than 80%of the consumed VOCs were alkenes which dominated the O_(3)formation,and the importance of consumed aromatics and alkenes to SOAFP were 40.84%and 56.65%,***,isoprene contributed the most to OFP at 41.45%regardless of the season,while aromatics(58.27%)contributed the most to SOAFP in ***,our findings can provide scientific evidence on policymaking for VOCs controls on seasonal scales to achieve effective reduction in both SOA and O_(3).

关键词： VOCs Machine learning Photochemical consumption Ozone formation potential Secondary organic aerosol formation potential

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environmental benefits and farmers' adoption of winter cover crops in the North China Plain

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Pedosphere 2024年第1期34卷 159-169页

作者： Shufang GUO Yitao ZHANG Limei ZHAI Jian LIU Hongyuan WANG Hongbin LIU State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China Key Laboratory of Nonpoint Source Pollution ControlMinistry of Agriculture and Rural AffairsInstitute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing 100081China Institute of Agricultural Environment and Resources Yunnan Academy of Agricultural SciencesKunming 650205China Shandong Yucheng Agro-ecosystem National Observation Research Station Key Laboratory of Ecosystem Network Observation and ModelingInstitute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China The Norwegian Institute of Bioeconomy Research(NIBIO) Akershus 1431Norway

The introduction of cover crops into monoculture systems to improve soil health has been widely adopted worldwide. However, little is known about the environmental risks and application prospects of different cover crops in spring maize(Zea mays L.) monocultures proposed in the North China Plain. A pot experiment was conducted to evaluate the effects of different winter cover crops on subsequent maize yield, soil fertility, and environmental risks of nitrogen(N) loss, and a questionnaire survey was conducted to examine factors influencing farmers' willingness to adopt cover crops in the North China Plain. Based on the same fertilization regime during the maize growing period, four winter cover crop treatments were set up, including bare fallow, hairy vetch(Vicia villosa Roth.), February orchid(Orychophragmus violaceus), and winter oilseed rape(Brassica campestris L.). The results indicated that winter cover crops significantly increased subsequent maize yield and soil organic carbon, total N, and microbial biomass carbon and N compared with the bare fallow *** incorporation of cover crops led to a negligible increase in nitrous oxide(N_(2)O) emissions and had a very limited effect on ammonia(NH_(3)) *** incorporation of February orchid and winter oilseed rape decreased nitrate leaching compared with the hairy vetch treatment in the maize growing *** N losses via N_(2)O and NH_(3) emissions and N leaching accounted for 71%–84% of the N surplus. However, yield increase and environmental benefits were not the main positive factors for farmers to accept cover crops. Financial incentive was rated by 83.9% of farmers as an “extremely important” factor, followed by other costs, when considering winter cover cropping. These results indicate that the environmental benefits depend on the type of cover crop. Maintaining high levels of soil fertility and maize yield, providing sufficient subsidies, and encouraging large-area cultivation of cover crops

关键词： cover crop N leaching NH_(3)emission N_(2)O emission spring maize willingness to accept

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Quantitative Indicators of as and Cd Release from Various Soils Under Flooding Condition

SSRN

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SSRN 2024年

作者： Ge, Jingwen Wu, Song Wu, Haotian Lin, Jianyu Cai, Yijun Zhou, Dongmei Gu, Xueyuan State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing China Nanjing University China

Although the mobility of arsenic (As) and cadmium (Cd) in soils during the flooding-drainage process has been intensively studied, quantifying their dissolution among various soils still remains a challenge. After comprehensively monitoring multiple parameters related to As and Cd dissolution in 8 soils for a 60-day anaerobic incubation, the redundancy analysis (RDA) and structural equation model (SEM) were employed to identify the key factors and influencing pathways controlling the dynamic release of As and Cd. Results showed that pH alone explained 90.5% Cd dissolution, while the dissolved-Fe(II) and 5M-HCl extractable Fe(II) jointly only explained 50.6% As dissolution. After data normalization, the ratio of Fe(II) to 5M-HCl extracted total Fe (i.e. / ) significantly improved the correlation to R2= 0.824 (p © 2024, The Authors. All rights reserved.

关键词： Dissolution

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