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SSRN 2022年

作者： Xu, Leilei Wen, Xueying Xu, Chunying Bian, Yufang Chen, Mindong Cheng, Ge Wu, Cai-E Qiu, Jian Chen, Bin Hu, Xun Collaborative Innovation Centre of the Atmospheric Environment and Equipment Technology School of Environmental Science and Engineering Nanjing University of Information Science & Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Nanjing210044 China College of Light Industry and Food Engineering Nanjing Forestry University Nanjing210037 China Jiangsu ShuangLiang Environmental Technology Co. Ltd. Jiangyin214400 China School of Material Science and Engineering University of Jinan Jinan250022 China

In this work, a series of rare earths (Pr, Sm, Ce, La) doped Ni/KCC-1 catalysts were prepared and used for CO2 methanation. It was found that doping the rare earths could greatly improve the low-temperature catalytic activities and promoting effect of Sm was more prominent than other doped counterparts (Pr, Ce, La). The effect of the Sm loading amount on the catalytic activity were further evaluated. The kinetic studies revealed that the rare earth doped catalysts performed lower apparent activation energies than the pristine Ni/KCC-1 catalyst. In order to reveal the behind reasons, these catalysts were comprehensively characterized via XRD, XPS, TEM, SEM-EDS, CO2-TPD, H2-TPR, etc. It was found that the presence of the rare earth dopants could evidently intensify the metal-support interaction, promote the dispersion of the metallic Ni active sites, generate abundant surface oxygen vacancies, and enhance the amount of the medium basic sites. Besides, the online TPSR and in-situ DRIFTS indicated that the addition of the rare earth oxides could affect the type of the reaction intermediates and the potential pathway of the CO2 methanation. In general, these rare earths doped catalysts were deemed to be the superb catalyst candidates for the low-temperature CO2 methanation. © 2022, The Authors. All rights reserved.

关键词： Carbon dioxide

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Deciphering the Dominant Components and Functions of Microbial Communities at the Combined Application of Fermentation Tower Composting and Rotting Strip-Stack Composting to Chicken Manure

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SSRN 2023年

作者： Luo, Qu Wang, Hu Lu, Xiaoqing Wang, Can Chen, Ruiying Cheng, Jianbo He, Tengbing Fu, Tianling College of Resource and Environmental Engineering Guizhou University Guiyang550025 China Guizhou Engineering Laboratory of Mountain Livestock and Poultry Farming Pollution Control and Resource Technology Institute of New Rural Development Guizhou University Guiyang550025 China Guizhou Chuyang Ecological Environmental Protection Technology Co. Ltd. Guizhou550003 China Lijiang Agricultural Environmental Protection Monitoring Station Yunnan Lijiang674100 China

Chicken manure is the most important source of organic fertilizer in China. However, there is limited information on the microbial degradation of organic matter in fermentation tower (FT) and subsequent rotting strip-stack compost (STS). This study investigates the major components and metabolic functions of the microbial community of chicken manure in the combined application of FT and STS. The result showed that Bacillus_aidingensis , Dietzia_cinnamea, Corynebacterium_urealyticum and Mesorhizobium_sp._UASWS1009 were the dominant species in fermenter discharge (FD). The predominant strains in the surface samples (SS) of the rotting strip stacks were Nocardiopsis_salina and Ruania_albidiflava. Desmospora_sp._8437 and Nesterenkonia_sp._NP1 in Strip Inner Sample (SI). Oceanobacillus_massiliensis and Virgibacillus_alimentarius was the dominant species in FT-STS. Functional microorganisms in FT-STS are different in degrading organic matter. Carbohydrate and amino acid metabolism were the main functions of the FT-STS bacterial community, while the gene abundance of carbohydrate-active enzymes was applied to further validate the dominant function of the microbial community. © 2023, The Authors. All rights reserved.

