检索结果-内蒙古大学图书馆

SSRN 2022年

作者： Lian, Xiufeng Zhang, Guohua Yang, Yuxiang Chena, Mubai Yang, Wenda Cheng, Chunlei Huang, Bo Fu, Zhong Bi, Xinhui Zhoua, Zhen Lia, Mei Institute of Mass Spectrometry and Atmospheric Environment Guangdong Provincial Engineering Research Center for On-line Source Apportionment System of Air Pollution Jinan University Guangzhou510632 China State Key Laboratory of Organic Geochemistry Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou510640 China Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality Guangzhou510632 China Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou510640 China Guangzhou Hexin Analytical Instrument Company Limited Guangzhou510530 China

Although recent laboratory simulations have demonstrated that organics prevent PAHs from degradation, its role in the long-range transport of PAHs in the real atmosphere remains poorly understood. In this study, we measured the chemical composition and mixing state of PAHs-containing individual particles in aerosols from three sources, one urban area and one remote area. PAHs-containing particles are classified into five types: organic carbon (OC), KOC, KNa, Krich and PAH-rich. PAH-rich and KOC particles were the main particle types of vehicle exhaust/coal burning and biomass burning, respectively, accounting for > 50% of the PAHs-containing particles. Organics enhancement in PAHs-containing particles in the ambient atmosphere, with organic-rich (OC and KOC) particles accounting for > 90%. Further analysis suggests the increased abundance of total PAHs was closely related to the increase of the number fractions of PAHs particles mixed with organics at the remote site. This is due to the protection of organics against PAHs and/or the aging of PAHs-containing particles. Our results enhance the understanding of the chemical composition and mixing state of PAHs particles in atmospheric aerosols from emission sources and urban and remote areas, and provide field observational evidence to support the promotion of long-range transport of PAHs by organics. © 2022, The Authors. All rights reserved.

关键词： Polycyclic aromatic hydrocarbons

来源：评论

学校读者我要写书评

暂无评论

The Research on Co Oxidation Over Ce-Mn Oxides: The Preparation Method Effects and Oxidation Mechanism

SSRN

引用

SSRN 2023年

作者： Ye, Zhiping Liu, Yang Nikiforov, Anton Ji, Jiayu Zhao, Bo Wang, Jiade College of Environment Zhejiang University of Technology 18 Chaowang RD Hangzhou310014 China Ghent University Faculty of Engineering Department of Applied Physics Research Unit Plasma Technology Sint-Pietersnieuwstraat 41 Ghent9000 Belgium Zhejiang Tuna Environmental Science & Technology Co. Ltd Shaoxing312071 China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing100084 China

A series of CeO2-MnOx for highly efficient catalytical oxidation of carbon monoxide were prepared by citrate sol-gel (C), hydrothermal (H) and hydrothermal-citrate complexation (CH) methods. The outcome indicates that the catalyst generated using the CH technique (CH-1:8) demonstrated the greatest catalytic performance for CO oxidation with a T50 of 98°C, and also good stability in 1400 min. Compared to the catalysts prepared by C and H method, CH-1:8 has the highest specific surface of 156.1 m2/g, and the better reducibility of CH-1:8 was also observed in CO-TPR. It is also observed the high ratio of adsorbed oxygen/lattice oxygen (1.5) in the XPS result. Moreover, characterizations by the TOF-SIMS method indicated that obtained catalyst CH-Ce/Mn=1:8 had stronger interactions between Ce and Mn oxides, and the redox cycle of Mn3++Ce4+→ Mn4++Ce3+ was a key process for CO adsorption and oxidation process. According to in-situ FTIR, the possible reaction pathway for CO was deduced in three ways. CO directly oxidize with O2 to CO2, CO adsorbed on Mn4+ and Ce3+ reacts with O to form intermediates (COO-)(T>50°C) and carbonates (T>90°C), which are further oxidized into CO2. © 2023, The Authors. All rights reserved.

关键词： Carbon dioxide

来源：评论

学校读者我要写书评

暂无评论

Absorption enhancement of black carbon particles in the Pearl River Delta region

Absorption enhancement of black carbon particles in the Pear...

