检索结果-内蒙古大学图书馆

SSRN 2023年

作者： Yuan, Ying Shi, Junxiang Xie, Weisong Wang, Guangwei Wang, Yang Tang, Jun Lu, Haojie 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 Guizhou Academy of Environmental Science and Design Guiyang550081 China Tianjin Branch Tianjin300450 China

In this study, silicate-iron (FeSi-ox, FeAlSi-ox) in aquifer media was utilized as an original iron source in groundwater to systematically investigate the effects of ascorbic acid on the degradation of p-nitrophenol (PNP) in the in-situ Fenton-like reaction. Silicate-iron in the aquifer media increased the PNP removal rate by activing H2O2 following the addition of ascorbic acid. The optimal removal rate of PNP was nearly 89% within 40 h, which was 6.8 times higher than that without ascorbic acid. In addition to PNP, some other common pollutants, such as nitrobenzene, trichloromethane, and trichloroethylene, can also be effectively degraded and mineralized. The suitable pH range for the silicate-iron Fenton-like system with ascorbic acid was 5-9, indicating that it is feasible in near-neutral or alkaline groundwater environments. The main functional free radicals were hydroxyl free radicals (•OH), which were produced slowly but continuously. In this novel Fenton-like system, dissolved Fe played a major role in H2O2 decomposition and pollutant degradation. The main mechanism underlying the increased strength of the degradation was the ability of ascorbic acid to facilitate the dissolution of surface Fe from aquifer media and accelerate the cycling of Fe(Ⅲ)/Fe(Ⅱ) in the liquid phase. © 2023, The Authors. All rights reserved.

关键词： Ascorbic acid

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Characterizing ammonia emission from light-duty gasoline vehicles under the influence of multiple factors and its correlation with conventional pollutants

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Science of the Total environment 2024年 945卷 173967页

作者： Jiang, Han Zhao, Haiguang Lai, Yitu Kang, Yu Cao, Yang Fu, Mingliang Ding, Yan State Environmental Protection Key Laboratory of Vehicle Emission Control and Simulation Chinese Research Academy of Environmental Sciences Beijing100012 China Vehicle Emission Control Center of Ministry of Ecology and Environment Chinese Research Academy of Environmental Sciences Beijing100012 China Xiamen Environment Protection Vehicle Emission Control Technology Center Xiamen361023 China Department of Automation University of Science and Technology of China Hefei230026 China

Ammonia (NH3), which is a precursor of secondary particulate matter (PM), can be produced through three-way catalyst (TWC) side reactions in light-duty gasoline vehicles (LDGVs), posing a threat to human health and air quality. To explore ammonia emission characteristics, 8 LDGVs and 1 hybrid electric light-duty vehicle (HEV) with various mileages traveled were analyzed with a chassis dynamometer system during regulation driving cycles. The emission factors of the adopted China VI in-use LDGVs were 7.04 ± 2.61 mg/km under cold-start conditions and 4.94 ± 1.69 mg/km under hot-start conditions. With increasing mileage traveled, the total ammonia emissions increased, and the difference between the cold/hot-start results decreased. The emissions of in-use LDGVs with bi-fuel engines were analyzed, and more ammonia was generated in the compressed natural gas (CNG) mode through the hydrocarbon (HC) reforming reaction. The relationship between the emissions of ammonia and conventional pollutants was established. During the initial cold-start phase, a delay in ammonia formation was observed, and the ammonia emissions conformed with the CO and HC emissions after exhaust heating. Vehicle specific power (VSP) analysis revealed that the interval of highest ammonia emissions corresponded to acceleration events at high speeds. For the HEV, the transition from motor to engine drive conditions contributed to ammonia emission occurrence because of the more pronounced cold-start events. The use of HEV technology could introduce additional uncertainties in controlling urban ammonia emissions. Detailed analysis of emission characteristics could provide data support for future research on ammonia emission standards and control strategies for LDGVs. © 2024 Elsevier B.V.

