检索结果-内蒙古大学图书馆

Efficient Metal Recovery from Industrial Wastewater:Potential Oscillation and Turbulence Mode for Electrochemical System

引用

Engineering 2024年第7期38卷 184-193页

作者： Li Chen Gong Zhang Huijuan Liu Shiyu Miao Qingbai Chen Huachun Lan Jiuhui Qu Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution ControlSchool of EnvironmentTsinghua UniversityBeijing 100084China

Efficient metal recovery from industrial wastewater facilitates addressing of the environmental hazards and resource requirements of heavy *** conventional electrodeposition recovery method is hampered by the limitations of interfacial ion transport in charge-transfer reactions,creating challenges for simultaneous rapid and high-quality metal ***,we proposed integrating a transient electric field(TE)and swirling flow(SF)to synchronously enhance bulk mass transfer and promote interfacial ion *** investigated the effects of the operation mode,transient frequency,and flow rate on metal recovery,enabling determination of the optimal operating conditions for rapid and efficient sequential recovery of Cu in TE&SF *** conditions included low and high electric levels of 0 and 4 V,a 50%duty cycle,1 kHz frequency,and 400 L·h^(-1)flow *** kinetic coefficients of TE&SF electrodeposition were 3.5-4.3 and 1.37-1.97 times that of single TE and SF electrodeposition,*** the deposition process under TE and SF conditions confirmed the efficient concurrence of interfacial ion transport and charge transfer under TE and SF synergy,which achieved rapid and highquality metal ***,the combined deposition strategy is considered an effective technique for reducing metal pollution and promoting resource recycling.

关键词： Ion transport Reaction kinetics Transient electric field Swirling flow

来源：评论

学校读者我要写书评

暂无评论

Accurate prediction of air quality response to emissions for effective control policy design

引用

Journal of environmental Sciences 2023年第1期123卷 116-126页

作者： Min Cao Jia Xing Shovan Kumar Sahu Lei Duan Junhua Li State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084China

Designing effective control policy requires accurate quantification of the relationship between the ambient concentrations of O3and PM2.5and the emissions of their ***,the challenge is that precursor reduction does not necessarily lead to decreases in the concentrations of O3and PM2.5,which are formed by multiple precursors under complex physical and chemical processes;this calls for the development of advanced model technologies to provide accurate predictions of the nonlinear responses of air quality to *** from the traditional sensitivity analysis and source apportionment methods,the reduced form models(RFMs)based on chemical transport models(CTMs)are able to quantify air quality responses to emissions more accurately and efficiently with lower computational *** we review recent approaches used in RFMs and compare their structures,advantages and disadvantages,performance and *** general,RFMs are classified into three types including(1)sensitivity-based models,(2)models with simplified chemistry and physical processes,and(3)statistical models,with considerable differences in principles,characteristics and application *** prediction of nonlinear responses by RFMs enables more in-depth analysis,not only in terms of real-time prediction of concentrations and quantification of human exposure,health impacts and economic damage,but also in optimizing control ***,data assimilation and emission inventory inversion based on the nonlinear response of concentrations to emissions can also be greatly beneficial to air pollution control *** future studies,improvement in the performance of CTMs is exceedingly crucial to obtain a more reliable baseline for the prediction of air quality *** of models to determine the air quality response to emissions under varying meteorological conditions is also necessary in the context of future climate changes,which pose great challenges to the qua

关键词： Air pollution Nonlinear response Air quality management Reduced form models(RFMs) Precursor emissions

来源：评论

学校读者我要写书评

暂无评论

Catalytic ozonation in advanced treatment of kitchen wastewater:multi-scale simulation and pilot-scale study

引用

Frontiers of environmental Science & Engineering 2023年第12期17卷 47-58页

作者： Zuoyong Zhou Ni Yan Mengxi Yin Tengfei Ren Shuning Chen Kechao Lu Xiaoxin Cao Xia Huang Xiaoyuan Zhang State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China

Catalytic ozonation is regarded as a promising technology in the advanced treatment of refractory organic ***-bed reactors are widely used in practical applications due to simple structures,installation and ***,mass transfer of packed-bed reactors is relatively restrained and amplified deviations usually occurred in scale-up ***,a multi-scale packed-bed model of catalytic ozonation was established to guide pilot ***,a laboratory-scale test was conducted to obtain kinetic parameters needed for ***,a multi-scale packed-bed model was developed to research the effects of water distribution structure,catalyst particle size,and hydraulic retention time(HRT)on catalytic *** was found that the performance of packed bed reactor was increased with evenly distributed water inlet,HRT of 60 min,and catalyst diameter of about 3-7 ***,an optimized reactor was manufactured and a pilot-scale test was conducted to treat kitchen wastewater using catalytic ozonation *** the pilot-scale test with an ozone dosage of 50 mg/L and HRT of 60 min,the packed-bed reactor filled with catalysts I was able to reduce chemical oxygen demand(COD)from 117 to 59 mg/*** performance of the catalytic ozonation process in the packed-bed reactor for the advanced treatment of actual kitchen wastewater was investigated via both multi-scale simulation and pilot-scale tests in this study,which provided a practical method for optimizing the reactors of treating refractory organic wastewater.

