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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2018年第1期19卷 68-79页

作者： Cheng-hang ZHENG Li WANG Yong-xin ZHANG Wei-guo WENG Hai-tao ZHAO Jin-song ZHOU Xiang GAO State Key Laboratory of Clean Energy Utilization State Environmental Protection Center for Coal-fired Air Pollution ControlZhejiang University

目的:燃煤过程中释放的痕量重金属迁移到大气中会对人体造成很大的危害。除尘器在脱除颗粒物的同时可以协同脱除重金属,研究超低排放除尘器对重金属的控制作用效果和影响因素,可以得到提升脱除重金属效率的手段和方法,利于实现燃煤电厂... 详细信息

目的:燃煤过程中释放的痕量重金属迁移到大气中会对人体造成很大的危害。除尘器在脱除颗粒物的同时可以协同脱除重金属,研究超低排放除尘器对重金属的控制作用效果和影响因素,可以得到提升脱除重金属效率的手段和方法,利于实现燃煤电厂重金属的超低排放。方法:1.通过测试方法检测出重金属在煤、飞灰和底灰当中的绝对含量;2.通过分析重金属在飞灰和底灰中占总输入量的比例,得到三种类型除尘器对重金属的脱除效果;3.通过皮尔森相关性系数和灰色关联模型分析各影响因素对重金属在飞灰当中富集的影响作用大小。结论:1.低温电除尘器和电袋除尘器对于汞、砷和硒的脱除效果明显大于常规电除尘器;2.电除尘器的入口烟气温度越低,汞、砷和硒在除尘器中的脱除效果越好;3.煤中的硫含量对重金属在飞灰当中的吸附作用影响明显,其含量越高越不利于重金属的吸附;4.与其他影响因素相比,飞灰当中的铁氧化物和钙氧化物对重金属在飞灰当中吸附的促进作用较为有限。

关键词：超低排放除尘器重金属影响因素

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A land use regression model incorporating data on industrial point source pollution

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Journal of environmental Sciences 2012年第7期24卷 1251-1258页

作者： Li Chen Yuming Wang Peiwu Li Yaqin Ji Shaofei Kong Zhiyong Li Zhipeng Bai College of Urban and Environmental Science Tianjin normal UniversityTianjin 300387China College of Environmental Science and Engineering Nankai UniversityTianjin 300071China State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution and Control Tianjin 300071China Chinese Research Academy of Environmental Sciences Beijing 100012China

Advancing the understanding of the spatial aspects of air pollution in the city regional environment is an area where improved methods can be of great benefit to exposure assessment and policy support. We created land use regression （LUR） models for SO2, NO2 and PMI0 for Tianjin, China. Traffic volumes, road networks, land use data, population density, meteorological conditions, physical conditions and satellite-derived greenness, brightness and wetness were used for predicting SOa, NO2 and PMt0 concentrations. We incorporated data on industrial point sources to improve LUR model performance. In order to consider the impact of different sources, we calculated the PSIndex, LSIndex and area of different land use types （agricultural land, industrial land, commercial land, residential land, green space and water area） within different buffer radii （1 to 20 kin）. This method makes up for the lack of consideration of source impact based on the LUR model. Remote sensing-derived variables were significantly correlated with gaseous pollutant concentrations such as SO2 and NO2. R2 values of the multiple linear regression equations for SO2, NO2 and PM10 were 0.78, 0.89 and 0.84, respectively, and the RMSE values were 0.32, 0.18 and 0.21, respectively. Model predictions at validation monitoring sites went well with predictions generally within 15% of measured values. Compared to the relationship between dependent variables and simple variables （such as traffic variables or meteorological condition variables）, the relationship between dependent variables and integrated variables was more consistent with a linear relationship. Such integration has a discernable influence on both the overall model prediction and health effects assessment on the spatial distribution of air pollution in the city region.

