检索结果-内蒙古大学图书馆

Significant changes in the physicochemical properties of BC-containing particles during the cold season in Beijing

Journal of environmental Sciences 2025年第5期151卷 667-676页

作者： Shuya Hu Linghan Zeng Gang Zhao Shiyi Chen Chunsheng Zhao Weilun Zhao Min Hu State Key Joint Laboratory of Environmental Simulation and Pollution Control International Joint Research Center for Atmospheric Research(IJRC)College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China Department of Atmospheric and Oceanic Sciences School of PhysicsPeking UniversityBeijing 100871China Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Nanjing University of Information Science and TechnologyNanjing 210044China

The ambient air quality has improved significantly under strict emission controls in Beijing,China over the last *** carbon(BC),as a short-lived climate forcer in ambient aerosols,profoundly impacts the air quality and *** studies have demonstrated a decline in the mass concentration of *** this study,we characterized the chemical compositions and size distributions of BC-containing particles during the cold season of 2022 in Beijing using {1.-of-the-art instruments capable of exclusively measuring BCcontaining *** optical properties of BC-containing particles were further calculated based on the Mie ***,we compared the properties of BC-containing particles in 2022 with the results of previous *** results showed that the diameters of BC cores became larger while the coating thickness of BC-containing particles became thinner in *** the coating materials,the mass fraction of nitrate increased obviously,and even replaced organic matter as the dominant component during the peak of the pollution *** in chemical compositions and size distributions resulted in lower mass absorption cross-sections(MAC)of BC-containing particles from 1..5±1.1.m^(2)/g in 201. to 7.3±0.8 m^(2)/g in 2022,reduced by 30.5%.Our results demonstrate the synergistic benefits of air pollution control in improving air quality and mitigating climate ***,the MAC of BC adopted in climate models should vary with the changing air pollution *** study emphasizes that it is imperative to conduct long-term observations of BC-containing particles to better estimate BC’s climate effects.

关键词： Black carbon Chemical composition Size distribution Light absorption ability

来源：评论

学校读者我要写书评

暂无评论

Enhanced removal of phosphonates from aqueous solution using PMS/UV/hydrated zirconium oxide process

引用

Chinese Chemical Letters 2023年第4期34卷 384-389页

作者： Shunlong Pan Xi Nie Xinrui Guo Hao Hu Biming Liu Yongjun Zhang School of Environmental Science and Engineering Nanjing Tech UniversityNanjing 210009China College of Environment Hohai UniversityNanjing 210098China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China

Traditional treatment processes cannot completely remove phosphonates in circulating cooling water by one-step method. Herein, we designed peroxymonosulfate/UV irradiation/hydrated zirconium oxide(PMS/UV/HZO) coupling process to enhance the phosphonates removal. In particular, nitrilotrismethylenephosphonic acid(NTMP) removal efficiency by PMS/UV/HZO process was much higher than that of PMS/UV process, UV/HZO process and other processes in comparison experiments. Specifically,almost 97.2% NTMP in water was degraded, and the total phosphorous(TP) reduced from 9.3 mg/L to 0.26 mg/L at pH 7 within 1.0 min. TP removal efficiency still reached above 90% after 5 cycles adsorptiondesorption of HZO. Moreover, Cl^(-), NO_(3)-and SO_(4)^(2-)ions all had negligible effect on NTMP removal. During the process, NTMP was first destroyed to form phosphates and other intermediates by the reactive oxygen species(ROS), then phosphates were in situ immobilized via HZO adsorption. Sulfate radical(SO_(4)^(·-))has been confirmed to be the major ROS in the reaction system by quenching experiment and electron paramagnetic resonance(EPR) characterization. And the excellent selective adsorption capacity of HZO for phosphate produced was attributed to the strong inner-sphere coordination between H_(2)PO_(4)-/HPO_(4)^(2-)and Zr-OH on the surface of HZO. These results suggest that PMS/UV/HZO process is a promising technique for enhanced phosphonates decontamination.