关键词： Catalytic ozonation Multi-scale simulation Pilot-scale study Kitchen wastewater

来源：评论

学校读者我要写书评

暂无评论

Win-Win:Anthropogenic circularity for metal criticality and carbon neutrality

引用

Frontiers of environmental Science & Engineering 2023年第2期17卷 111-122页

作者： Xianlai Zeng State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China

Resource depletion and environmental degradation have fueled a burgeoning discipline of anthropogenic circularity since the *** generally consists of waste reuse,remanufacturing,recycling,and *** economy and“zero-waste”cities are sweeping the globe in their current practices to address the world’s grand concerns linked to resources,the environment,and ***,metal criticality and carbon neutrality,which have become increasingly popular in recent years,denote the material's feature and state,*** goal of this article is to determine how circularity,criticality,and neutrality are *** anthropogenic circularity has the potential to expand the metal supply and,as a result,reduce metal *** barely accomplished 15%of its potential emission reduction by recycling iron,copper,and *** circularity has a lot of room to achieve a win-win objective,which is to reduce metal criticality while also achieving carbon neutrality in a near closed-loop *** barriers or challenges for conducting anthropogenic circularity are deriving from the inadequacy of life-cycle insight governance and the emergence of anthropogenic circularity *** flow analysis and life cycle assessment are the central methodologies to identify the hidden *** processing and smelting,as well as end-of-life management,are indicated as critical priority areas for enhancing anthropogenic circularity.

关键词： Anthropogenic circularity Material flow analysis Criticality Carbon neutrality Solid waste Circular economy

来源：评论

学校读者我要写书评

暂无评论

Evolution of soil DOM during thermal remediation below 100℃:concentration,spectral characteristics and complexation ability

引用

Frontiers of environmental Science & Engineering 2024年第8期18卷 31-41页

作者： Wan Huang Ziren Wan Di Zheng Lifeng Cao Guanghe Li Fang Zhang State Key Joint Laboratory of Environment Simulation and Pollution Control State Environment Protection Key Laboratory of Microorganism Application and Risk ControlSchool of EnvironmentTsinghua UniversityBeijing 100084China National Engineering Laboratory for Site Remediation Technologies Beijing 100015China

The impact of thermal remediation on soil function has drawn increasing *** far,as the most active fraction of soil organic matter,the evolution of dissolved organic matter(DOM)during the thermal remediation lacks in-depth investigation,especially for the temperatures value below 100℃.In this study,a series of soil thermal treatment experiments was conducted at 30,60,and 90℃ during a 90-d period,where soil DOM concentration increased with heating temperature and *** molecular weight,functional groups content and aromaticity of DOM all decreased during the thermal *** excitation-emission matrices(EEM)results suggested that humic acid-like substances transformed into fulvic acid-like substances(FIII/FV increased from 0.27 to 0.44)during the heating process,and five DOM components were further identified by *** change of DOM structures and components indicated the decline of DOM stability and hydrophilicity,and can potentially change the bioavailability and *** temperature also resulted in the decline of DOM complexation ability,which may be caused by the loss of binding sites due to the decrease of polar function groups,aromatic structures and hydrophilic *** study provides valuable information about the evolution of DOM during thermal remediation,which would potentially change the fate of metal ions and the effectiveness of the post-treatment technologies in the treated region.

关键词： Thermal remediation below 100℃ Heating temperature Soil DOM concentration DOM spectral characteristics Excitation-emission matrices(EEM) Complexation ability

来源：评论

学校读者我要写书评

暂无评论

Regional transport characteristics of PM2.5 pollution events in Beijing during 2018–2021

引用

Journal of environmental Sciences 2025年第6期152卷 503-515页

作者： Dejia Yin Qian Song Yuanxi Guo Yueqi Jiang Zhaoxin Dong Bin Zhao Shuxiao Wang Da Gao Xing Chang Haotian Zheng Shengyue Li Yunting Li Baoxian Liu State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084China Beijing Key Laboratory of Airborne Particulate Matter Monitoring Technology Beijing 100048China Beijing Municipal Ecological and Environmental Monitoring Center Beijing 100048China Laboratory of Transport Pollution Control and Monitoring Technology Transport Planning and Research InstituteMinistry of TransportBeijing 100028China