关键词： land use regression air pollution Tianjin point source GIS

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Self-feedback LSTM regression model for real-time particle source apportionment

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Journal of environmental Sciences 2022年第4期34卷 10-20页

作者： Wei Wang Weiman Xu Shuai Deng Yimeng Chai Ruoyu Ma Guoliang Shi Bo Xu Mei Li Yue Li Trusted AI System Laboratory College of Computer ScienceNankai UniversityTianjin 300350China KLMDASR Tianjin Key Laboratory of Network and Data Security TechnologyTianjin 300350China State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control College of Environmental Science and EngineeringNankai UniversityTianjin 300071China Institute of Mass Spectrometry and Atmospheric Environment Guangdong Provincial Engineering Research Center for on-line source apportionment system of air pollution Jinan UniversityGuangzhou 510632China Guangdong-Hongkong-Macao Joint Laboratory of Collaborative Innovation for Environmental Quality Guangzhou 510632China

Atmospheric particulate matter pollution has attracted much wider attention *** recent years,the development of atmospheric particle collection techniques has put forwards new demands on the real-time source apportionments *** demands are summarized,in this paper,as how to set up new restraints in apportionment and how to develop a non-linear regression model to process complicated circumstances,such as the existence of secondary source and similar *** this study,we firstly analyze the possible and potential restraints in single particle source apportionment,then propose a novel three-step self-feedback long short-term memory(SF-LSTM)network for approximating the source *** proposed deep learning neural network includes three modules,as generation,scoring and refining,and regeneration *** from the scoring modules,SF-LSTM implants four loss functions representing four restraints to be followed in the apportionment,meanwhile,the regeneration module calculates the source contribution in a non-linear *** results show that the model outperforms the conventional regression methods in the overall performance of the four evaluation indicators(residual sum of squares,stability,sparsity,negativity)for the ***,in short time-resolution analyzing,SF-LSTM provides better results under the restraint of stability.

关键词： Time series Regression Self-feedback LSTM network Particle source apportionment

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Biomass-Burning Contributions to Rainwater and Aerosol Constituents May Be Systematically Overestimated in Urban China

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Journal of Geophysical Research: Atmospheres 2025年第10期130卷

作者： Yunhua Chang Lin Cheng Michihiro Mochida Ru-Jin Huang Cheng Huang Moritz F. Lehmann Yale-NUIST Center on Atmospheric Environment Nanjing University of Information Science & Technology Nanjing China Institute for Space-Earth Environmental Research Nagoya University Nagoya Japan Key Laboratory of Aerosol Chemistry and Physics State Key Laboratory of Loess and Quaternary Geology Institute of Earth and Environment Chinese Academy of Sciences Xi'an China State Environmental Protection Key Laboratory of Formation and Prevention of Urban Air Pollution Complex Shanghai Academy of Environmental Sciences Shanghai China Shanghai Environmental Monitoring Center Shanghai China Department of Environmental Sciences University of Basel Basel Switzerland

Potassium (both water-soluble K + and elemental K) and levoglucosan (LG) are commonly used as chemical markers for emissions from biomass burning (BB). However, their application in complex urban environments, particularly in coal-dominated regions, may be compromised by overlapping sources and atmospheric processes. Using a decade-long data set (2005–2015) of rainwater chemistry and high-resolution aerosol measurements (2018–2019) in Shanghai, China's largest megacity, this study quantitatively assesses the impacts of coal combustion on potassium and LG levels. Our analysis reveals that over 80% of K + in rainwater and ∼53% of aerosol potassium originate from coal combustion as indicated by strong correlations with industrial SO 2 emissions ( r 2 = 0.80–0.95). Similarly, LG concentrations are significantly impacted by coal combustion with molecular diagnostic ratios aligning with coal-derived endmembers particularly during autumn. Considering the prevalence of coal-based energy systems in most Chinese cities, we argue that pollution attributed to BB in rainwater and aerosol across urban China may be systematically overestimated when relying on currently broadly used BB tracers. By integrating long-term observational data with receptor modeling, we further underscores the necessity of refining source attribution methodologies to better distinguish between BB and coal combustion impacts on air quality and climate in urban areas. Comprehensive data reveal coal combustion as the primary source of potassium in urban China's rainwater and aerosols Levoglucosan is deemed unreliable as a biomass-burning proxy due to significant interference from other sources and processes Accurate pollution source identification methods are needed to distinguish between coal combustion and biomass burning in urban environments Biomass burning (BB), encompassing agricultural burning and forest fires, constitutes a significant contributor to air pollution, affecting human health, air qualit

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Low-condensation diesel use contributes to winter haze in cold regions of China