引用

第22届中国大气环境科学与技术大会暨中国环境科学学会大气环境分会2016年学术年会

作者： Xinhui Bi Guohua Zhang Long Peng Qinhao Lin Xinming Wang Mei Li Duohong Chen Ning Qiu Ping'an Peng Guoying Sheng Zhou Zhen South China Sea Institute of Oceanology Chinese Academy of SciencesGuangzhou 510301PR China State Environmental Protection Key Laboratory of Regional Air Quality Monitoring Guangdong Environmental Monitoring CenterGuangzhou 510308PR China Graduate University of Chinese Academy of Sciences Beijing 100039PR China State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Resources Utilization and Protection Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640PR China Atmospheric Environment Institute of Safety and Pollution Control Jinan UniversityGuangzhou 510632PR China

Mixing state of black carbon(BC)on light absorption is of enduring interest due to its tight connection to regional/global *** we present first concurrent measurements of both BC absorption enhancement(Eabs)and chemic...

关键词：

来源：评论

学校读者我要写书评

暂无评论

Filtration performance of biofilm membrane bioreactor: Fouling control by threshold flux operation

引用

Chemosphere 2024年 362卷 142458页

作者： Zhang, Wenxiang Liang, Wenzhong Jin, Jiarou Meng, Shujuan He, Ziqiang Ali, Muhammad Saikaly, Pascal E. Guangzhou511458 China State Environmental Protection Key Laboratory of Water Environmental Simulation and Pollution Control South China Institute of Environmental Sciences Ministry of Ecology and Environment of the People's Republic of China Guangzhou510655 China School of Materials Science and Engineering Beihang University Beijing100191 China Key Laboratory of Electromechanical Equipment Safety in Western Complex Environment for State Market Regulation Chongqing Special Equipment Inspection and Research Institute Chongqing401121 China Department of Civil Structural & Environmental Engineering Trinity College Dublin The University of Dublin Dublin 2 Ireland Thuwal23955-6900 Saudi Arabia

Membrane fouling is the major factor that restricts the furtherly widespread use of membrane bioreactor (MBR). As a new generation of MBR, biofilm membrane bioreactor (BF-MBR) demonstrates high treatment efficiency and low sludge growth rate, however the filtration performance improvement and membrane fouling control are still the challenges for its further development. This work investigated the filtration performance using resistance in series model and membrane fouling control via threshold flux for BF-MBR. At first, the flux behavior and filtration resistance under various operating conditions, including agitation speed, membrane and TMP, were explored by resistance in series model. Because of the desirable anti-fouling capacity, UP100 and UP030 had the high threshold flux (100 and 90 L m−2 h−1) and low irreversible fouling resistance (1 and 1.3 × 10−10 m-1). Higher shear stress produced by higher agitation speed could reduce membrane fouling, while greatly promote the threshold flux (138 L m−2 h−1) and membrane cleaning efficiency (96%). Moreover, increasing shear stress or selecting membrane with large pore size could decrease the fouling rate and raise the threshold flux. As for TMP, high TMP reduced the removal rate for organic and nutrient, and enhanced the irreversible fouling. Besides, the aerobic-BF-MBR (101 L m−2 h−1 and 1.3 × 10−10 m-1) with lower foulant concentration had a better filtration performance than anoxic-BF-MBR (90 L m−2 h−1 and 1.5 × 10−10 m-1). Additionally, the long-term tests with 10 cycles were conducted to evaluate the industrial application value of BF-MBR (45–58 L m−2 h−1). This work provides the technical support for sustainable filtration performance of BF-MBR. © 2024 Elsevier Ltd