关键词： Fermentation

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Label-Free Photocatalytic Electrochemical Biosensor for Detection of Uranyl Ions in Water

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SSRN 2023年

作者： Xiang, Mei Chen, Qiulian Zhu, Guonian Chen, Zhaoxia Li, Hailiang Hou, Xiaolin Wu, Jialun Xu, Shuxia College of Earth Sciences Chengdu University of Technology Sichuan Chengdu610059 China College of Ecology and Environment Chengdu University of Technology Sichuan Chengdu610059 China College of Material and Chemistry & Chemical Engineering Chengdu University of Technology Sichuan Chengdu610059 China Chengdu Ecological and Environmental Monitoring Center of Sichuan Province Sichuan Chengdu610066 China State Environmental Protection Key Laboratory of Synergetic Control and Joint Remediation for Soil & Water Pollution Chengdu University of Technology Sichuan Chengdu610059 China

A label-free and DNAzyme-based photocatalytic electrochemical biosensor was developed for the detection of uranyl ions (UO22+) in water. In this sensing platform, the SYBR Green (SG) molecules that were embedded in double-stranded DNA (dsDNA), and the dsDNA was cleaved via singlet oxygen (1O2) during photosensitization, causing a significantly declined in the impedance signal of [Fe (CN)6]3-/4-. In the presence of UO22+, the substrate strand was cleaved by the target UO22+, releasing the SG molecule from the dsDNA, while its photosensitive activity was turned off. Therefore, UO22+ can be detected based on the change of [Fe (CN)6]3-/4- electrochemical signals. Such a sensing strategy allowed the detection of UO22+ in the concentration range of 1 to 1000 nM with a detection limit of 0.13 nM. The proposed sensor has been successfully applied to the detection of UO22+ in actual water samples, with recoveries ranging from 87% to 103%. The method, which combines photocatalysis with an electrochemical biosensor, significantly improved the sensitivity of UO22+ detection without the need for labeling and additional signal amplification steps, and is a promising strategy for on-site and real-time monitoring of UO22+ in environmental water samples. © 2023, The Authors. All rights reserved.

关键词： Molecules

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Porous carbonized graphene-embedded fungus film as an interlayer for superior Li–S batteries

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Nano Energy 2015年 17卷 224-232页

作者： Liyuan Chai Jiexi Wang Haiying Wang Liyuan Zhang Wanting Yu Liqiang Mai School of Metallurgy and Environment Central South University Changsha 410083 PR China Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution Central South University Changsha 410083 PR China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 PR China Environmental Engineering Research Centre Department of Civil Engineering the University of Hong Kong Hong Kong PR China Department of Environmental Monitoring Changsha Environmental Protection College Changsha 410004 PR China

Graphene-embedded carbon fiber (GFC) film has been fabricated by using filamentous fungus ( Aspergillus niger ) as carbonizable fibers to drive the graphene nanosheets to embed in the hyphae network system and then carbonizing at 700 °C. The molecular structure of the GFC film is primarily composed of aromatic components, and the film is doped by N (8.62%) and O (8.12%) elements. The conductivity of the final product reaches as high as 0.71 S cm −1 . The GFC film serves as the conductive interlayer to greatly improve the performance of Li–S batteries including capacity retention and rate capability. By inserting the GFC film, the battery can deliver a capacity of ~700 mAh g −1 after 300 cycles at 1 C. Even performed at 5 C, it is able to deliver a reversible capacity of more than 650 mAh g −1 . This research presents a facile and effective method for the fabrication of superior macroscopic carbon monolith, which holds great potential in other forms of electrochemical energy storage.

关键词： Filamentous fungus Graphene nanosheets Lithium–sulfur batteries Interlayer

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An Array of Femtoliter Wells for Sensitive Detection of Copper Using Click Chemistry

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SSRN 2023年

作者： Ge, Chenchen Chen, Xiong Wang, Dou College of Health Science and Environmental Engineering Shenzhen Technology University 3002 Lantian Road Pingshan District Guangdong Shenzhen518118 China The Key Laboratory of Environmental Pollution Monitoring and Disease Control Ministry of Education School of Public Health Guizhou Medical University Guizhou Guiyang550025 China Shenzhen Key Laboratory of Smart Healthcare Engineering Department of Biomedical Engineering Southern University of Science and Technology No. 1088 Xueyuan Rd. Xili Nanshan District Guangdong Shenzhen518055 China