关键词： Phosphonates Peroxymonosulfate UV ROS Adsorption

来源：评论

学校读者我要写书评

暂无评论

Formaldehyde oxidation on Pd/USY catalysts at room temperature: The effect of acid pretreatment on supports

引用

Journal of environmental Sciences 2023年第3期125卷 811-822页

作者： Xiaofeng Liu Chunying Wang Yumin Chen Qi Qin Yaobin Li Hong He Center for Excellence in Regional Atmospheric Environment Key Laboratory of Urban Pollutant ConversionChinese Academy of SciencesInstitute of Urban EnvironmentXiamen 361021China University of Chinese Academy of Sciences Beijing 100049China Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control Chinese Academy of SciencesNingbo Urban Environment Observation and Research Station-NUEORSNingbo 315800China State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-environmental SciencesChinese Academy of SciencesBeijing 100085China Xiamen Key Laboratory of Materials for Gaseous Pollutant Control Chinese Academy of SciencesInstitute of Urban EnvironmentXiamen 361021China

The complete catalytic oxidation of formaldehyde (HCHO) to CO_(2)and H_(2)O at room temperature is a green route for indoor HCHO *** is an excellent carrier material for HCHO oxidation due to its large surface area,intricate pores and high adsorption ***,the zeolite-supported noble metal catalysts have currently shown relatively low activity especially at room *** this work,we present a facile acid treatment strategy for zeolite catalysts to improve the hydroxyl concentration and further enhance their catalytic activity for HCHO *** tests illustrated that HCHO could be completely oxidized to CO_(2)and H_(2)O at a nearly 1.0%conversion rate with a weight hourly space velocity (WHSV) of 1.0,000 mL/(g·hr) at 25℃,when the support of Pd/USY catalysts was pretreated by hydrochloric acid with a concentration of 0.20 mol/*** characterization results revealed that the active hydroxyl groups originated from the dealumination in the acid treatment play a key role in the HCHO oxidation *** deduced reaction mechanism suggests that bridging hydroxyl groups may oxidize HCHO to dioxymethylene(DOM) species and terminal hydroxyl groups are responsible for the transformation of DOM groups to formate (HCOO) species.

关键词： Formaldehyde oxidation USY zeolite Acid treatment Hydroxyl groups

来源：评论

学校读者我要写书评

暂无评论

Atmospheric Radical Chemistry Evolution: A Chemical Scan of the Atmosphere

ACS ES&T Air

引用

ACS ES&T Air 2024年第11期1卷 1329-1332页

作者： Keding Lu Zhaofeng Tan State Environmental Protection Key Laboratory of Atmospheric Ozone Pollution Control State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and Engineering Peking University Beijing 100871 China

来源：评论

学校读者我要写书评

暂无评论

Evaluation of the technoeconomic feasibility of electrochemical hydrogen peroxide production for decentralized water treatment

引用

Frontiers of environmental Science & Engineering 2021年第1期15卷 31-45页

作者： Yang Li Yixin Zhang Guangshen Xia Juhong Zhan Gang Yu Yujue Wang School of Environment State Key Joint Laboratory of Environmental Simulation and Pollution ControlBeijing Key Laboratory for Emerging Organic Contaminants ControlTsinghua UniversityBeijing 100084China

This study evaluated the feasibility of electrochemical hydrogen peroxide(H2O2)production with gas diffusion electrode(GDE)for decentralized water *** black-polytetrafluoroethylene GDEs were prepared and tested in a continuous flow electrochemical cell for H2O2 production from oxygen *** showed that because of the effective oxygen transfer in GDEs,the electrode maintained high apparent current efficiencies(ACEs,>80%)for H_(2)O_(2) production over a wide current density range of 5–400 mA/cm^(2),and H_(2)O_(2) production rates as high as~202 mg/h/cm^(2) could be ***-term stability test showed that the GDE maintained high ACEs(>85%)and low energy consumption(<1. kWh/kg H2O2)for H_(2)O_(2) production for 42 d(~1.00 h).However,the ACEs then decreased to~70%in the following 4 days because water flooding of GDE pores considerably impeded oxygen transport at the late stage of the *** on an electrode lifetime of 46 days,the overall cost for H2O2 production was estimated to be~0.88$/kg H_(2)O_(2),including an electricity cost of 0.61./kg and an electrode capital cost of 0.27$/*** a 9 cm^(2) GDE and 40 mA/cm^(2) current density,~2–4 mg/L of H2O2 could be produced on site for the electro-peroxone treatment of a 1.2 m^(3)/d groundwater flow,which considerably enhanced ibuprofen abatement compared with ozonation alone(~43%–59%vs.7%).These findings suggest that electrochemical H_(2)O_(2) production with GDEs holds great promise for the development of compact treatment technologies for decentralized water treatment at a household and community level.

