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Assessing impact of intermittent window opening strategies on pathogen-laden droplet dispersion in a coach bus

Building Simulation 2024年第7期17卷 1183-1200页

作者： Qiqi Luo Xingdong Deng Jian Hang Cuiyun Ou Zhiwen Luo Xiaodan Fan Xia Yang Yifei Zhang Zhongli Gu Xuelin Zhang School of Atmospheric Sciences Sun Yat-sen Universityand Southern Marine Science and Engineering Guangdong LaboratoryZhuhai 519082China Key Laboratory of Urban Meteorology China Meteorological AdministrationBeijing 100089China China Meteorological Administration Xiong'an Atmospheric Boundary Layer Key Laboratory Xiong'anChina Guangzhou Urban Planning&Design Survey Research Institute Guangzhou 510060China Guangzhou Collaborative Innovation Center of Natural Resources Planning and Marine Technology Guangzhou 510060China Guangdong Enterprise Key Laboratory for Urban Sensing Monitoring and Early WarningGuangzhou 510060China Welsh Schoolof Architecture Cardiff UniversityUK Guangdong Province Engineering Laboratory for Air Pollution Control South China Institute of Environmental Sciencesthe Ministry of Ecology and Environment of ChinaNo.7 West Street YuancunGuangzhou 510655China Guangdong Fans-tech Agro Co. LtdGuangdong ProvinceChina

Opening windows in coach buses is a practical approach to improving natural ventilation and mitigating infection risk(IR).Due to human behavior and weather conditions,the intermittent window opening strategy(IWOS)is a more common practice than keeping windows constantly *** its prevalence,there are no studies exploring IWOS specifically in *** employed indoor-outdoor coupled CFD simulations to assess the effects of various IWOS on pathogen-laden droplet(PLD)dispersion and IR in a coach bus that occurred a COVID-19 outbreak in Hunan,*** reveal that after ventilating through two skylights for 600–1800 s,opening front and rear windows(FW+RW)or FW with a wind catcher(FW+WCH)for just 40 s can reduce PLD concentration(Cave)to 5%of its initial level and the intake fraction of the infector’s neighbor(IFn)drops by 95%.Upon closing FW+RW or FW+WCH,Cave and IFn take over 580 s to return to the pre-opening ***,intermittent FW opening halves Cave and IFn within 7 min,but leads to rapid increases upon window ***,opening FW+RW and FW+WCH intermittently have pronounced impacts on indoor PLD concentration and are applicable approaches to control respiratory disease transmission in *** to the inhaled viral dose,it is recommended to open windows when driving time is over 12 minutes to reduce infection *** scenarios like epidemiological surveys and risk assessments,where assessing passenger infection risk is vital,some behaviors of opening windows cannot be overlooked and necessitate extra attention.

关键词： infection risk computational fluid dynamics air change rate per hour natural ventilation wind catcher tracer gas dispersion

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Determining the differences in O3-NOx-VOCs sensitivity between sauna and roast days

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Journal of Environmental Sciences (China) 2025年 157卷 605-614页

作者： Liu, Yuting Wang, Yinghong Liu, Yusi Cheng, Mengtian Liu, Baoxian Song, Tao Hu, Bo Yao, Dan Yu, Miao Shi, Yu Tang, Guiqian Wang, Yuesi State Key Laboratory of Atmospheric Environment and Extreme Meteorology Institute of Atmospheric Physics Chinese Academy of Sciences Beijing100049 China State Key Laboratory of Severe Weather & Key Laboratory for Atmospheric Chemistry of China Meteorology Administration Chinese Academy of Meteorological Sciences Beijing100081 China Beijing Key Laboratory of Airborne Particulate Matter Monitoring Technology Beijing Municipal Ecological Environmental Monitoring Center Beijing100048 China Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control Ministry of Education Henan Key Laboratory for Environmental Pollution Control School of Environment Henan Normal University Xinxiang453007 China University of Chinese Academy of Sciences Beijing100049 China