关键词： Health risks

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Absorption and Transportation of Nano-Biochar by Plants: Implications for environmental Fate and Food Chain Risk

SSRN

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SSRN 2023年

作者： Li, Yuliang Ge, Chenhao Cheng, Cheng Wang, Xiaolei Si, Dunfeng Mu, Chunyi Wang, Min Li, Hongbo Zhou, Dongmei State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China School of Applied Meteorology Nanjing University of Information Science & Technology Nanjing210044 China

Nano-biochar (N-BC) is an emerging nanomaterial with potential applications in various fields. Understanding its behavior in the environment and its interaction with plants is crucial for assessing its ecological implications and potential risks to the food chain. In this study, we investigated the absorption and transportation of N-BC by wheat and Chinese cabbage plants using microscopy techniques and stable isotope analysis. Our results revealed that N-BC particles were readily absorbed by the plants through their root systems and transported to the aboveground tissues. Scanning electron microscopy and transmission electron microscopy provided visual evidence of N-BC particles inside the plants, predominantly located in the xylem and cell walls of the cortical tissue. Stable isotope analysis confirmed the uptake and transportation of N-BC, with elevated isotopic values observed in the plant tissues exposed to 13C-N-BC. Our results demonstrated that around 50.2% - 52.4% of the absorbed N-BC by plants was accumulated in the roots of wheat and Chinese cabbage, and the remaining fraction was transferred to the shoots including steam (31.0% -32.1%) and leaf (16.5% - 17.6%). Importantly, we observed significant accumulation of N-BC in the edible parts of Chinese cabbage, raising concerns about its potential entry into the food chain and associated health risks. These findings highlight the need for further research to explore the specific pathways and modes of N-BC uptake and transport in plants. Monitoring the presence of N-BC in the environment and its potential impact on the food chain is crucial for ensuring food security and safeguarding human health. © 2023, The Authors. All rights reserved.

关键词： Health risks

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Recycling spent lithium-ion batteries using a mechanochemical approach

Circular Economy

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Circular Economy 2022年第2期1卷

作者： Wang, Mengmeng Liu, Kang Yu, Jiadong Zhang, Cong-Cong Zhang, Zhiyuan Tan, Quanyin State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China Department of Solid Waste Treatment and Recycling Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing100085 China Department of Resource and Environment University of Chinese Academy of Sciences Beijing100049 China

Under the goal of global sustainable development, the new energy vehicle industry is evolving rapidly, leading to a proliferation of spent lithium-ion batteries (LIBs). The recycling of LIBs is key to the sustainable development of the new energy industry, which is consistent with the concept of circular economy as well. And the green extraction of critical metals is the core part of the development. As an alternative to traditional pyrometallurgy and hydrometallurgy, emerging mechanochemical technology provides a new approach for high efficiency and green recycling of critical metals from spent LIBs, as it has the advantages of easy operation, flexibility, and short processing time. This article reviews the state of the art of mechanochemical technology in the recycling of critical metals from spent LIBs. Based on numerous practices, a framework including mechanochemical activation, organic reaction, inorganic reaction, redox reaction, gas-solid reaction, and solid-phase synthesis was constructed. These practices have proved that mechanochemical technology can provide a greener and more sustainable solution for recycling critical metals from spent LIBs. The metals can be transformed into high-value metal products at room temperature and under ordinary pressure, leading to efficient recycling of critical metals and significant reduction of wastes. © 2022 The Author(s)

关键词： Sustainable chemistry

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The Start-Up of Red Blood Cell-Like Anammox Granular Sludge Based on Substrate Volume Flux

SSRN

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SSRN 2023年

作者： Wang, Wenqiang Li, Dong Li, Zhu Li, Mingrun Deng, Jiguang Zhang, Jie Key Laboratory of Water Science and Water Environment Recovery Engineering Beijing University of Technology Beijing100123 China Key Laboratory of Beijing on Regional Air Pollution Control Beijing Key Laboratory for Green Catalysis and Separation Department of Chemical Engineering Faculty of Environment and Life Beijing University of Technology Beijing100124 China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology Harbin150090 China