Although air pollutant emissions have sharply reduced in recent years,the occurrence of PM_(2.5) pollution events remains an intractable environmental problem in Beijing,and regional transport is the key influence ***,it has been difficult to identify regional transport characteristics and the main contributors to pollution events in recent *** this study,the relative contribution of regional transport was quantified(61.3%)in PM_(2.5) pollution events during 2018-2021 by the Community Multiscale Air Quality model embedded with the Integrated Source Apportionment Model(CMAQ-ISAM).The four regions with the largest fractional contributions to Beijing for all events were Shandong(7.7%),South Hebei(7.3%),Baoding(6.2%),and Langfang(5.8%).pollution events were classified into the following types based on regional transport directions:local,southwest(SW),southeast(SE),south-mixed(SM),and *** on the transport distance,the SW,SE,and SM types can be subdivided into SW-short,SW-long,SE-short,SE-long,SM-short,SM-long distance from southwest,SM-long distance from southeast,and SM-long distance from southwest and ***-long was regarded as the most important type,with the highest relative frequency(20%).The transport directions were related to the southwest wind at 925 hPa and southeast wind at 1000 hPa in the south of the Beijing–Tianjin–Hebei(BTH)region,and the distance was mainly controlled by wind *** wind-field difference can be attributed to the low-pressure and high-pressure systems that control the BTH *** results suggest that regional joint pollution control should be optimized based on the transport type.

关键词： PM2.5 pollution events Regional transport CMAQ-ISAM

来源：评论

学校读者我要写书评

暂无评论

Feasibility study of a process for the reduction of sulfur oxides in flue gas of fluid catalytic cracking unit using the riser reactor

引用

Petroleum Science 2025年第2期22卷 909-924页

作者： Fa-Lu Dang Gang Wang Jing-Cun Lian Yu Yang Mei-Jia Liu State Key Laboratory of Heavy Oil Processing College of Chemical Engineering and EnvironmentChina University of PetroleumBeijing102249China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing100084China

In this work,a new process for achieving the recovery of elemental sulfur by utilizing a fluidized catalytic cracking(FCC) riser reactor for SOxtreatment(FCC-DeSOx) is *** process leverages the high temperatures and hydrocarbon concentrations in the FCC riser reactor to convert SOxinto H_(2)***,H_(2)S,along with the cracked gas,is processed downstream to produce *** analysis of the key reduction reactions in the FCC-DeSOxprocess revealed that complete conversion of SOxto H_(2)S is feasible in the dry gas(hydrogen-rich) prelift zone,as well as the upper and lower zones of the riser,upon achieving thermodynamic *** studies were conducted to replicate the conditions of these reaction zones using a low concentration of hydrogen gas as the reducing *** process optimization,investigation of the minimum reaction time,and kinetic studies,the potential of this method for the complete reduction of SOxwas further confirmed.

关键词： Sulfur oxides New catalytic cracking process Thermodynamic analysis Kinetic analysis Sulfur recovery

来源：评论

学校读者我要写书评

暂无评论

Chemodiversity of soil dissolved organic matter affected by contrasting microplastics from different types of polymers

引用

Frontiers of environmental Science & Engineering 2023年第12期17卷 149-162页

作者： Hong Yu Beidou Xi Lingling Shi Wenbing Tan 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

Chemodiversity of dissolved organic matter(DOM)is a crucial factor controlling soil nutrient availability,greenhouse gas emissions,and pollutant ***(MPs)are widespread pollutants in terrestrial ecosystems in many ***,the effects of MPs on DOM chemodiversity are not sufficiently understood,particularly under different types of *** UV-Vis spectroscopy,3D fluorescence spectroscopy,and Fourier-transform ion cyclotron resonance mass spectrometry,the effects of three prevalent MPs[polyethylene,polystyrene,and polyvinyl chloride(PVC)]on the chemical properties and composition of soil DOM were investigated via a 310-d soil incubation *** results showed that MPs reduced the aromatic and hydrophobic soil DOM components by more than 20%,with PVC MPs having the greatest ***,as MP contents increase,the humification level of soil DOM significantly *** increased DOM molecules with no heteroatom by 8.3%-14.0%,but decreased DOM molecules with nitrogen content by 17.0%-47.8%.This may be because MPs cause positive“priming effect,”resulting in the breakdown of bioavailable components in soil *** is also related to MPs changing microbial richness and diversity and enriching microbial communities involved in lignin compositions *** the presence of MPs,soil DOM chemodiversity depended on soil pH,electrical conductivity,dissolved organic carbon,soil organic matter,bacterial Shannon,and fungal Chao ***,DOM in MP-contaminated soils featured more lipids and less condensed aromatics and proteins/amino sugars,thereby conferring a lower DOM aromaticity and higher lability.