Temperature is a key meteorological factor that affects tropospheric ozone (O3), with both humid-heat (sauna days) and dry-heat (roast days) conditions leading to O3 exceedances. However, the mechanisms influencing O3 formation and degradation under these two weather conditions remain unclear. Therefore, experiments were conducted in Beijing from 2019 to 2021 to observe O3, its precursors, and related meteorological elements. A total of 18 days with O3 exceedances were selected, including 10 sauna days and 8 roast days. The results of this study revealed that on roast days, the sensible heat flux was 143.5 W/m2 greater and the wind speed gradient was 0.018 s-1 greater than those on sauna days, indicating more intense thermal and dynamic turbulence. The strong turbulence enhanced the vertical cycle of nitrogen dioxide (NO2) and O3, resulting in a 58.2 μg/(m2·h) increase in NO2 upward transport rate and a 1,034.4 μg/(m2·h) increase in O3 downward transport rate on roast days than sauna days. Subsequently, a box model analysis was used to examine O3 formation under the two types of weather conditions, revealing that the NO2-O3 vertical cycling speed dominated the O3 sensitivity. The O3 sensitivity was synergistically controlled by nitrogen oxides (NOx) and volatile organic compounds on sauna days, while it tended to be NOx-limited on roast days. The aim of this study was to provide a scientific theoretical basis for the control of O3 under different types of high temperature weather conditions. © 2024

关键词： Nitrogen oxides

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Enhanced removal of I^- on hierarchically structured layered double hydroxides by in suit growth of Cu/Cu2O

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Journal of Environmental Sciences 2020年第2期32卷 338-348页

作者： Jiuyu Chen Junyi Wang Qianhong Gao Xiaomei Zhang Ying Liu Peng Wang Yan Jiao Zongxiang Zhang Yi Yang Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse School of Environmental and Biological EngineeringNanjing University of Science and TechnologyNanjing 210094China Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control(AEMPC)Nanjing University of Information Science&TechnologyNanjing 210044China Jiangsu Environmental Protection Key Laboratory of Monitoring for Organic Pollutants in Soil Taizhou Environmental Monitoring CenterTaizhou 225300China

To further improve the removal ability of layered double hydroxide(LDH) for iodide(I^-) anions from wastewater, we prepared hierarchically porous Cu5Mg10Al5-LDH and used as a matrix for in suit growth of Cu/Cu2O on its surface, forming Cu/Cu2O-LDH, which was characterized and applied as an *** displayed high I^-saturation uptake capability(137.8 mg/g) of Cu/Cu2O-LDH compared with Cu5Mg10Al5-LDH(26.4 mg/g) even thermal activated LDH(76.1 mg/g).Thermodynamic analysis showed that the reaction between I^-anions and Cu/Cu2O-LDH is a spontaneous and *** kinetics analysis exhibited that adsorption equilibrium can be reached after 265 ***, the adsorbent showed satisfactory selectivity in the presence of competitive anions(e.g., SO4^2-), and could achieve good adsorption performance in a wide pH range of 3–8.A cooperative adsorption mechanism was proposed on the basis of the following two aspects:(1) ion exchange between iodide and interlayer anions;(2) the adsorption performance of Cu, Cu(Ⅱ) and Cu2O for I^-.Meanwhile, the difference between the adsorption mechanism of Cu/Cu2O-LDH, Cu5Mg10Al5-LDH and Cu5Mg10Al5-CLDH adsorbents was also elaborated and verified.

关键词： Layered double hydroxide Cu/Cu2O Iodide adsorption Hierarchical structure In suit growth

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Naringin ameliorates H_(2)O_(2)-induced oxidative damage in cells and prolongs the lifespan of female Drosophila melanogaster via the insulin signaling pathway

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Food Science and Human Wellness 2024年第3期13卷 1231-1245页

作者： Xiaomei Du Kexin Wang Xiaoyan Sang Xiangxing Meng Jiao Xie Tianxin Wang Xiaozhi Liu Qun Huang Nan Zhang Hao Wang State Key Laboratory of Food Nutrition and Safety Tianjin University of Science and TechnologyTianjin 300457China The key Laboratory of Environmental Pollution Monitoring and Disease Control Ministry of EducationGuizhou Medical UniversityGuizhou 550025China Department of neurosurgery the Fifth Central Hospital of TianjinTianjin 300450China Tianjin Key Laboratory of Epigenetics for Organ Department in Preterm Infants the Fifth Central Hospital of TianjinTianjin 300450China

