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SSRN 2022年

作者： Wang, Yi Chen, Xingwei Wang, Feifeng Cheng, Niansheng Fujian Provincial Engineering Research Center for Monitoring and Assessing Terrestrial Disasters Fujian Normal University Fuzhou350007 China School of Geographical Sciences Fujian Normal University Fuzhou350007 China State Key Laboratory for Subtropical Mountain Ecology The Ministry of Science and Technology and Fujian Province Fujian Normal University Fuzhou350007 China Fujian Province Key Laboratory of Pollution Control and Resource Recycling Fuj ian Normal University Fuzhou350007 China Ocean college Zhejiang University Zhoushan316021 China

Microplastics (MPs) are emerging as a class of pollutants that are a potential threat to biological and human health. The aging process can alter the physicochemical properties of MPs, which is critical to their fate and transport in the aquatic environment. This study investigated the effect of typical clay minerals on the aggregation and settling behavior of pristine and aged polyethylene microplastics (PEs) in different electrolyte solutions. The results showed that clay minerals enhance the stability of PEs by increasing electrostatic repulsion during heteroaggregation, and electrostatic interactions dominate the process of heteroaggregation. Moreover, the Hamaker constant decreases after ageing of PEs and the increased surface negative charge inhibits homoaggregation in NaCl solutions. In contrast, the specific reaction of divalent cations with the O-containing groups on the surface of aged PEs weakens the electrostatic repulsion. The aggregation mechanism is consistent with the classical Derjaguin-Landau-Verwey-Overbeek (DLVO) theory. Interestingly, typical clay minerals cause PEs, which are always suspended or floating in the upper layers of the water column, to settle through a heteroaggregation process in NaCl solutions. These results provide new insights into the environmental fate and distribution of MPs in natural waters. © 2022, The Authors. All rights reserved.

关键词： Agglomeration

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Application of amide solvents in electrolytes significantly improves specific energy of Li/CFx primary batteries

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Applied Surface Science 2025年 706卷

作者： Xu, Jianwen Zhu, Menghan Zhang, Mingdao Song, Li Jin, Yachao Jiangsu Innovation Platform of Lithium Composite-Materials for Battery R&D Institute of Energy Supply Technology for High-end Equipment Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology School of Environmental Science and Engineering Nanjing University of Information Science & Technology Jiangsu Nanjing210044 China

Lithium/Carbon Fluoride (Li/CFx) primary batteries are widely regarded as one of the most promising electrochemical energy supply technologies in the military and medical fields due to their high energy density, low self-discharge rate, and good safety performance. However, Li/CFx batteries suffer from poor power density and severe voltage hysteresis, and solutions are often considered in terms of both cathode and electrolyte. In this work, an N,N-dimethylacetamide (DMA)-based electrolyte was designed to enhance the discharge platform of Li/CFx. The results show that DMA has a high dielectric constant and can effectively improve the ionic conductivity of the electrolyte as well as increase the solubility of lithium salts in the electrolyte. The optimized electrolyte was 1 M lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) dissolved in DMA and PC (7:3 vol ratio). At 1C discharge rate, the specific capacity reached 726 mAh/g, the specific energy reached 1634 Wh/kg, and the voltage platform was raised to 2.32 V. The optimized electrolyte also demonstrates better discharge performance in pouch batteries. © 2025

关键词： Nuclear batteries

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High Contribution of New Particle Formation to Ultrafine Particles in Four Seasons in an Urban Atmosphere in South China

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SSRN 2023年

作者： Tao, Jun Tao, Li Zhou, Zhen Zhang, Leiming Wu, Cheng Li, Jiawei Yue, Dingli Wu, Zhijun Zhang, Zhisheng Yuan, Ziyang Huang, Junjun Wang, Boguang Institute for Environmental and Climate Research Jinan University Guangzhou China Dongguan Sub-branch of Guangdong Ecological and Environmental Monitoring Center Dongguan China Air Quality Research Division Science and Technology Branch Environment and Climate Change Canada Toronto Canada Institute of Mass Spectrometer and Atmospheric Environment Jinan University Guangzhou China RCE-TEA Institute of Atmospheric Physics Chinese Academy of Sciences Beijing China Guangdong Ecological and Environmental Monitoring Center Guangzhou China State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and Engineering Peking University Beijing China South China Institute of Environmental Sciences Ministry of Ecology and Environment Guangzhou China Sailbri Cooper Inc. TigardOR United States