Sensitive detection of copper ion (Cu2+), which is of great importance for environmental pollution and human health, is crucial. In this study, we present a highly sensitive method for measuring Cu2+ in an array of femtoliter wells. In brief, magnetic beads (MBs) modified with alkyne groups were bound to the azide groups of biotin-PEG3-azide (bio-PEG-N3) via Cu+-catalyzed click chemistry. Cu+ in the click chemistry reaction was generated by reducing Cu2+ with sodium ascorbate. Following the ligation, the surface of the MBs was modified with biotin, whichcould be labeled with streptavidin-β-galactosidase (SβG). The MBs complex was then suspended in β-galactosidase substrate fluorescein-di-β-D-galactopyranoside (FDG), and loaded into the array of femtoliter wells. The MBs sank into the wells due to gravity, and the resulting fluorescent product, generated from the reaction between SβG on the surface of the MBs and FDG, was confined within the wells. The number of fluorescent wells increased with higher Cu2+ concentrations. The bright-field and fluorescent images of the wells were acquired using an inverted fluorescent microscope. The detection limit of this assay for Cu2+ was 1 nM without signal amplification, which was 103 times lower than that of traditional fluorescence detection assays. © 2023, The Authors. All rights reserved.

关键词： Microfluidic chips

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Spatiotemporal Distribution of Microplastics in the Ganjiang River (Ganzhou Section): Insight into the Source Area Impact

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SSRN 2022年

作者： Qin, Xinxin Sun, Nan Teng, Wenxi Zhu, Yichun Liu, Zuwen Li, Wentao Dong, Huiyu Qiang, Zhimin Zeng, Jinfeng Lian, Junfeng Jiangxi Provincial Key Laboratory of Environmental Geotechnology and Engineering Disaster Control Jiangxi University of Science and Technology 1958 Ke-jia Road Ganzhou341000 China Ganzhou Key Laboratory of Basin Pollution Simulation and Control Jiangxi University of Science and Technology 1958 Ke-jia Road Ganzhou341000 China School of Life Sciences Jinggangshan University Ji’an343009 China Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences 18 Shuang-qing Road Beijing100085 China Hydrology and Water Resources Monitoring Center for Ganjiang Upstream Watershed 8 Zhang-jia-wei Road Ganzhou341000 China

The accumulation of microplastic (MP) pollution in rivers has become a global concern;however, the underlying mechanism for spatiotemporal effects on MPs remains unclear. This study investigated the Ganjiang River source area with a field survey and found relatively low MP abundances in the target rivers (3.47 ± 0.95 items/L) owing to the small background in the riverine source area. The average MP abundance in the dry season (10.9 ± 2.33 items/L) was higher than that in the middle wet season (3.47 ± 0.95 items/L), and small MPs were prone to scouring from land. Within the predominant MP shape (fiber and fragment), size (0.125–0.5 mm), and colour (polychrome and white) distribution, the contribution of functional areas was as follows: industrial > scenic > residential > natural area. MP abundances fluctuated with different rainfall levels in the wet season, while during the period when the river flow was manually regulated, a good linear relationship was observed between river flow and MP abundance, suggesting that land scouring and transportation may play a more important role than other factors. The upper river regions predominated in the group in which the average MP abundance in the dry season was higher than that in the wet season. The small watershed area in the upstream region would lead to a low terrestrial MP number, making it easy for MP content in rivers to reach a platform. This work contributes to the understanding of MP distribution in freshwater and provides a potential guideline for MP control. © 2022, The Authors. All rights reserved.

