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ACS ES&T Air 2024年第3期1卷 150-161页

作者： Deming Han Qingru Wu Shuxiao Wang Changlei Xie Jianbo Shi Wang Zheng Jiubin Chen Yi Tang Daiwei Ouyang Boyang Feng Minneng Wen Lei Duan Jiming Hao State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Tsinghua University 100084 Beijing China School of Environment Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences 310000 Hangzhou China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex 100084 Beijing China State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences 100085 Beijing China Institute of Surface-Earth System Science School of Earth System Science Tianjin University 300072 Tianjin China

Particle bound mercury (PBM) deposition on the Earth’s surface threatens biota and humans. The photoreduction of PBM competes with deposition and thereby modifies global mercury cycling; yet, its pathway and mechanism remain poorly understood. Herein, we reveal the photoreduction process of PBM by comprehensively using field observation, mercury stable isotope analysis, and controlled experiment. We found the Δ199Hg values in wet haze episodes (0.34‰ ± 0.30‰) were significantly higher than those in clean periods (0.14‰ ± 0.19‰), majorly attributed to the elevated aerosol water content (AWC), which shifts the aerosol phase from the solid state to the liquid state, promoting soluble HgCl2and HgBr2photoreduction reactions. The carboxyl functional groups of water-soluble organic carbon (WSOC) were further identified as the crucial compounds that induce PBM photoreduction, whose reaction rates were ∼2 times higher than those of phenol and ketone ligands and 3–6 times higher than those observed in other atmospheric aqueous phases. Considering the ubiquitously distributed carboxyl ligands and significant positive Δ199Hg signals in the atmospheric aqueous phases, the PBM photoreduction mediated by carboxyl ligands is highlighted to significantly influence global mercury transformations, regional depositions, and isotopic compositions of atmospheric mercury pools.

关键词： Aerosols Cations Ligands Mercury Redox reactions

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Mechanisms of Cr(Vi) Adsorption and Reduction on Hss-Fe(Iii) Coprecipitates: Synergistic/Antagonistic Effects Induced by Different Hss

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SSRN 2024年

作者： Wang, Hui Gong, Xueying Zhu, Jinqi Barnie, Samuel Yuan, Ying Xi, Beidou Tan, Wenbing Chen, Honghan Zhang, Jia State Key Laboratory of Environmental Criteria and Risk Assessment State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution Chinese Research Academy of Environmental Sciences Beijing100012 China Beijing Key Laboratory of Water Resources & Environmental Engineering China University of Geosciences Beijing100083 China Department of Water and Sanitation University of Cape Coast Cape Coast Ghana

To clarify the mechanisms of Cr(VI) attenuation in a subsurface environment enriched in natural organic matter and iron minerals, FA-Fe(III) coprecipitates (FFCs) were synthesized to simulate HSs-Fe(III) coprecipitates. The Cr(VI) adsorption and reduction induced by different types of HSs were compared with those on HA-Fe(III) coprecipitates (HFCs) investigated in an earlier study. The adsorption of Cr(VI) onto both FFCs and HFCs was attributed to the formation of inner- and outer-sphere complexes by Fe(III) and HSs. However, the association of HSs and Fe(III) sheltered certain FeOH adsorption sites and enhanced the electrostatic repulsion to Cr(VI), thus decreasing the adsorption capability. The reduction of Cr(VI) involved two parallel processes, namely inductive and intrinsic reduction, with the final effect depending on the decrease in the number of inherent reduction sites (e.g., phenol) and increase in the number of activated sites (e.g., hydroxyl). Compared to HA, the hydroxyl within FA was more easily activated by Fe(III) (hydr)oxides (even by the weakly inductive Fe(III) cations) because of FA’s smaller molecular size. Consistent synergistic effects were thus identified in both the Fh- and FA-like FFCs, but only in the Fh-like HFCs. This study can have important applications in the remediation of Cr-contaminate sites. © 2024, The Authors. All rights reserved.