Naringin exists in a wide range of Chinese herbal medicine and has proven to possess several pharmacological *** this study,PC12,HepG2 cells,and female Drosophila melanogaster were used to investigate the antioxidative and anti-aging effects of naringin and explore the underlying *** results showed that naringin inhibited H_(2)O_(2)-induced decline in cell viability and decreased,the content of reactive oxygen species in ***,naringin prolonged the lifespan of flies,enhanced the abilities of climbing and the resistance to stress,improved the activities of antioxidant enzymes,and decreased malondialdehyde *** also improved intestinal barrier dysfunction and reduced abnormal proliferation of intestinal stem ***,naringin down-regulated the mRNA expressions of inr,chico,pi 3k,and akt-1,and up-regulated the mRNA expressions of dilp2,dilp3,dilp5,and foxo,thereby activating autophagy-related genes and increasing the number of ***,the mutant stocks assays and computer molecular simulation results further indicated that naringin delayed aging by inhibiting the insulin signaling(IIS)pathway and activating the autophagy pathway,which was consistent with the result of network pharmacological predictions.

关键词： Drosophila melanogaster Insulin signaling(IIS)pathway Naringin PC12 cell HepG2 cell

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How do inundation provoke the release of phosphorus in soil-originated sediment due to nitrogen reduction after reclaiming lake from polder

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Journal of Environmental Sciences 2022年第8期34卷 147-157页

作者： Hezhong Yuan Bingchan Jia JuanWu Haixiang Wang Jianghua Yu Yiwei Cai Enfeng Liu Qiang Li Qingfei Zeng Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control and Collaborative Innovation Center of Atmospheric Environment and Equipment Technology(CICAEET) School of Environmental Science and EngineeringNanjing University of Information Science and TechnologyNanjing 210044China State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China Gaochun District Water Authority Bureau Nanjing 211300China College of Geography and Environment Shandong Normal UniversityJi’nan 250359China Department of Soil Science University of Wisconsin-MadisonMadison 53706USA

Different N and P fractions inmicrocosm incubation experiment was measured using highresolution in-situ Peeper and DGT techniques combining with sequential extraction *** results showed the synchronous desorption and release of PO_(4)^(3-),S^(2-)and Fe^(2+)from the solid soil-originated *** trend indicated that the significant reduction of Fe-P and SO_(4)^(2-) occurred in the pore water during the *** concentrations of PO_(4)^(3-) in the overlying water and pore water increased to more than 0.1 and 0.2 mg/L at the beginning of the incubation *** NO_(3)^(-) concentrations from more than 1.5 mg/L to less than 0.5 mg/L combining with increasing NH^(4+) concentrations from less than 1mg/L tomore than 5 mg/L suggested the remarkable NO_(3)-reduction via dissimilatory nitrate reduction to ammonia(DNRA)pathway over *** NH^(4+) concentrations in the pore water aggravated the release of Fe^(2+) through reduction of Fe(Ⅲ)-P as electric acceptors under anaerobic *** process further stimulated the remarkable releasing of labile PO_(4)^(3-) from the solid phase to the solution and potential diffusion into overlying ***,high S^(2-) concentration at deeper layer indicated the reduction and releasing of S^(2-)from oxidation states,which can stimulated the NO_(3)^(-)reduction and the accumulation of NH^(4+)in the pore *** process can also provoke the reduction of Fe-P as electric acceptors following the release of labile PO_(4)^(3-)into pore ***,inundation potentially facilitate the desorption of labile P and attention should be paid during the reclaiming lake from polder.

关键词： Reclaiming lake from polder P release NO3-reduction Fe2+ Microcosmic incubation Experiment Peeper and DGT Peeper and DGT

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Accumulation Kinetics of Polystyrene Nano- and Microplastics in the Waterflea Daphnia Magnaand Trophic Transfer to the Mysid Limnomysis Benedeni

SSRN

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SSRN 2024年

作者： Yu, Qi Nederstigt, Tom A.P. Wang, Zhuang Wu, Juan Bosker, Thijs Peijnenburg, Willie J.G.M. Vijver, Martina G. State Environmental Protection Key Laboratory of Water Environmental Simulation and Pollution Control South China Institute of Environmental Science Ministry of Ecology and Environment Guangzhou510535 China Leiden University Leiden2300 RA Netherlands School of Environmental Science and Engineering Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Nanjing University of Information Science and Technology Nanjing210044 China Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province Zhejiang University of Technology Hangzhou310014 China Bilthoven3720 BA Netherlands