Enhancing substrate transfer is the key to promote the denitrification rate of Anammox granular sludge. The shape of the granular sludge will significantly affect the substrate transfer. In this work, based on the principles of biomimicry, we propose to domesticate a novel red blood cell-like particle to increase the contact area for enhanced substrate transfer. In this study, the start-up and operation of Anammox granular sludge in low-strength ammonia nitrogen wastewater were realized based on the increase of substrate volume flux (SVF). As SVF increased from 2.38 to 7.43 L2/(g VSS · h), specific Anammox activity (SAA) increased from 0.138 to 0.483g N/(g VSS · d). The total nitrogen removal efficiency of the system was 85.70%, and the nitrogen removal rate (NRR) was 0.792 kg N/(m3 · d) on the 126 d. Red blood cell-like granular sludge was found on the 116 d. The increase of SVF induces a granule structure that is more conducive to substrate transport, leading to an increase in the efficiency of granule uptake of substrate, thereby strengthening the SAA of granules. High-throughput pyrosequencing results showed that the dominant bacteria using the SVF-improving strategy were still anaerobic ammonia oxidation bacteria (AnAOB), but the species increased to three, namely Candidatus Kuenenia, Candidatus Anammoxoglobus and Candidatus Brocadia. © 2023, The Authors. All rights reserved.

关键词： Blood

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Region-gridding recycling of bulk organic waste: Emerging views based on coordinated urban and rural development

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Frontiers of environmental Science & Engineering 2020年第6期14卷 1-3页

作者： Wenbing Tan Dongyu Cui Xiaohui Zhang Beidou Xi State Key Laboratory of Environmental Criteria and Risk Assessment and State Environmental Protection Key Laboratory of Simulation and Control of Groundwater PollutionChinese Research Academy of Environmental SciencesBeijing 100012China School of Environment Tsinghua UniversityBeijing 100084China CSD IDEA(Beijing)Environmental Test&Analysis Co. Ltd.Beijing 100192China

Bulk organic waste(BOW)has a large outputin *** improper disposal of BOW will not onlybring serious environmental pollution,but also cause wasteof biomass *** viewpoint proposes a region-gridding recycling management system of BOW thathighlights the coordinated development of environmental,agricultural and energy elements in urban and rural *** viewpoint aims to drive the upstream and downstreamindustrial chains of BOW treatments,avoid the repeatedconstruction of resource facilities,guide the upgrading ofresource-based technologies,promote the professionaliza-tion of farmers,and thus built the high-quality modernagricultural recycling industrial park based on systemmanagement.

关键词： Bulk organic waste Recycling Urban-ruralcoordination Management system

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Hierarchically Porous Carbon Derived from Pore Remodeling of Waste Polymeric Membranes for High-Efficiency Adsorption Applications

SSRN

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SSRN 2022年

作者： Hou, Zhiang Lan, Huachun Zhu, Kai An, Xiaoqiang Liu, Huijuan Qu, Jiuhui Center for Water and Ecology Tsinghua University State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China School of Environmental Science and Engineering Suzhou University of Science and Technology Suzhou215009 China

Herein, the waste-derived carbon (AC-KOH) with multimodal pore structures was successfully synthesized by thermally remodeling the pores of waste hollow fiber membranes collected from sewage-treatment plants. Mechanism study revealed that KOH etching in the original pores of PVDF film leaves micropores, while the development of meso-macropores is induced by PET liner pyrolysis and subsequent re-crosslinking and cyclization surrounding KOH. The synergism of macro-meso-micropores enabled the fast diffusion of molecules from the bulk solution to adsorption sites, thereby AC-KOH exhibited fast adsorption kinetics for removing four types of phenolic pollutants and small dye molecules (molecular weight © 2022, The Authors. All rights reserved.