关键词： Coprecipitation

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Evaluation of the Rainfall Characteristics Impact on the Resilience of Urban Drainage Systems

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SSRN 2024年

作者： Wang, Hao Lian, Mengyuan Chu, Haibo Chen, Bin Zhou, Jinjun Faculty of Architecture Civil and Transportation Engineering Beijing University of Technology Beijing100124 China State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal University 100875 China

The urbanization and climate change have intensified the challenges to urban drainage infrastructure. Researching the flood resilience of drainage systems, and understanding their resistance and recovery processes during disasters, holds significant scientific importance for resilient city studies. This research has proposed an integral-based method to calculate the UDS resilience. Firstly, we computed the system performance curve by the integral-based method and compared calculation results with the simplified rectangular method. Subsequently, we obtained the indicators to represent the resilience of the UDS process for comprehensive evaluations by nearly 70 years of historical measured rainfall data. Lastly, the Spearman correlation analysis was employed to assess the impact of rainfall characteristics on resilience. The results indicated that the resilience calculated by the integral-based method is more realistic compared with the simplified rectangular method. The resilience of the UDS is influenced by characteristics of the catchments. Rainfall, average rainfall intensity, and peak rainfall intensity have a greater impact on resilience. © 2024, The Authors. All rights reserved.

关键词： Floods

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Research on Economic Dispatch Problem Based on Accelerated Dynamic Adjustment Differential Evolution Algorithm 10

Research on Economic Dispatch Problem Based on Accelerated D...

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10th China International Conference on Electricity Distribution, CICED 2022

作者： Li, Anyi Li, Xiaojun Tian, Jiahui Wang, Xinrui Zhang, Rui Qi, Jintao Hebei Key Laboratory of Energy Internet Simulation Modeling and Control State Grid Hebei Electric Power Research Institute Shijiazhuang China Grid Planning and Research Center State Grid Hebei Economic Research Institute Shijiazhuang China State Grid Hebei Electric Power Research Institute Shijiazhuang China

ISBN: (纸本)9781665452687

In order to save energy, reduce carbon and realize sustainable development, the economic dispatch problem with valve-point effects is studied in this paper. Firstly, summarize the solving methods of economic dispatch problem in the previous literature, and put forward the problems of the current solving methods. Then, an accelerated dynamic adjustment differential evolution algorithm is proposed. By introducing chaotic initialization operation, a nonlinear dynamic adjustment strategy of control parameters is formulated, and an accelerated convergence strategy is proposed to comprehensively improve the performance of the algorithm. Finally, the proposed method is verified by numerical simulation, and compared with other methods in terms of result accuracy and robustness. © 2022 IEEE.

关键词： Numerical methods

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Repercussions of COVID-19 pandemic on solid waste generation and management strategies

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Frontiers of Environmental Science & Engineering 2021年第6期15卷 241-258页

作者： Yangyang Liang Qingbin Song Naiqi Wu Jinhui Li Yuan Zhong Wenlei Zeng Macao Institute of Systems Engineering Macao University of Science and TechnologyMacao 999078China Macao Environmental Research Institute Macao University of Science and TechnologyMacao 999078China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China

It has been over ten months since the beginning of the 2019 coronavirus disease(COVID-2019),and its impact on solid waste management,especially medical waste,is becoming *** study systematically reviews the potential influences of the COVID-19 pandemic on medical waste,personal protection equipment waste and municipal solid waste(MSW),and discusses the corresponding measures and policies of solid waste management in typical *** results show that the generation of medical waste from the pandemic increased significantly,with 18%‒425%*** is estimated that the daily output of COVID-19 medical waste increased from 200 t/d on Feb.22 to over 29000 t/d at the end of September 2020 throughout the *** use of personal protective equipment will continue to grow in the long-term,while the blockade and isolation measures greatly reduced the volume of commercial waste,especially for tourist cities,and part of this waste was transferred to household ***’attitudes and behavior toward food waste have changed due to the COVID-19 *** response to the pandemic,international organizations and several countries have issued new policies and guidelines and adjusted their management strategies for medical waste and MSW *** pandemic has brought specific challenges to the disposal capacity of medical waste *** has also brought about the stagnation of policies related to the reduction of plastic products and waste *** study will provide some useful information for managers and governmental officials on effective solid waste management during and after the COVID-19 pandemic.