关键词： Advanced oxidation process Electro-peroxone Gas diffusion electrode Hydrogen peroxide Oxygen reduction

来源：评论

学校读者我要写书评

暂无评论

SARS-CoV-2 aerosol transmission and detection

引用

Eco-Environment & Health 2022年第1期1卷 3-10页

作者： Maosheng Yao State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China

Aerosol transmission has been officially recognized by the world health authority resulting from its overwhelming experimental and epidemiological *** substantial progress,few additional actions were taken to prevent aerosol transmission,and many key scientific questions still await urgent *** grand challenge,the effective {1. of aerosol transmission of COVID-1.,remains unsolved.A better understanding of the viral shedding into the air has been developed,but its temporal pattern is largely *** tools,as one of the critical elements for studying SARS-CoV-2 aerosol,are not readily available around the *** of them are less capable of preserving the viability of SARS-CoV-2,thus offering no clues about viral aerosol *** evidenced,the viability of SARS-CoV-2 is also directly impacted by temperature,humidity,sunlight,and air *** SARS-CoV-2 aerosol detection,liquid samplers,together with real-time polymerase chain reaction(RT-PCR),are currently used in certain enclosed or semi-enclosed *** and rapid COVID-1. screening technologies are in great *** others,the breath-borne-based method emerges with global attention due to its advantages in sample collection and early disease *** collectively confront these challenges,scientists from different fields around the world need to fight together for the welfare of *** review summarized the current understanding of the aerosol transmission of SARS-CoV-2 and identified the key knowledge gaps with a to-do *** review also serves as a call for efforts to develop technologies to better protect the people in a forthcoming reopening world.

关键词： Aerosol transmission SARS-CoV-2 Exhaled breath Aerosol detection

来源：评论

学校读者我要写书评

暂无评论

An innovative method based on Gaussian cloud distribution and sample information richness for eutrophication assessment of Yangtze’s lakes and reservoirs under uncertainty

引用

environmental Science and {1. Research 2024年第22期31卷 32784-32799页

作者： Zang, Nan Cao, Guozhi Xu, Yanxue Feng, Yu Xu, Zesheng Zhou, Xiafei Liao, Yunjie China National Environmental Monitoring Centre Beijing100012 China Chinese Academy for Environmental Planning Beijing100043 China Sinosoft Company Limited Beijing100089 China Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China

The precise assessment of a water body’s eutrophication status is essential for making informed decisions in water environment management. However, conventional approaches frequently fail to consider the randomness, fuzziness, and inherent hidden information of water quality indicators. These would result in an unreliable assessment. An enhanced method was proposed for the eutrophication assessment under uncertainty in this study. The multi-dimension gaussian cloud distribution was introduced to capture the randomness and fuzziness. The Shannon entropy based on various sample size and trophic levels was proposed to maximize valuable information hidden in the datasets. Twenty-seven significant lakes and reservoirs located in the Yangtze River Basin were selected to demonstrate the proposed method. The sensitivity and consistency were used to evaluate the accuracy of the proposed method. Results indicate that the proposed method has the capability to effectively assess the eutrophication status of lakes and reservoirs under uncertainty and that it has a better sensitivity since it can identify more than 33–50% trophic levels compared to the traditional methods. Further scenario experiments analysis revealed that the sample information richness, i.e., sample size and the number of trophic levels is of great significance to the accuracy/robustness of the method. Moreover, a sample size of 60 can offer the most favorable balance between accuracy/robustness and the monitoring expenses. These findings are crucial to optimizing the eutrophication assessment. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Eutrophication

来源：评论

学校读者我要写书评

暂无评论

Technical alternatives for coke oven gas utilization in China: A comparative analysis of environment-economic-strategic perspectives

引用

environmental Science and Ecotechnology 2024年第5期21卷 168-177页

作者： Zichen Di Feixia Lei Jiankai Jing Hao Peng Xi Lu Fangqin Cheng Institute of Resources and Environmental Engineering Shanxi UniversityTaiyuan030006PR China School of Environment State Key Joint Laboratory of Environment Simulation and Pollution ControlTsinghua UniversityBeijing100084PR China Institute for Carbon Neutrality Tsinghua UniversityBeijing100084PR China