关键词： Bioreactors

来源：评论

学校读者我要写书评

暂无评论

Accelerating environmental Research to Achieve Sustainable Development Goals

引用

environmental SCIENCE & TECHNOLOGY LETTERS 2023年第11期10卷 961-962页

作者： Mihelcic, James R. Barra, Ricardo O. Brooks, Bryan W. Diamond, Miriam L. Eckelman, Matthew J. Gibson, Jacqueline MacDonald Guidotti, Sunny Ikeda-Araki, Atsuko Kumar, Manish Maiga, Ynoussa McConville, Jennifer Miller, Shelly L. Pizarro, Valeria Rosario-Ortiz, Fernando Wang, Shuxiao Zimmerman, Julie B. Department of Civil & Environmental Engineering University of South Florida 4202 E Fowler Ave ENG 030 Tampa Florida 33620 United States Faculty of Environmental Sciences and EULA Chile Centre University of Concepcion Barrio Universitario s/n Concepción 4070386 Chile Department of Environmental Science Baylor University One Bear Place #97266 Waco Texas 76798-7266 United States Department of Earth Sciences and School of the Environment University of Toronto Toronto M5S 1A1 ON Canada College of Engineering Northeastern University Boston Massachusetts 02115 United States Department of Civil Construction and Environmental Engineering North Carolina State University Fitts-Woolard Hall Room 3253 915 Partners Way Raleigh North Carolina 27695-7908 United States UNICEF Latin America and Caribbean Regional Office Building 102 Alberto Tejada Street City of Knowledge 0843 Republic of Panama Faculty of Health Sciences Hokkaido University Kita 12 Nishi 5 Kitaku Sapporo 060-0812 Japan Sustainability Cluster School of Engineering University of Petroleum & Energy Studies Dehradun Uttarakhand 248007 India Escuela de Ingenieria y Ciencias Tecnologico de Monterrey Campus Monterey Monterrey 64849 Nuevo León Mexico Laboratory of Microbiology and Microbial Biotechnology UFR SVT University Joseph KI-ZERBO 03 BP 7021 Ouagadougou Burkina Faso Department of Energy and Technology Swedish University of Agricultural Sciences Box 7032 Uppsala SE-750 07 Sweden Department of Mechanical Engineering University of Colorado Boulder 427 UCB Boulder Colorado 80309-0427 United States Perry Institute for Marine Science Windsor School (Albany Campus) Frank Watson Boulevard Adelaide The Bahamas Department of Civil Environmental and Architectural Engineering Environmental Engineering Program University of Colorado Boulder Colorado 80309 United States State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084

来源：评论

学校读者我要写书评

暂无评论

Significant reduced traffic in Beijing failed to relieve haze pollution during the COVID-19 lockdown: implications for haze mitigation

arXiv

引用

arXiv 2020年

作者： Lv, Zhaofeng Wang, Xiaotong Deng, Fanyuan Ying, Qi Archibald, Alexander T. Jones, Roderic L. Ding, Yan Cheng, Ying Fu, Mingliang Liu, Ying Man, Hanyang Xue, Zhigang He, Kebin Hao, Jiming Liu, Huan State Key Joint Laboratory of ESPC State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex International Joint Laboratory on Low Carbon Clean Energy Innovation School of the Environment Tsinghua University Beijing100084 China Zachry Department of Civil and Environmental Engineering Texas A&M University College StationTX77843 United States Centre for Atmospheric Science Department of Chemistry University of Cambridge CB2 1EW United Kingdom Chinese Research Academy of Environmental Sciences Beijing100012 China Beijing Transport Institute Beijing100073 China

The COVID-19 outbreak greatly limited human activities and reduced primary emissions particularly from urban on-road vehicles, but coincided with Beijing experiencing "pandemic haze", raising the public concerns of the validity and effectiveness of the imposed traffic policies to improve the air pollution. Here, we explored the relationship between local vehicle emissions and the winter haze in Beijing before and during the COVID-19 lockdown period based on an integrated analysis framework, which combines a real-time on-road emission inventory, in-situ air quality observations and a localized chemical transport modeling system. We found that traffic emissions decreased substantially affected by the pandemic, with a higher reduction for NOx (75.9%, 125.3 Mg/day) compared to VOCs (53.1%, 52.9 Mg/day). Unexpectedly, our results show that the imbalanced emission abatement of NOx and VOCs from vehicles led to a significant rise of the atmospheric oxidizing capacity in urban areas, but only resulting in modest increases in secondary aerosols due to the inadequate precursors. However, the enhanced oxidizing capacity in the surrounding regions greatly increased the secondary particles with relatively abundant precursors, which is mainly responsible for Beijing haze during the lockdown period. Our results indicate that the winter haze in Beijing was insensitive to the local vehicular emissions reduction due to the complicated nonlinear response of the fine particle and air pollutant emissions. We suggest mitigation policies should focus on accelerating VOC and NH3 emissions reduction and synchronously controlling regional sources to release the benefits on local traffic emission control. Copyright © 2020, The Authors. All rights reserved.