关键词： Adsorption

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Biological co-reduction of perchlorate and nitrate in wastewater: Insights into the competitive inhibition mechanisms in UASB reactors

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environmental Research 2025年 282卷 121950页

作者： Ma, Xinlei Zhang, Qi Tan, Xinya Lu, Yongze Wang, Hongyang Zhu, Guangcan School of Energy and Environment Southeast University Nanjing210096 China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing100012 China Key Laboratory of Water Safety and Aquatic Ecosystem Health of Xizang Xizang Minzu University Xianyang712082 China Key Laboratory of Water Pollution Control and Ecological Restoration of Xizang National Ethnic Affairs Commission Xizang Minzu University Xianyang712082 China

The pollution caused by wastewater with high perchlorate concentrations should not be underestimated. Efficient biodegradation is a promising treatment method. Nitrate, which often coexists with perchlorate in wastewater, has a great influence on its degradation. Therefore, in-depth studies on the combined degradation mechanisms of perchlorate and nitrate under coexisting conditions are essential. This study developed two heterotrophic up-flow anaerobic sludge blanket (UASB) reactors. In R1, perchlorate was efficiently removed, with a load of 927 ± 7.72 gClO4−/(m3·d), and removal efficiency exceeded 99.4 %. In R2, perchlorate and nitrate were removed simultaneously, with loadings of 927 ± 3.52 gClO4−/(m3·d) and 81 ± 7.25 gNO3−-N/(m3·d), respectively. Removal efficiencies were 95.9 ± 3.24 % for perchlorate and 99.8 ± 0.09 % for nitrate. A modified Monod competition model indicated that nitrate concentration exerts a more significant inhibitory effect at nitrate-to-perchlorate concentration ratios of 1:1 or higher. Batch experiments identified the optimal CH3COO−: ClO4−: NO3−-N molar ratio as 5.4:1:3.6 and the ideal environmental ORP as −200 ± 20 mV for co-removal of perchlorate and nitrate. Metagenomic analysis revealed the dynamics of microbial communities and functional genes associated with perchlorate and nitrate reduction. Nitrate presence regulates the abundance and activity of NapC and cyt c transporter enzymes, which indirectly weaken the perchlorate electron transport pathway and directly affect terminal electron receptor coupling efficiency. This study provided valuable insights for optimizing biological treatment strategies for wastewater contaminated with perchlorate and nitrate. © 2025

关键词： Competitive inhibition Denitrification Kinetic modelling Microbial community dynamics Perchlorate degradation

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中国碳收支:1980~2021年

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Science Bulletin 2024年第1期69卷 114-124页

作者：夏晓圣任培阳王旭辉刘丹陈修治丹利何斌何洪林居为民梁敏琪陆星劼彭静覃章才夏江周郑博魏静乐旭于贵瑞朴世龙袁文平 School of Atmospheric Sciences Guangdong Province Data Center of Terrestrial and Marine Ecosystems Carbon CycleSun Yat-sen UniversityZhuhai 510245China Sino-French Institute for Earth System Science College of Urban and Environmental SciencesPeking UniversityBeijing 100091China State Key Laboratory of Tibetan Plateau Earth System Resources and EnvironmentInstitute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China Key Laboratory of Regional Climate-Environment for Temperate East Asia Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China State Key Laboratory of Earth Surface Processes and Resource Ecology College of Global Change and Earth System ScienceBeijing Normal UniversityBeijing 100875China Synthesis Research Center of China’s Ecosystem Research Network Key Laboratory of Ecosystem Network Observation and ModelingInstitute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China International Institute for Earth System Science Nanjing UniversityNanjing 210023China Tianjin Key Laboratory of Water Resources and Environment Tianjin Normal UniversityTianjin 300387China Institute of Environment and Ecology Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Collaborative Innovation Center of Atmospheric Environment and Equipment TechnologySchool of Environmental Science and EngineeringNanjing University of Information Science&TechnologyNanjing 210044China