关键词： Coal combustion

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Corrigendum to “Drivers of PM_(2.5)-O_(3) co-pollution: from the perspective of reactive nitrogen conversion pathways in atmospheric nitrogen cycling” [Sci. Bull. 67(18) (2022) 1833–1836]

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Science Bulletin 2023年第3期68卷 351-351页

作者： Feng Wang Weichao Wang Zhenyu Wang Zhongcheng Zhang Yinchang Feng Armistead GRussell 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 China Meteorological Administration-Nankai University(CMA-NKU)Cooperative Laboratory for Atmospheric Environment-Health Research College of Environmental Science and EngineeringNankai UniversityTianjin 300350China Department of Electronics and Tianjin Key Laboratory of Photo-Electronic Thin Film Device and Technology Nankai UniversityTianjin 300071China School of Civil and Environmental Engineering Georgia Institute of TechnologyAtlantaGA 30332-0512USA

The authors would like to correct Fig.1e,*** to our neglect when doing the picture layout of Fig.1,the abscissa in Fig.1e,f is error:the abscissa ranges from80 to 0 in Fig.1e and ranges from90 to20 in *** image has been corrected:the abscissa ranges from80 to 80 in Fig.1e and ranges from80 to 80 in Fig.1f[1].We declare that this correction does not change the results or conclusions of this paper.

关键词： cycling pollution correction

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Evaluation and Uncertainty Analysis of Himawari-8 Hourly Aerosol Product Version 3.1 and its Influence on Surface Solar Radiation Before and During the COVID-19 Outbreak

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SSRN 2023年

作者： Tang, Chenqian Shia, Chong Husi, Letu Ma, Run Yoshida, Mayumi Kikuchi, Maki Xu, Jian Li, Nan Zhao, Mengjie Chen, Liangfu Shi, Guangyu State Key Laboratory of Remote Sensing Science Aerospace Information Research Institute Chinese Academy of Sciences Beijing100101 China Nanjing University of Information Science & Technology Nanjing210044 China Remote Sensing Technology Center of Japan Tsukuba305-8505 Japan Japan Aerospace Exploration Agency Tsukuba305-8505 Japan National Space Science Center Chinese Academy of Sciences Beijing100190 China Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology School of Environmental Science and Engineering Nanjing University of Information Science & Technology Nanjing210044 China Institute of Tibetan Plateau Research Chinese Academy of Sciences Beijing100101 China State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric Physics Chinese Academy of Sciences Beijing100029 China University of Chinese Academy of Sciences Beijing100049 China

The hourly Himawari-8 version 3.1 (V31) aerosol product has been released and incorporates an updated Level 2 algorithm that uses forecast data as an a priori estimate. However, there has not been a thorough evaluation of V31 data across a full-disk scan, and V31 has yet to be applied in the analysis of its influence on surface solar radiation (SSR). This study firstly investigates the accuracy of V31 aerosol products, which includes three categories of aerosol optical depth (AOD) (AODMean, AODPure, and AODMerged) as well as the corresponding Ångström exponent (AE), using ground-based measurements from the AERONET and SKYNET. Results indicate that V31 AOD products are more consistent with ground-based measurements compared to previous products (V30). The highest correlation and lowest error were seen in the AODMerged, with a correlation coefficient of 0.8335 and minimal root mean square error of 0.1919. In contrast, the AEMerged shows a larger discrepancy with measurements unlike the AEMean and AEPure. Error analysis reveals that V31 AODMerged has generally stable accuracy across various ground types and geometrical observation angles, however, there are higher uncertainties in areas with high aerosol loading, particularly for fine aerosols. The temporal analysis shows that V31 AODMerged performs better compared to V30, particularly in the afternoon. Finally, the impacts of aerosols on SSR based on the V31 AODMerged are investigated through the development of a sophisticated SSR estimation algorithm in the clear sky. Results demonstrate that the estimated SSR is significant consistency with those of well-known CERES products, with preservation of 20 times higher spatial resolution. The spatial analysis reveals a significant reduction of AOD in the North China Plain before and during the COVID-19 outbreak, resulting in an average 24.57 W m–2 variation of the surface shortwave radiative forcing in clear sky daytime. © 2023, The Authors. All rights reserved.