关键词： Microplastic

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Ambient Ozone Exposure, Semen Plasma Metabolites, and Sperm Quality Decline among Adult Men in Wuhan China

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Environment & Health 2024年第10期2卷 729-738页

作者： Yangchang Zhang Shi Zhao Wangnan Cao TREE Study Team Shengzhi Sun Qiang Zeng Peng Luo School of Public Health Capital Medical UniversityBeijing 100069P.R.China School of Public Health Tianjin Medical UniversityTianjin 300070P.R.China Tianjin Key Laboratory of Environment Nutrition and Public HealthTianjin Medical UniversityTianjin 300070P.R.China Department of Social Medicine and Health Education School of Public HealthPeking UniversityBeijing 100191P.R.China 不详 School of Public Health and Beijing Municipal Key Laboratory of Clinical Epidemiology Capital Medical UniversityBeijing 100069P.R.China Department of Occupational and Environmental Health School of Public HealthTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430074P.R.China Key Laboratory of Environment and Health Ministry of Education&Ministry of Environmental ProtectionState Key Laboratory of Environmental Health(incubating)School of Public HealthTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430074 HubeiP.R.China School of Public Health The Key Laboratory of Environmental Pollution Monitoring and Disease ControlMinistry of EducationGuizhou Medical UniversityGuiyang 550025P.R.China

Ambient ozone(O3)exposure may be associated with a reduction of semen quality,yet the potential biological mechanisms remain *** investigated the effects of certain seminal plasma metabolites on mediating the links between O3 exposure and the deterioration of semen *** untargeted metabolomics analysis was performed on semen samples of 200 Chinese adult men to determine candidate metabolites associated with characteristics of semen *** analysis was adopted to examine whether these metabolites modulated the links between O3 exposure and semen *** found a significant reduction in sperm concentration by−28.1%(95%CI:−41.7%,−11.3%),and sperm count by−29.2%(95%CI:−43.7%,−11.0%)associated with each 10μg/m3 increase in ambient O3 concentration during the period of sperm *** delineated 7 metabolites in seminal fluid that substantially mediated the links between O3 exposure and declined semen quality,including myristoleic acid,aspartyl-isoleucine,phenylethyl primeveroside,ACar(18:2),ACar(18:1),FAHFA(22:6/22:3),and LPS(22:5).Among these,myristoleic acid exhibited the most pronounced mediation effects,with its indirect effect of which accounts for 46.4%of the overall *** findings suggested that exposure to ozone decreased sperm quality by disrupting fatty acid metabolism,particularly myristoleic acid.

关键词： ozone exposure sperm quality adult men metabolomics

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Response Surface Model Based Emission Source Contribution and Meteorological Pattern Analysis in Ozone Polluted Days

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SSRN 2022年

作者： Chen, Ying Zhu, Yun Lin, Chen-Jen Arunachalam, Sarav Wang, Shuxiao Xing, Jia Chen, Duohong Fan, Shaojia Fang, Tingting Jiang, Anqi Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control College of Environment and Energy South China University of Technology Guangzhou Higher Education Mega Center Guangzhou510006 China Sun Yat-Sen University Zhuhai519000 China Department of Civil and Environmental Engineering Lamar University BeaumontTX77710 United States Institute for the Environment CEMPD The University of North Carolina at Chapel Hill 100 Europa Drive Chapel HillNC27517 United States State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China Guangdong Environmental Monitoring Center Guangzhou510308 China

Urban and regional ozone (O3) pollution is a public health concern and causes damage to ecosystems. Due to the diverse emission sources of O3 precursor and the complex interactions of air dispersion and chemistry, identifying the contributing sources for O3 pollution requires integrated analysis for guiding emission reduction plans. In this study, the meteorological characteristics leading to O3 polluted days (in which the O3 levels are higher than the defined standard) in Guangzhou (GZ, China) were analyzed using the 2019 data. The O3 formation regimes, source apportionments under various prevailing wind directions were evaluated using a Response Surface Modeling (RSM) approach. The results show that O3 polluted days in GZ 2019 can be classified into four types of synoptic patterns (i.e., cyclone, anticyclone, trough, and high pressure approaching to sea) and are strongly correlated with high ambient temperature, low relative humidity, week wind speed, variable wind directions. Additionally, the cyclone pattern strongly promotes O3 formation due to its peripheral subsidence. The O3 formation is NOx-limited under the northerly wind while VOC-limited under other prevailing wind directions in GZ. Anthropogenic emissions contribute largely to the O3 formation of GZ (54-78%) under the westerly, southwesterly, easterly, southeasterly, or southerly wind, but only moderately (35-47%) under the northerly or northeasterly wind. Furthermore, local emissions have the largest O3 contributions (39-60%) regardless of prevailing wind directions, especially the local NOx contributions (19-43%). The dominant upwind regional emissions contributed to 12-46% of the O3 formation in GZ (e.g., DG contributions are 12-20% under the southeasterly wind). The emission control strategies for O3 polluted days should focus on local emission sources in conjunction with the emission reduction of upwind regional sources. © 2022, The Authors. All rights reserved.