As one of the world's largest emitters of greenhouse gases,China has set itself the ambitious goal of achieving carbon peaking and carbon ***,it is crucial to quantify the magnitude and trend of sources and sinks of atmospheric carbon dioxide(CO_(2)),and to monitor China's progress toward these *** state-of-the-art datasets and models,this study comprehensively estimated the anthropogenic CO_(2)emissions from energy,industrial processes and product use,and waste along with natural sources and sinks of CO_(2)for all of China during *** recognize the differences among various methods of estimating greenhouse emissions,the estimates are compared with China's National Greenhouse Gas Inventories(NGHGIs)for 1994,2005,2010,2012,and *** CO_(2)emissions in China have increased by 7.39 times from 1980 to 12.77 Gt CO_(2)a^(-1)in *** benefiting from ecological projects(e.g.,Three Norths Shelter Forest System Project),the land carbon sink in China has reached 1.65 Gt CO_(2)a^(-1)averaged through 2010-2021,which is almost 15.81 times that of the carbon sink in the *** average,China's terrestrial ecosystems offset 14.69%±2.49%of anthropogenic CO_(2)emissions through *** provincial-level administrative regions of China,Xizang and Qinghai,have achieved carbon neutrality according to our estimates,but nearly half of the administrative regions of China have terrestrial carbon sink offsets of less than 10%of anthropogenic CO_(2)*** study indicated a high level of consistency between NGHGIs and various datasets used for estimating fossil CO_(2)emissions,but found notable differences for land carbon *** estimates of the terrestrial carbon sinks of NGHGIs urgently need to be verified with process-based models which integrate the comprehensive carbon cycle processes.

关键词： CO_(2)emission Land carbon sink China Carbon neutrality Carbon budget

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Quantification of microbial community contributions to phosphorus speciation transformation in plateau lake sediments: Evidence from phosphate oxygen isotope fractionation and 16S rRNA gene sequencing

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environmental Technology and Innovation 2025年 39卷

作者： Sang, Yiwen Wang, Ziteng Sun, Fuhong Mao, Aoping Chen, Xiuyuan Chang, Hong Guo, Yiding State Key Laboratory of Environment Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing100012 China Beijing Key Lab for Source Control Technology of Water Pollution College of Environmental Sciences & Engineering Beijing Forestry University Beijing100083 China College of Ecology and Nature Conservation Beijing Forestry University Beijing100083 China

Understanding multiform phosphorus (P) biogeochemical cycling processes is crucial for mitigating eutrophication in aquatic environments. However, research on quantifying the contributions of different microbial genera to P migration and transformation is insufficient. This study aimed to investigate microbe-mediated P cycling processes in the sediments of a typical eutrophic lake, Dianchi, China, using 16S rRNA gene sequencing and phosphate oxygen isotope techniques. The results showed that phyla Proteobacteria, Acidobacteria, Firmicutes, and Chloroflexi were the key microbial communities influencing P cycling processes in the sediments. Phosphate oxygen isotope analysis revealed the potential proportions of external P inputs, with livestock farming (46.3 %) and P mining (30.1 %) identified as the largest contributors. Random forest analysis, used to characterize microbe-mediated fractionation processes of different P forms, revealed that microorganisms most strongly influenced H2O-P and NaHCO3-P, followed by NaOH-P. In contrast, their impact on the more stable HCl-P was minimal. Structural equation modeling was used to quantitatively determine the weight order of key microbial taxa as Actinobacteria > Proteobacteria > Acidobacteria > Ignavibacteriae. Notably, environmental factors (chemical oxygen demand, total nitrogen, and dissolved oxygen) may modulate microbial community composition and metabolism, thereby indirectly regulating P cycling. A significant correlation between most environmental factors and NaHCO3-P was observed. For example, total nitrogen contributed 14 % in NaHCO3-P compared with 1 % in NaOH-P. This study highlights the complex interactions between microbial communities and P cycling in natural environments, providing novel insights into the microbial mechanisms of P cycling and offering a theoretical basis for managing ecological restoration in eutrophic lakes. © 2025

关键词： Eutrophication

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