关键词： COVID-19 Medical waste Personal protective equipment Municipal solid waste Waste management

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Contrasting trends of PM2.5 and surface-ozone concentrations in China from 2013 to 2017

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National Science Review 2020年第8期7卷 1331-1339页

作者： Yonghong Wang Wenkang Gao Shuai Wang Tao Song Zhengyu Gong Dongsheng Ji Lili Wang Zirui Liu Guiqian Tang Yanfeng Huo Shili Tian Jiayun Li Mingge Li Yuan Yang Biwu Chu Tuukka Pet?j? Veli-Matti Kerminen Hong He Jiming Hao Markku Kulmala Yuesi Wang Yuanhang Zhang State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC) Institute of Atmospheric Physics Chinese Academy of Sciences Institute for Atmospheric and Earth System Research University of Helsinki China National Environmental Monitoring Center (CNEMC) Anhui Institute of Meteorological Sciences State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Center for Excellence in Regional Atmospheric Environment Institute of Urban Environment Chinese Academy of Sciences State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and Engineering Peking University

Although much attention has been paid to investigating and controlling air pollution in China, the trends of air-pollutant concentrations on a national scale have remained unclear. Here, we quantitatively investigated the variation of air pollutants in China using long-term comprehensive data sets from 2013 to 2017, during which Chinese government made major efforts to reduce anthropogenic emission in polluted regions. Our results show a significant decreasing trend in the PM2.5concentration in heavily polluted regions of eastern China, with an annual decrease of ～7% compared with measurements in 2013. The measured decreased concentrations of SO2, NO2and CO（a proxy for anthropogenic volatile organic compounds） could explain a large fraction of the decreased PM2.5concentrations in different regions. As a consequence, the heavily polluted days decreased significantly in corresponding regions. Concentrations of organic aerosol,nitrate, sulfate, ammonium and chloride measured in urban Beijing revealed a remarkable reduction from 2013 to 2017, connecting the decreases in aerosol precursors with corresponding chemical components closely. However, surface-ozone concentrations showed increasing trends in most urban stations from 2013 to 2017, which indicates stronger photochemical pollution. The boundary-layer height in capital cities of eastern China showed no significant trends over the Beijing–Tianjin–Hebei, Yangtze River Delta and Pearl River Delta regions from 2013 to 2017, which confirmed the reduction in anthropogenic emissions. Our results demonstrated that the Chinese government was successful in the reduction of particulate matter in urban areas from 2013 to 2017, although the ozone concentration has increased significantly, suggesting a more complex mechanism of improving Chinese air quality in the future.

关键词： air pollution clean-air action particulate matter surface ozone China chemical composition

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High-density/efficient surface active sites on modified separators to boost Li-S batteries via atomic Co^(3+)-Se termination

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Nano Research 2022年第8期15卷 7199-7208页

作者： Shujie Liu Xiaofei Liu Manfang Chen Dong Wang Xin Ge Wei Zhang Xiyang Wang Chunhui Wang Tingting Qin Haozhe Qin Liang Qiao Dan Zhang Xing Ou Weitao Zheng Key Laboratory of Automobile Materials of MOE School of Materials Science and Engineeringand Electron Microscopy Centerand International Center of Future ScienceJilin UniversityChangchun 130013China Key Laboratory of Materials Design and Quantum Simulation College of ScienceChangchun UniversityChangchun 130022China National Base for International Science&Technology Cooperation School of ChemistryXiangtan UniversityXiangtan 411105China State Key Laboratory of Chem/Bio-Sensing and Chemometrics Advanced Catalytic Engineering Research Center of the Ministry of EducationCollege of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China Department of Mechanical and Mechatronics Engineering University of WaterlooWaterlooN2L 3G1Canada School of Metallurgy and Environment Central South UniversityChangsha 410083China

Various and critical electrocatalytic processes are involved during the redox reactions in the Li-S batteries,which extremely depend on the surface structure and chemical ***,single-atom concept unlocks a route to maximize the use of surface-active atoms,however,further increasing the density of active site is still strictly limited by the inherent structure that single-atoms are only highly-dispersed on ***,we provide a viewpoint that an elaborate facet design with singlecrystalline structure engineering can harvest high-density surface active sites,which can significantly boost the electrocatalyst performance for excellent Li-S ***,the single-crystal CoSe_(2)(scCS)exhibits three-types of terminated(011)facet,efficiently obtaining the surface with a high-rich Co^(3+)–Se bond termination,in contrast with lots of surface grain boundaries and dangling bonds in polycrystalline CoSe_(2).Surprisingly,the surface active sites concentration can reach more than 69%.As anticipated,it can provide high-density and high-efficient active sites,enormously suppressing the shuttle effect and improving the reaction kinetics via accelerating the conversion and deposition of polysulfides and *** surface lattice strategy with element terminated mode is a promising approach for designing electrocatalyst effect-based energy system,not merely for Li-S batteries.