关键词： Roads and streets

来源：评论

学校读者我要写书评

暂无评论

Enhancing rice production sustainability and resilience via reactivating small water bodies for irrigation and drainage (vol 14, 3794, 2023)

引用

NATURE COMMUNICATIONS 2023年第1期14卷 1-11页

作者： Li, Sisi Zhuang, Yanhua Liu, Hongbin Wang, Zhen Zhang, Fulin Lv, Mingquan Zhai, Limei Fan, Xianpeng Niu, Shiwei Chen, Jingrui Xu, Changxu Wang, Na Ruan, Shuhe Shen, Wangzheng Mi, Menghan Wu, Shengjun Du, Yun Zhang, Liang Hubei Provincial Engineering Research Center of Non-Point Source Pollution Control Innovation Academy for Precision Measurement Science and Technology Chinese Academy of Sciences Wuhan 430077 PR China Key Laboratory for Environment and Disaster Monitoring and Evaluation of Hubei Wuhan 430077 PR China University of Chinese Academy of Sciences Beijing 100049 PR China Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing 100081 PR China State Environmental Protection Key Laboratory of Soil Health and Green Remediation Huazhong Agricultural University Wuhan 430070 PR China Interdisciplinary Research Center for Territorial Spatial Governance and Green Development Huazhong Agricultural University Wuhan 430070 PR China Institute of Plant Protection Soil and Fertilizer Sciences Hubei Academy of Agricultural Sciences Wuhan 430064 PR China Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences Chongqing 400714 PR China Liaoning Academy of Agricultural Sciences Shenyang 110161 PR China Institute of Soil & Fertilizer and Resources & Environment Jiangxi Academy of Agricultural Sciences Nanchang 330200 PR China

Rice farming threatens freshwater resources, while also being increasingly vulnerable to drought due to climate change. Rice farming needs to become more sustainable and resilient to climate change by improving irrigation drainage systems. Small water bodies, used to store drainage water and supply irrigation in traditional rice farming systems have gradually been abandoned in recent decades. This has resulted in a higher water footprint (WF) associated with rice farming due to increased freshwater usage and wastewater release, also leaving rice production more vulnerable to extreme weather events. Here, we propose how protecting and reactivating small water bodies for rice irrigation and drainage can decrease rice production WF in China by 30%, save 9% of China’s freshwater consumption, increase irrigation self-sufficiency from 3% to 31%, and alleviate yield loss in dry years by 2–3%. These findings show that redesigning rice irrigation drainage systems can help meet water scarcity challenges posed by climate change.

关键词： environmental health Hydrology Wetlands ecology

来源：评论

学校读者我要写书评

暂无评论

Comparative Analysis of Nitrate Evolution Patterns During pollution Episodes: Method Development and Results from Tianjin, China

SSRN

引用

SSRN 2022年

作者： Li, Yafei Han, Yan Ma, Simeng Zhang, Yufen Wang, Haoqi Yang, Jingyi Yao, Lu Bi, Xiaohui Wu, Jianhui Feng, Yinchang State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control Center for Urban Transport Emission Research College of Environmental Science and Engineering Nankai University Tianjin300350 China CMA-NKU Cooperative Laboratory for Atmospheric Environment-Health Research Tianjin300000 China Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences Chongqing 400714 China

Nitrate plays an increasingly important role in the formation of pollution process, while the main mechanisms of nitrate concentration change are different in each stage, same as the driving factors. In this study, we proposed an episode-based analysis to illustrate the typical nitrate evolution patterns and identify the possible impacting factors in different evolution stages. Applying into twelve pollution episodes, three typical patterns of nitrate evolution were abstracted, and the corresponding conceptual models were constructed. All the pollution episodes were grouped by their evolving shapes, which were driven by physical and chemical processes. Type 1 ("hump-shaped type"), accounting for 66.3% of the total episode durations, including two "peak" concentrations, displays a rapid growth rate, mainly relying on the sharp drop in the planetary boundary layer height. Type 2 ("triangle-shaped type", 24.3%) shows a gentle growth rate and short duration. Both physical and chemical effects are weaker compared with Type 1. Type 3 ("trapezoid-shaped type", 9.4%) presents a long platform stage, during which the source and sink keep balance. Our study highlights the importance of pattern identification for understanding the nitrate evolution behavior, it may also provide insights for pollution prediction and scientific mitigation strategies. © 2022, The Authors. All rights reserved.