关键词： COVID-19

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Anaerobic Granular Sludge Performance in an Expanded Granular Sludge Bed Reactor Treating Calcium-Rich Wastewater by Adjusting Caco3 Crystallization: Effect of Upflow Velocity and Ca2+ Concentration

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SSRN 2023年

作者： Liu, Xiaoji Pan, Dongning Yuan, Quan Feng, Xiyuan Li, Meixuan Song, Xuening Li, Meiling Ge, Yajuan Xing, Yukun Yu, Yuanzhou Jin, Zhengyu Key Laboratory of Ecology and Environment in Minority Areas National Ethnic Affairs Commission College of Life & Environmental Sciences Minzu University of China Beijing100081 China School of Ecology and Environment Beijing Technology and Business University Beijing100048 China CECEP（Feixi）WTE CO. Ltd Hefei231241 China State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China Harbin Institute of Technology Software Engineering Co. Ltd Harbin150028 China Tianjin Research Institute for Water Transport Engineering M.O.T Tianjin300000 China Huanan Construction Limited Company China Construction Sixth Engineering Bureau Shenzhen518108 China

The role of upflow velocity and Ca2+ concentration in controlling the type and rate of CaCO3 crystallization and their impacts on an expanded granular sludge bed (EGSB) reactor were studied. An improved upflow velocity could promote metastable CaCO3 crystals and achieve the optimized portion of vaterite with a value of 84% at 10 m/h with a small amount of aragonite, thus limiting the scaling in the reactor. The calcium concentration was found similar impacts on CaCO3 crystalline phases. Through stepwise setup of increasing upflow velocity and organic loading rate (OLR), granules cultivated in R3 (Ca2+ 800 mg/L) revealed maximum amount of biomass with biggest particle size distribution and fastest average settling rate, with relative stable COD removal efficiency and the fast optimized reactor capacity at OLR of 16 kgCOD/m3d. A low upflow velocity and a higher Ca2+ concentration could be applied at the initial cultivation stage of the EGSB reactor to promote nucleus formation and granules growth. The Ca2+ concentration had a significant impact on the bacterial community and favoured the growth of Tolumonas and Anaeromousa Anaeroarcus. Archaea, rather than bacteria, was strengthened to contribute more to methane production at a relatively high Ca2+ concentration. © 2023, The Authors. All rights reserved.

关键词： Anaerobic digestion

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controlling Nucleophilic Emerging Organic Contaminants (Eocs) Using an Inorganic Oxidizing Coagulant (Ioc) Based on the Synergistic Oxidation-Induced Coagulation Mechanisms

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SSRN 2024年

作者： Wang, Lili Xu, Weiying Xu, Zhenghe Zhu, Yuanji Song, Yan Wang, Dongsheng Xin, Xiaodong Jia, Ruibao Xu, Xing School of Water Conservancy and Environment University of Jinan No. 336 Nanxinzhuang Western Road Shandong Jinan250022 China Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental Science Chinese Academy of Science No. 18 Shuangqing Road Beijing100085 China Economic & Technology Research Institute of State Grid Shandong Electric Power Company No. 111 Weishi Road Shandong Jinan250021 China Shandong Province City Water Supply and Drainage Water Quality Monitoring Center No 5111 Aoti Middle Road Shandong Jinan250013 China Department of Environmental Engineering College of Environmental & Resource Sciences Zhejiang University No 866 Yuhangtang Road Zhejiang Hangzhou310013 China Shandong Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science and Engineering Shandong University Shandong Qingdao266237 China Shandong Jianzhu University China