关键词： Wind

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Corrigendum to “Transitions and suggestions for China's coastal port reclamation policies” [Ocean Coast. Manage. 236 (Feb 2023)]

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Ocean & Coastal Management 2023年 237卷

作者： Nan Wang Gaoru Zhu Xinyang Li Jinxiang Cheng Wenbin Yi Shengqiang Liu Zhenglei Xie College of Marine Science and Engineering Nanjing Normal University Nanjing Jiangsu China Laboratory of Transport Pollution Control and Monitoring Technology Transport Planning and Research Institute Ministry of Transport of the People's Republic of China Beijing 100028 China Key Laboratory of Coastal Salt Marsh Ecosystems and Resources Ministry of Natural Resources Nanjing 210023 China

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Chemical Characteristics of Air pollution with Significant Emission Changes During 2019-2021 in a Typical Industrial City of Eastern China

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SSRN 2023年

作者： Huang, Xiangpeng Li, Changping Pan, Chao Li, Yue'e Zheng, Wei Lin, Guangwu Li, Haiwei Zhang, Yunjiang Wang, Junfeng Lei, Yali Ge, Xinlei Ye, Jianhuai Zhang, Hongliang Department of Environmental Science and Engineering Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention Fudan University Shanghai200438 China 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 and Technology Nanjing210044 China School of Environmental Science and Engineering Southern University of Science and Technology Shenzhen518055 China Suzhou Environmental Monitoring Center Suzhou215011 China China Energy Science and Technology Research Institute Co. Ltd. Nanjing210023 China Key Lab of Geographic Information Science of The Ministry of Education School of Geographic Sciences East China Normal University Shanghai200241 China Shanghai200062 China IRDR ICoE on Risk Interconnectivity and Governance on Weather Climate Extremes Impact and Public Health Fudan University Shanghai200241 China

Restrictions on emission controls were implemented in China to cope with the outbreak of the Coronavirus Disease 2019 (COVID-19), providing a chance to study the impacts of anthropogenic emissions on air quality. Subsequently, three-year measurements of PM2.5 chemical composition and light absorption were conducted in a typical megacity (Suzhou) of the Yangtze River Delta in China from 2019 to 2021. Overall, the annual observation period is divided into four stages: Normal Days, Chinese New Year, Lockdown, and Work Resumption. Our results show that the concentrations of chemical species (such as NO3-, SO42-, OC, EC) in PM2.5 and other gas species, including SO2, NO2, and CO from 2019 to 2021 decreased gradually, which were associated with emission reduction. During the four stages, the COVID-19 lockdown period had the lowest concentration of BC and PM2.5, indicating that strict emission control could significantly improve the air quality. The significant increase of O3 during the COVID-19 lockdown period is likely due to the reduced emission of NO from the traffic, which could weaken the effect of NO on O3 formation. The Normal Days in 2020 has the highest mass loadings of SO42-, NO3-, NH4+, OC, and EC, while the mass concentrations of SO42-, NO3-, NH4+, Cl-, and Na+ in the Lockdown were the lowest. Meanwhile, the aerosol light absorption has decreased yearly, and the significant decreases in light absorption were observed during the COVID-19 lockdown when compared to other stages. The highest frequency of Absorption Ångström exponent (AAE) ranges from 1.3 to 1.4, indicating that brown carbon played critical contributions to the light absorption. The mass concentration and fraction of fuel fossil were significantly higher than that of biomass burning during the whole campaign. The remarkable decline of fuel fossil during the COVID-19 lockdown can be attributed to the closure of factories and the reduction of vehicle emissions. The potential contribution source funct

关键词： COVID-19

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