China is the largest coke producer and *** is a pressing need to address the high emissions of air pollutants and carbon dioxide associated with traditional coking *** the nation pursues a transition towards carbon neutrality,expanding supply chains for coking plants to produce hydrogen,methanol,and other green alternatives has garnered significant ***,the relative advantages of these strategies have remained *** this study,we integrate a life cycle assessmenteconomic analysis-scenario analysis model to evaluate various coke oven gas(COG)utilization routes(COGtM:COG-to-methanol,COGtLNG:COG-to-liquefied natural gas,COGtSA:COG-to-synthetic ammonia,and COGtH:COG-to-hydrogen).The results indicate that COGtSA emerges as the preferred option for balancing environmental and economic ***,COGtM demonstrates economic viability but is associated with higher environmental *** being recognized as a significant strategic direction under carbon neutrality initiatives,COGtH faces economic feasibility and risk resilience *** encounters both financial and environmental challenges,necessitating strategic development from an energy security *** projected coking capacity is anticipated to experience a slight increase in the mid-term yet a significant decline in the long term,influenced by steel production *** potential future markets,COGtM is estimated to potentially capture a maximum market share of 1.e34%in the methanol ***,against the backdrop of continuously expanding potential demand for hydrogen,COGtH holds advantages as a transitional solution,but in the long run,it can only meet a small portion of the *** can meet 7e1.%of market demand and emerges as the most viable pathway from the viewpoint of balancing environmental and economic aspects and covering future markets.

关键词： Coke oven gas Life cycle assessment Economic analysis Comprehensive benefits Transformation strategy

来源：评论

学校读者我要写书评

暂无评论

Transport, transformation, and ecological impacts of brominated flame retardants in soils: A comprehensive review

引用

environmental Chemistry and Ecotoxicology 2025年 7卷 1142-1157页

作者： Zhang, Jia Li, Dan Yuan, Ying Hui, Kunlong Tan, Wenbing 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

Brominated flame retardants (BFRs) have become significant contaminants of emerging concern (CECs), resulting in detrimental effects on soil health, human health, and ecosystem sustainability. Their environmental impacts have spurred extensive research into environmental chemistry and ecotoxicology. Despite the widespread detection of both BFRs and Novel Brominated Flame Retardants (NBFRs) in soils, there are few assessments of the environmental behavior and fate of the BFRs. Therefore, this review comprehensively identifies the sources, distribution, transport, transformation, ecotoxicological effects, and remediation strategies of BFRs in soils. Principal findings indicate that adsorption-desorption, mostly influenced by soil organic matter, controls the mobility and transformation of BFRs. Photolysis dominates surface soils, while aerobic and anaerobic biodegradation predominate in subsurface layers. The main factors influencing the bioavailability of BFRs are shed light on in this review. These factors such as the physicochemical properties of BFRs, soil characteristics, and combined pollution are specifically discussed. Moreover, the development, physiological, and biochemical responses of soil organisms to exposure to the BFRs are summarized. Single strategies for addressing BFRs have certain limitations. Urgent actions are needed to focus on environmental behavior and remediation strategies under the "One Health" framework to enrich research gap areas of BFRs, NBFRs, and transformation products. © 2024

关键词： Soil pollution

来源：评论

学校读者我要写书评

暂无评论

Effects of Br−on NDMA Formation During Chloramination:a Review of Influencing Factors,Mechanisms,and control

引用

Chemical Research in Chinese Universities 2023年第3期39卷 370-377页

作者： XIA Ruanjunjie LIAO Xiaobin LIU Tianze GAO Menglan CHEN Chao Institute of Municipal and Environmental Engineering College of Civil EngineeringHuaqiao UniversityXiamen361021P.R.China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing100084P.R.China

For the invasion of seawater and the stress of human activities,bromide ion(Br−)exists widely in drinking water sources,and it was found to influence the formation of non-brominated but carcinogenic nitrogen-containing disinfection by-product nitroso-dimethylamine(NDMA)during chloramination(NH2Cl).The presence of Br−leads to the formation of bromine-active species,such as bromamines(NH2Br),bromochloramine(NHClBr),as well as hypobromous acid(HOBr),which are more reactive with NDMA precursors than chlorine-active species,so might promote NDMA *** review mainly focuses on the influencing laws,as well as the factors(disinfection conditions and characteristics of water matrixes)that affected NMDA formation during chloramination with Br−.In addition,the possible influencing pathways are ***,based on the above summary,measures pertaining to reduce the impact of Br−on NDMA production are *** review would provide a theoretical reference for drinking water treatment plants to deal with bromine-containing water during chloramination.

关键词： Bromide ion Disinfection by-product Nitrosodimethylamine(NDMA) Chloramination

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：