Coagulation is not effective in treatment of emerging organic contaminants (EOCs) contaminated water and wastewater, and many researches focus on the hybrid technologies. In this study, a multifunctional inorganic oxidizing coagulant (IOC) was developed by a simple alkaline co-polymerization method to increase the efficiency and feasibility of coagulation in elimination of low molecular weight (MW) organic compounds, which were demonstrated by eight kinds of representative EOCs. The IOC present exceptional removal capabilities for hydrophilic with low logKow and nucleophilic (high NI) EOCs, like sulfamethazine (SMZ), tetracycline (TC), and ciprofloxacin (CIP), achieving removal efficiencies of 45-95%. The dynamic coagulation investigation conducted through continuous monitor on floc formation and growth demonstrated that large floc played minor role in EOCs removal. Instead, an obvious positive correlation between removal efficiency (REOCs) and floc growth rate (Sfloc), which was associated with the reactivity of EOCs with coagulant, was observed. Combined with the electron paramagnetic resonance (EPR) and ultra-high-performance liquid chromatography high-resolution mass spectrometry (UHPLC-HRMS) results, an innovative coagulation mechanism for EOCs abatement by IOC, namely oxidation-induced coagulation was proposed. Oxidizing agent in IOC promoted the formation of activate intermediates through nonradical pathway, which were more prone to complexation with aluminum than their original condition. Comparatively, traditional charge neutralization, adsorption and sweeping mechanisms involved in the aluminum sulfate (AS) and poly-aluminum chloride (PACl) coagulation systems, which generally lead to large but invalid flocs, turned out to inapplicable to EOCs removals. This study provides a novel strategy and inorganic coagulant for EOCs-contained water and wastewater treatments based on the oxidation-induced complexation mechanism, which was demonstrated to be a promisin

关键词： Aluminum chloride

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Source attribution for mercury deposition with an updated atmospheric mercury emission inventory in the Pearl River Delta Region, China

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Frontiers of Environmental Science & Engineering 2019年第1期13卷 39-52页

作者： Jiajun Liu Long Wang Yun Zhu Che-Jen Lin Carey Jang Shuxiao Wang Jia Xing Bin Yu Hui Xu Yuzhou Pan Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control College of Environment and Energy South ChinaUniversity of Technology Guangzhou Higher Education Mega Center Guangzhou 510006 China Department of Civil and Environmental Engineering Lamar University Beaumont TX 77710 USA US EPA Office of Air Quality Planning & Standards Res Triangle Park NC 27711 USA State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment. Tsinghua University Beijing 100084 China Guangzhou Environmental Monitoring Centre Guangzhou 510030 China

We used CMAQ-Hg to simulate mercury pollution and identify main sources in the Pearl River Delta (PR.D) with updated local emission inventory and latest regional and global emissions. The total anthropogenic mercury emissions in the PRD for 2014 were 11,939.6 kg. Power plants and industrial boilers were dominant sectors, responsible for 29.4 and 22.7%. We first compared model predictions and observations and the results showed a good performance. Then five scenarios with power plants (PP), municipal solid waste incineration (MSWI), industrial point sources (IP), natural sources (NAT), and boundary conditions (BCs) zeroed out separately were simulated and compared with the base case. BCs was responsible for over 30% of annual average mercury concentration and total deposition while NAT contributed around 15%. Among the anthropogenic sources, IP (22.9%) was dominant with a contribution over 20.0% and PP (18.9%) and MSWI (11.2%) ranked second and third. Results also showed that power plants were the most important emission sources in the central PRD, where the ultra-low emission for thermal power units need to be strengthened. In the northern and western PRD, cement and metal productions were priorities for mercury control. The fast growth of municipal solid waste incineration were also a key factor in the core areas. In addition, a coordinated regional mercury emission control was important for effectively controlling pollution. In the future, mercury emissions will decrease as control measures are strengthened, more attention should be paid to mercury deposition around the large point sources as high levels of pollution are observed.

关键词： Emission inventory Mercury deposition Pearl River Delta (PRD) Source attribution control strategy

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Development and Application of a Hydrophilic Solid Phase Microextraction Fiber for in Vivo monitoring Neonicotinoid Insecticides in Bean Sprouts

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SSRN 2025年

作者： Huang, Zhoubing Lei, Shuang Liang, Guangyan Ding, Minli Sun, Dali Xie, Meng-Yi The Key Laboratory of Environmental Pollution Monitoring and Disease Control Ministry of Education School of Public Health Guizhou Medical University New Area Guian561113 China State Key Laboratory of Discovery Utilization of Functional Components in Traditional Chinese Medicine Guizhou Medical University Guiyang550014 China School of Environment and Energy Institute of Environmental Health South China University of Technology Guangzhou510006 China