关键词： Microplastics Dissolved organic matter FT-ICR MS Chemodiversity Molecular signature

来源：评论

学校读者我要写书评

暂无评论

Real-world identification of high-emitting vehicles based on near-road sensor measurement

引用

Frontiers of environmental Science & Engineering 2025年第5期19卷 81-96页

作者： Bo Li Dongbin Wang Qiang Zhang Leqi Shi Mingliang Fu Hang Yin Jingkun Jiang State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China Vehicle Emission Control Center Chinese Research Academy of Environmental SciencesBeijing 100012China

A small fraction of high-emitting vehicles make disproportionally large contributions to total fleet *** identifying high emitters under real driving conditions is *** this study,two portable sensor platforms for high-emitter identification were used for online roadside measurements of vehicle-emitted NO,particle number(PN),and CO_(2) concentrations in Tangshan and Chengdu,*** measured mean concentrations of vehicle-emitted NO,PN,and CO_(2) in Tangshan and Chengdu were 27.7-32.9 ppb,5.4×10^(3)-8.2×10^(3)#/cm^(3),and 7.3-8.2 ppm,*** on more than one month of second-by-second measured pollutant concentrations and passed vehicle information,a scheme was developed to identify high *** the 217000 and 43000 vehicles that passed the roadside sensor platforms at Tangshan and Chengdu,approximately 60%and 73%of vehicle exhaust plumes were successfully detected using the sensor *** NO and PN emission factors(EFs)tended to have log-normal distributions with the median values of 14.3 g/kg-fuel and 1.3×10^(15)#/kg-fuel,*** general,the percentages of high-emitters identified at the Tangshan and Chengdu sites were 8.7% and 12.2% of the total identified vehicles,*** these high-emitters,122 vehicles were randomly inspected on-site with the assistance of traffic officers,and the rate of correct identification was approximately 95%,which demonstrates that our methodology performs well in identifying real-world ***,its low cost,good mobility,strong adaptability,and high correct identification rate make this roadside sensor platform a promising approach for real-world high-emitter identification.

关键词： Real world High-emitter identification Roadside sensor measurement Nitrogen oxide Particle number

来源：评论

学校读者我要写书评

暂无评论

A probe into the acid deposition mitigation path in China over the last four decades and beyond

引用

National Science Review 2024年第4期11卷 84-92页

作者： Qian Yu Xiaodong Ge Haotian Zheng Jia Xing Lei Duan Dongwei Lv Dian Ding Zhaoxin Dong Yisheng Sun Posch Maximilian Danni Xie Yu Zhao Bin Zhao Shuxiao Wang Jan Mulder Thorj?rn Larssen Jiming Hao State Key Laboratory of Environmental Simulation and Pollution Control School of EnvironmentTsinghua University State Key Laboratory of Pollution Control &Resource Reuse and School of the Environment Nanjing University State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex School of EnvironmentTsinghua University International Institute for Applied System Analysis(IIASA) School of Land Engineering Chang'an University Faculty of Environmental Sciences and Natural Resource Management Norwegian University of Life Sciences Norwegian Institute for Water Research

China currently has the highest acid deposition globally, yet research on its status, impacts, causes and controls is lacking. Here, we compiled data and calculated critical loads regarding acid deposition. The results showed that the abatement measures in China have achieved a sharp decline in the emissions of acidifying pollutants and a continuous recovery of precipitation p H, despite the drastic growth in the economy and energy consumption. However, the risk of ecological acidification and eutrophication showed no significant decrease. With similar emission reductions, the decline in areas at risk of acidification in China(7.0%) lags behind those in Europe(20%) or the USA(15%). This was because, unlike Europe and the USA, China's abatement strategies primarily target air quality improvement rather than mitigating ecological impacts. Given that the area with the risk of eutrophication induced by nitrogen deposition remained at 13%of the country even under the scenario of achieving the dual targets of air quality and carbon dioxide mitigation in 2035, we explored an enhanced ammonia abatement pathway. With a further 27% reduction in ammonia by 2035, China could largely eliminate the impacts of acid deposition. This research serves as a valuable reference for China's future acid deposition control and for other nations facing similar challenges.

关键词： acid deposition critical loads acidification eutrophication ammonia abatement

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：