关键词： Nitrates

来源：评论

学校读者我要写书评

暂无评论

Efficiently Removing Dissolved Organic Pollutants in Landfill Leachate Concentrate Using Dual-Anode Fe2+/Hclo System: The Significance of Insolubilization Based On Oxidative Coupling of Organics

SSRN

引用

SSRN 2023年

作者： Liang, Sheng Wang, Jinling Shen, Zhizhi Yan, Wei Nengzi, Lichao Feng, Chunhua Yu, Li Hu, Junqing College of Health Science and Environmental Engineering Shenzhen Technology University Shenzhen518118 China Faculty of Chemical Engineering Kunming University of Science and Technology Kunming650500 China State Environmental Protection Key Laboratory of Managing Technology of Drinking Water Source Shenzhen Academy of Environmental Science Shenzhen518001 China Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters Ministry of Education School of Environment and Energy South China University of Technology Guangzhou510006 China

The strategy to mineralize dissolved organics for the decontamination of landfill leachate concentrate (LLC) is expensive. Because mineralization requires high stoichiometric ratio of oxidants (e.g., •OH) or electron transfer (i.e., energy) to the pollutants molecular. Whereas, transferring the dissolved organic pollutants into separable insoluble matters is an energy-saving strategy. Herein, we developed a dual-anode Fe2+/HClO system for removing dissolved organic pollutants in LLC through insolubilization based on oxidative coupling. In this system, the majority of dissolved organic pollutants were transferred into insoluble substances, which could be removed easily. 89.8% of the dissolved organic carbon (DOC) in LLC was fast removed in 3 hours with a low specific energy consumption (SEC, 4.0 kWh kg-1 COD and 17.6 kWh kg-1 DOC), and the formation of toxic by-products can be well controlled. Interestingly, the formation of insoluble substances was predominantly attributed to the oxidative coupling of organic small molecules into the macromolecular ones. This was evidenced by the generation of insoluble compounds with the larger molecular mass (evidenced by mass spectrums), and the formation of coupling or polymerization products of the model pollutant (guaiacol). Specifically, the macromolecular matters were derived from the organic radicals (evidenced by EPR tests) coupling with each other. It was reported that Fe2+/HClO reaction produced reactive Fe(IV) under acid condition. According to the investigations in this work, we propose it is possibly because Fe(IV) was generated in the dual-anode Fe2+/HClO system, and Fe(IV) oxidized pollutants to produce the organic radicals. This work offers a novel electrochemical method for efficient removal of organic pollutants in LLC with minimal toxic by-products generated, and revealed the significance of oxidative coupling process in the electrochemical Fe2+/HClO system. © 2023, The Authors. All rights reserved.

关键词： Organic pollutants

来源：评论

学校读者我要写书评

暂无评论

Intelligent Sniffer: A Chip-Based Portable E-Nose for Accurate and Fast Essence Evaluation

SSRN

引用

SSRN 2024年

作者： Jiang, Yiwei Wang, Ziyi Hu, Yan Lin, Wenhao Yao, Longchao Xiao, Wenfang Hu, Jiangxue Liu, Weijie Zheng, Chenghang Chen, Linghong Gao, Xiang State Key Laboratory of Clean Energy Utilization State Environment Protection Engineering Center for Coal-Fired Air Pollution Control Zhejiang University Hangzhou310027 China Ningbo Innovation Center Zhejiang University Ningbo315100 China Zhejiang Ecological and Environmental Monitoring Center Hangzhou310012 China Jiaxing Research Institute Zhejiang University Jiaxing314000 China

Electronic nose (e-nose) is capable of identifying gases of different odors and concentrations. However, accurate odor evaluation of complicated volatile compounds (e.g., from essence) at human perception level remains challenging, especially in a fast and cheap way. This study presents a portable e-nose designed to evaluate different essence samples and their mixtures that outperforms human olfaction. Given the complexity and similarity of ingredients among different essence types, six sensors were integrated on a miniaturized chip after the sensor array optimization from 18 gas-sensing materials with varying doping, film thicknesses, operated at different temperatures. A pattern recognition model based on Long-short term memory network and convolutional neural network was developed to automatically extract sensors’ dynamic response features to determine essence type and concentration. Our e-nose exhibited high sensitivity and repeatability to analyze low-concentration essence volatiles better than human olfactory tests. The classification accuracy for four similar textile essence and their mixtures could reach up to 96.9%. And the R2 and RMSE for relative concentration achieved 0.98 and 0.068%, respectively. Furthermore, only the first 60 s signals are needed for the sample analysis which significantly reduced the sample testing time compared to the traditional base-peak-base test method (over 200 s). This research provides a favorable opportunity for essence fragrance prediction in various applications such as food, textile, cosmetics, etc. © 2024, The Authors. All rights reserved.

关键词： Electronic nose

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：