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environmental Science and Ecotechnology 2024年第6期22卷 226-232页

作者： Weiwei Song Mengying Wang Yixuan Zhao Yu Bo Wanying Yao Ruihan Chen Xianshi Wang Xiaoyan Wang Chunhui Li Kebin He State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin150090China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing100084China Institute of Atmospheric Physics Chinese Academy of SciencesBeijing100029China Harbin Ecological and Environmental Monitoring Center Harbin150076China Collaborative Innovation Center for Regional Environmental Quality Beijing100084China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing100084China

The application of low-condensation diesel in cold regions with extremely low ambient temperatures(−14 to−29℃)has enabled the operation of diesel ***,it may contribute to heavy haze pollution in cold regions during *** we examine pollutant emissions from low-condensation diesel in *** measure the emissions of elemental carbon(EC),organic carbon(OC),and elements,including heavy metals such as arsenic(As).Our results show that low-condensation diesel increased EC and OC emissions by 2.5 and 2.6 times compared to normal diesel fuel,*** of vehicular sources,including EC,As,lead(Pb),cadmium(Cd),chromium(Cr),nickel(Ni),and manganese(Mn),increased by approximately 20.2-162.5%when using low-condensation *** variation of vehicular source indicators,observed at road site ambient environments revealed the enhancement of PM2.5 pollution by the application of low-condensation diesel in *** findings suggest that−35#diesel,a low-cetane index diesel,may enhance air pollution in winter,according to a dynamometer test conducted in *** raises questions about whether higher emissions are released if−35#diesel is applied to running vehicles in real-world cold ambient environments.

关键词： Low condensation diesel Carbonaceous matterHeavy metal Dynamometer Cold regions

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Electrostatic removal of ultrafine carbon black with square-grooved collecting plates:Insights for capturing black carbon emitted from ships

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Journal of environmental Sciences 2024年第2期136卷 559-569页

作者： Zhicheng Wu YifanWang Lingyu Shao Hao Zhang Haobo Dai Haidong Fan Chenghang Zheng Xiang Gao State Key Lab of Clean Energy Utilization State Environmental Protection Engineering Center for Coal-Fired Air Pollution ControlZhejiang UniversityHangzhou 310027China Department of Earth and Environmental Sciences University of ManchesterOxford RoadUnited Kingdom Zhejiang Tiandi Environmental Protection Engineering Co. Ltd.Hangzhou 310012China Baima Lake Laboratory(Zhejiang Provincial Laboratory of Energy and Carbon Neutrality) Hangzhou 310000China

Ships and other mobile pollution sources emitted massive ultrafine and low-resistivity particles containing black carbon(BC),which were harmful to human health and were difficult to capture by conventional electrostatic precipitators(ESPs).In this study,nanoscale carbon black was adopted as simulated particles(SP)with similar physicochemical properties for black carbon emitted from ships(SP-BC)to investigate the feasibility of using an ESP with square-grooved collecting plates for the removal of SP-BC at low *** increased applied voltage significantly improved the total collection of SP-BC whereas may also promote the conversion of relatively larger particle size SP-BC into nano-size below *** outlet number concentration of SP-BC under 27 kV at 130℃was three times that of the *** the reduction of the flow rate could strengthen the capture of SP-BC below20 nm,and under the combined action of low flow rate and maximum applied voltage,the collection efficiency of 20-100 nm SP-BC could exceed 90%.In addition,the escape and capture characteristics of SP-BC under long-term rapping were *** square-grooved collecting plate could effectively restrain the re-entrainment of collected SP-BC generated by rapping,and the nanoscale SP-BC was trapped in the grooves after *** results could provide insights into the profound removal of massive nanoscale black carbon emissions from mobile sources.