Trophic transfer of nano- and microplastics (NMPs) within food webs is poorly understood. Here we investigated the accumulation of differently sized polystyrene particles (PSPs) in Daphnia magna and their subsequent transfer to Limnomysis benedeni, explicitly accounting for the fate of the PSPs in the aquatic system as a function of particle size (26, 500 and 4800 nm). L. benedeni were fed D. magna exposed to 8 mg/L PSPs for 16 h and were subsequently depurated for 48 h in the absence of food. On the basis of the mass of particles accumulated in the organisms, the internal concentration of 4800 nm PSPs was found to be 4 -10 times higher than that of 26 and 500 nm PSPs in D. magna. Uptake rate constants in daphnids for 26 nm (1.7 ± 0.4 L/g·h) and 4800 nm (1.7 ± 0.4 L/g·h) were significantly (p © 2024, The Authors. All rights reserved.

关键词： Rate constants

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New Insights into the Inhibition Performance and Mechanisms of Sodium Dodecyl Benzene Sulfonate (Sdbs) on Nitrogen Removal in Activated Sludge-Biofilm System

SSRN

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SSRN 2024年

作者： Qu, Yanhui Huang, Xiao Dong, Wenyi Zhang, Shuai Zhou, Guorun Zheng, Zhihao Teng, Xindong Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control School of Environmental Science and Engineering Nanjing University of Information Science and Technology Nanjing210044 China Shenzhen518055 China

To investigate the effect of sodium dodecyl benzene sulfonate (SDBS), a common constituent in electroplating wastewater, on nitrogen (N) removal performance and biological mechanism, a gradient of SDBS concentrations was introduced into a set of sequencing batch biofilm reactors (SBBRs). Analytical outcomes indicated a negative correlation between SDBS levels, ranging from 0 to 5 mg L-1, and the removal efficiencies of key pollutants: chemical oxygen demand (COD), ammonia nitrogen (NH4+-N), and nitrate nitrogen (NO3-N), which exhibited the maximum average declines of 11.83%, 12.15%, and 8.11%, respectively. Despite shifts in operational conditions, Proteobacteria, Patescibacteria, and Actinobacteria remained dominant within the microbial community. Moreover, the presence of SDBS led to a suppression of key genes and enzymes in the N and Tricarboxylic acid (TCA) cycles, thus impinging upon the generation of electron donors. This study provides a nuanced understanding of the effect of SDBS on the N removal efficacy of activated sludge-biofilm systems, as well as crucial insights into the adaptive responses of microbial communities to SDBS exposure. © 2024, The Authors. All rights reserved.

关键词： Microorganisms

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Study on Adsorption of Heavy Metals Cu and Zn by Microplastics Under Different Aged Factors

Study on Adsorption of Heavy Metals Cu and Zn by Microplasti...

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作者： Wenxi Teng Xiang Zhang Yalin Yang Jinfeng Zeng Junfeng Lian Xinxin Qin Ganzhou Key Laboratory of Basin Pollution Simulation and Control Jiangxi University of Science and Technology Hydrology and Water Resources Monitoring Center for Ganjiang Upstream Watershed Jiangxi Provincial Key Laboratory of Environmental Geotechnology and Engineering Disaster Control Jiangxi University of Science and Technology

Microplastics are widely distributed in a variety of environments,absorbing heavy metals in the environment while aging due to various environmental *** this paper,the effects of different aging factors（pH,DOM,and HO） on the adsorption capacity of heavy metals Cu and Zn on polyethylene microplastics（PE-MPs） were investigated,and the changes in physical and chemical properties of PE microplastics were *** results demonstrate that HO aging bears the greatest effect on the adsorption effect of PE microplastics,dissolved organic matter（DOM） aging has the least effect on the adsorption effect of PE microplastics,and the adsorption effect of microplastics aged with pH=9 is stronger than that aged with pH=4;the adsorption kinetics model of microplastics fitted to the pseudo-second-order kinetic model,and the thermodynamic model fitted to Langmuir model;aging mainly changed the surface structure of microplastics,increased the Zeta potential of microplastics,introduced more oxygen-containing functional groups,and finally affected the ability of microplastics to adsorb heavy *** research provides data reference for understanding the influence of different aging on the adsorption capacity of heavy metals in microplastics.