Conventional solid-phase microextraction fibers are primarily designed for detecting and analyzing of hydrophobic compounds, with limited applicability for hydrophilic compounds. This limitation restricts the in vivo application of solid-phase microextraction technology for hydrophilic substances. In the present study, a novel in vivo SPME fiber, exhibiting superior affinity for neonicotinoids, was developed. The custom-designed fiber exhibited outstanding sampling performance, robust reproducibility with an inter-fiber relative standard deviation of 6.0−10.3%, and a low detection limit of 0.05 ng mL-1. The accuracy of the in-house in vivo solid phase microextraction fiber was found to be comparable to that of traditional liquid-liquid extraction methods, while demonstrating superior extraction efficiency. The developed fiber was successfully employed to monitor the degradation kinetics of four neonicotinoid insecticides (acetamiprid, imidacloprid, thiacloprid, and thiamethoxam) in bean sprouts. Differences in the metabolic rates of these insecticides within the bean sprouts were revealed by the elimination kinetics. Also, their elimination half-lives followed the sequence of acetamiprid (0.42 days) > thiamethoxam (0.85 days) > imidacloprid (0.95 days) > clothianidin (1.13 days). The in vivo solid-phase microextraction fiber developed in this study provided operational simplicity and high extraction efficiency, making it a crucial tool for pesticide toxicology research and safety assessment of agricultural products. © 2025, The Authors. All rights reserved.

关键词： Insecticides

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Application of multi-angle spaceborne observations in characterizing the long-term particulate organic carbon pollution in China

Research Square

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Research Square 2023年 rs3rs-3734829页

作者： Hang, Yun Pu, Qiang Zhu, Qiao Meng, Xia Jin, Zhihao Liang, Fengchao Tian, Hezhong Li, Tiantian Wang, Tijian Cao, Junji Fu, Qingyan Dey, Sagnik Li, Shenshen Huang, Kan Kan, Haidong Shi, Xiaoming Liu, Yang Gangarosa Department of Environmental Health Rollins School of Public Health Emory University AtlantaGA30322 United States Department of Environmental and Occupational Health Sciences School of Public Health University of Texas Health Science Center at Houston HoustonTX77030 United States School of Public Health Fudan University Shanghai200032 China School of Public Health and Emergency Management Southern University of Science and Technology Shenzhen518055 China State Key Laboratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal University Beijing100875 China China CDC Key Laboratory of Environment and Population Health National Institute of Environmental Health Chinese Center for Disease Control and Prevention Beijing100021 China School of Atmospheric Sciences Nanjing University Nanjing210023 China Institute of Atmospheric Physics Chinese Academy of Sciences Beijing100101 China State Ecologic Environmental Scientific Observation and Research Station at Dianshan Lake Shanghai Environmental Monitoring Center Shanghai200235 China Centre for Atmospheric Sciences Indian Institute of Technology Delhi Hauz Khas New Delhi110016 India State Key Laboratory of Remote Sensing Science Aerospace Information Research Institute Chinese Academy of Sciences Beijing100101 China Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention Department of Environmental Science and Engineering Fudan University Shanghai200433 China

Ambient PM2.5 pollution is recognized as a leading environmental risk factor, causing significant mortality and morbidity in China. However, the specific contributions of individual PM2.5 constituents remain unclear, primarily due to the lack of a comprehensive ground monitoring network for constituents. This issue is particularly critical for carbonaceous species such as organic carbon (OC) and elemental carbon (EC), which are known for their significant health impacts, and understanding the OC/EC ratio is crucial for identifying pollution sources. To address this, we developed a Super Learner model integrating Multi-angle Imaging SpectroRadiometer (MISR) retrievals to predict daily OC concentrations across China from 2003 to 2019 at a 10-km spatial resolution. Our model demonstrates robust predictive accuracy, as evidenced by a random cross-validation R2 of 0.84 and an RMSE of 4.9 μg/m3, at the daily level. Although MISR is a polar-orbiting instrument, its fractional aerosol data make a significant contribution to the OC exposure model. We then use the model to explore the spatiotemporal distributions of OC and further calculate the EC/OC ratio in China. We compared regional pollution discrepancies and source contributions of carbonaceous pollution over three selected regions: Beijing-Tianjin-Hebei, Fenwei Plain, and Yunnan Province. Our model observes that OC levels are elevated in Northern China due to industrial operations and central heating during the heating season, while in Yunnan, OC pollution is mainly contributed by local forest fires during fire seasons. Additionally, we found that OC pollution in China is likely influenced by climate phenomena such as the El Niño-Southern Oscillation. Considering that climate change is increasing the severity of OC concentrations with more frequent fire events, and its influence on OC formation and dispersion, we suggest emphasizing the role of climate change in future OC pollution control policies. We believe this stu

关键词： Remote sensing

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