关键词： high-density surface active sites Co^(3+)-Se covalent bond atomic element terminated Li-S batteries single-crystalline strategy

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Efficient Inactivation of Uv Resistant Bacteria (Urb) by Combined Uv and Chlorine Disinfection

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SSRN 2024年

作者： Cao, Ke-Fan Chen, Zhuo Wei, En-Jing Huang, Bang-Hao Gao, Yu-Jia Wu, Yin-Hu Hu, Hong-Ying Environmental Simulation and Pollution Control State Key Joint Laboratory Key Laboratory of Microorganism Application and Risk Control of the Ministry of Ecology and Environment School of Environment Tsinghua University Beijing100084 China Beijing Laboratory for Environmental Frontier Technologies Beijing100084 China Beijing Key Lab for Source Control Technology of Water Pollution College of Environmental Science and Engineering Beijing Forestry University Beijing100083 China Tsinghua Jiangsu Suzhou215163 China

Ultraviolet (UV) is widely used for wastewater and reclaimed water disinfection due to its high efficiency. However, some bacteria exhibit strong resistance to UV disinfection (referred to as UV resistant bacteria, or URB), which can survive after disinfection and pose various risks. In this study, two bacterial strains with strong UV resistance (Deinococcus soli and Sphingomonas panni) were isolated from reclaimed water. Neither single UV disinfection nor single chlorine disinfection can effectively inactivate these URB strains. To effectively control URB, the combined disinfection of UV and chlorine was investigated, and the results showed a significant improvement in inactivation efficiency with synergistic effects. Further analysis using total antioxidant capacity tests, qPCR detection, and SYTO9/PI staining techniques revealed that the main mechanism behind the synergistic effects was the enhanced damage to intracellular content and DNA. Finally, through cost analysis and disinfection tests with actual reclaimed water, the performance of the combined disinfection method was comprehensively evaluated. The results demonstrate combined disinfection has lower costs, higher inactivation rates, and less selectivity. This study can provide a reliable method for controlling the risks caused by URB in water. © 2024, The Authors. All rights reserved.

关键词： Cost benefit analysis

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Driver's Reaction Time Model for Braking Safety of Electric Vehicle Based on Fuzzy Logic

Driver's Reaction Time Model for Braking Safety of Electric ...

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2021 China Automation Congress, CAC 2021

作者： Zhang, Qi Xing, Guojing Fu, Xiaoling School of Control Science and Engineering Shandong University Jinan China State Key Laboratory of Automotive Simulation and Control Jilin University Changchun China Department of Physics Changji College Changji China

ISBN: (纸本)9781665426473

Regenerative braking is an effective way to improve the utilization of battery energy of electric vehicles (EVs), but the strength of regenerative braking is relatively weak compared with the mechanical braking, thus, the braking strategy must firstly ensure the braking safety distance, in other words, EV must stop completely within a certain braking distance at a certain speed. The effect of road friction, braking force intensity, and the driver's reaction time on the safe braking distance should be conducted simultaneously. In this paper, a driver's reaction time model based on fuzzy logic is proposed, which specifically analyzes the impact of different driving years, ages, and fatigue levels on the driver's reaction time. The results show that the driver's reaction time have a great effect on the braking distance, which is useful for the formulation of a regenerative braking strategy of EVs and autonomous driving vehicles. © 2021 IEEE

关键词： Fuzzy logic

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Chinese Academy of Engineering released Global Engineering Fronts

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Frontiers of Environmental Science & Engineering 2020年第4期14卷 1-2页

作者： Xu Wang Jiao Zhang Xi Lu Xia Huang State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China

The Chinese Academy of Engineering(CAE),in conjunction with Clarivate Analytics and the Higher Education Press,released the report of Global Engineering Fronts on December 10th,*** report contains 93 global engineering research fronts and 94 global engineering development fronts on nine core engineering *** fronts were generated from both data mining and expert judgement so as to focus on the representative key points to present and guide the development of engineering science and technology.

关键词： technology. Global mining

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