关键词： Study on Adsorption of Heavy Metals Cu and Zn by Microplastics Under Different Aged Factors

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中国实现碳中和路径下气溶胶减少造成的气候影响

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Science Bulletin 2023年第9期68卷 902-905,M0004页

作者：杨洋曾靓莹王海龙王品雅廖宏 Joint International Research Laboratory of Climate and Environment Change Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution ControlJiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment TechnologySchool of Environmental Science and EngineeringNanjing University of Information Science and TechnologyNanjing 210044China College of Meteorology and Oceanography National University of Defense TechnologyChangsha 410073China Atmospheric Sciences and Global Change Division Pacific Northwest National LaboratoryRichland WA 99352USA

中国提出2030年碳达峰与2060年碳中和目标.在达到碳中和的路径下,得益于清洁空气政策气溶胶排放都将显著降低,这可能会对未来气候产生重要影响.本文利用气候模型结合中国本地化的未来排放情景,发现在达到2060年碳中和的过程中气溶胶减... 详细信息

中国提出2030年碳达峰与2060年碳中和目标.在达到碳中和的路径下,得益于清洁空气政策气溶胶排放都将显著降低,这可能会对未来气候产生重要影响.本文利用气候模型结合中国本地化的未来排放情景,发现在达到2060年碳中和的过程中气溶胶减少将在东亚造成0.63 Wm^(-2)的有效辐射强迫以及0.2K的地表增温.最大增温出现在中国东部,为0.5K.同时,华南地区降水将增加(>0.3 mm d^(-1)).尽管碳中和背景下温室气体的减少将有利于缓解气候变化,但是未来清洁空气行动致使气溶胶排放的减少将部分抵消二氧化碳减排带来的气候制冷效应.该研究进一步发现虽然黑碳气溶胶只占中国气溶胶的很少一部分,但降低黑碳排放可能同时有益于空气质量改善并缓解气候变化,达到减污降碳协同增效.

关键词：碳中和二氧化碳减排未来气候气溶胶气候模型温室气体气候变化协同增效

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MOF-derived Co-MOF,O-doped carbon as trifunctional electrocatalysts to enable highly efficient Zn-air batteries and water-splitting

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Journal of Energy Chemistry 2021年第5期30卷 290-298页

作者： Xinde Duan Na Pan Can Sun Kexin Zhang Xukun Zhu Mingdao Zhang Li Song Hegen Zheng School of Environmental Science and Engineering Nanjing University of Information Science&TechnologyJiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution ControlCollaborative Innovation Center of Atmospheric Environment and Equipment TechnologyNanjing 210044JiangsuChina State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical EngineeringCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210023JiangsuChina

Development of high-efficiency non-noble electrocatalysts for oxygen reduction reaction(ORR),oxygen evolution reaction(OER)and hydrogen evolution reaction(HER)is urgently needed for high-performance Zn-air batteries and overall water ***,a facile strategy to synthesize novel Co-MOF,O-doped carbon(Co-MOF-T)based on Zn,Co-doped glucosamine and ZIF-8 by pyrolysis at temperature T was *** prepared Co-MOF-800 showed a superior oxygen reduction reaction(ORR)activity comparable to that of commercial Pt/C *** addition,this catalyst shows great potential in the overall water splitting due to the excellent oxygen evolution reaction(OER)and hydrogen evolution reaction(HER)*** on the trifunctional activity,the primary Zn-air batteries using a Co-MOF-800 air electrode achieved a high open-circuit voltage of 1.38 V,a specific capacity of 671.6 mAh g^(-1) Zn,and a prominent peak power density of 144 mW cm^(-2).Also,the rechargeable Zn-air batteries based on CoMOF-800 air electrode could be smoothly run for 510 cycles with a low voltage gap of 0.58 ***,the trifunctional Co-MOF-800 catalyst was applied to boost the electrochemical water splitting,demonstrating its promising potential as a green energy material for practical applications.

关键词： Metal-organic frameworks Carbon catalysts Trifunctional electrocatalyst Metal-air batteries Water splitting

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