关键词： Simulated ship black carbon Electrostatic removal Square-grooved collecting plate Long-term rapping

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Water:The lifeblood of the Earth-human system revealed in elemental correlations

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Science China Earth Sciences 2023年第10期66卷 2386-2390页

作者： Zimeng WANG Yongsheng LIU Anhuai LU Yanxin WANG Department of Environmental Science and Engineering Fudan UniversityShanghai200433China State Key Laboratory of Geological Processes and Mineral Resources School of Earth SciencesChina University of GeosciencesWuhan430074China Beijing Key Laboratory of Mineral Environmental Function School of Earth and Space SciencesPeking UniversityBeijing100871China MOE Key Laboratory of Groundwater Quality and Health State Environmental Protection Key Laboratory of Source Apportionment and Control of Aquatic PollutionSchool of Environmental StudiesChina University of GeosciencesWuhan430074China

*** and human history The rich chemistry of Earth's elements played an inherent and multifaceted role in shaping the course of human ***,the more inert an element is,the simpler it becomes to extract it from miner... 详细信息

关键词： Earth minerals simpler

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Distribution and source of Nitrate in Groundwater in the hilly-Plain Transition Area of Jianghan Plain Using Dual N and O Isotopes of Nitrate

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Journal of Earth Science 2023年

作者： Kewen Luo Teng Ma Shuai Shen School of Environmental Studies China University of Geosciences State Environmental Protection Key Laboratory of Source Apportionment and Control of Aquatic Pollution Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science China University of Geosciences

Nitrogen contamination of groundwater in the Jianghan Plain (JHP) in the middle reach‐es of the Yangtze River is widespread,but the sources and fate of nitrate (NO3-) in the transitional area between plains and hills are poorly *** paper characterized the distribution,sources and transformation processes of NO3-in groundwater in the hilly-plain transition area of JHP through hy‐drogeochemistry and dual isotopes (δ15N and δ18O-NO3-).The hydrogeochemical results showed that the NO3-in the plain and hilly areas is heterogeneous and controlled by *** plain to hilly ar‐eas in summer,NO3-in groundwater has a general trend of decreasing with the direction of groundwa‐ter *** groundwater in the plain area is strongly affected by anthropogenic activities,and the NO3-in the multi-level aquifer gradually decreases with increasing *** in redox conditions caused by river erosion may be responsible for higher NO3-in groundwater along the eroded *** isotopic results showed that NO3-in the hilly area mainly comes from soil organic nitrogen,which is a natural ***,groundwater NO3-in the plain area is strongly affected by livestock manure and domestic sewage,which may be owing to the high density of residents and the impact of anthropo‐genic activities.

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air pollutant emissions induced by rural-to-urban migration during China's urbanization(2005-2015)

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environmental Science and Ecotechnology 2022年第2期10卷 45-53页

作者： Guang Shi Xi Lu Hongxia Zhang Haotian Zheng Zhonghua Zhang Shi Chen Jia Xing Shuxiao Wang State Key Joint Laboratory of Environment Simulation and Pollution Control and School of Environment Tsinghua UniversityBeijing100084PR China Institute for Carbon Neutrality Tsinghua UniversityBeijing100084PR China Beijing Laboratory of Environmental Frontier Technologies Tsinghua UniversityBeijing100084PR China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing100084PR China School of Applied Economics Renmin University of ChinaBeijing100872PR China

As the world's most populous country,China has witnessed rapid urbanization in recent decades,with population migration from rural to urban(RU)regions as the major driving *** to the large gap between rural and urban consumption and investment level,large-scale RU migration impacts air pollutant emissions and creates extra uncertainties for air quality ***,we integrated population migration assessment,an environmentally extended inputeoutput model and structural decomposition analysis to evaluate the NOx,SO2 and primary PM2.5 emissions induced by RU migration during China's urbanization from 2005 to *** results show that RU migration increased air pollutant emissions,while the increases in NOx and SO2 emissions peaked in approximately 2010 at 2.4 Mt and 2.2 Mt,accounting for 9.2%and 8.7%of the national emissions,*** primary PM2.5 emissions induced by RU migration also peaked in approximately 2012 at 0.3 Mt,accounting for 2.8%of the national *** indirect emissions embodied in consumption and investment increased,while household direct emissions *** widening gap between urban and rural investment and consumption exerted a major increasing effect on migration-induced emissions;in contrast,the falling emission intensity contributed the most to the decreasing effect benefitting from end-of-pipe control technology applications as well as improving energy *** peak of air pollutant emissions induced by RU migration indicates that although urbanization currently creates extra environmental pressure in China,it is possible to reconcile urbanization and air quality improvement in the future with updating urbanization and air pollution control policies.

关键词： Urbanization Population migration air pollutant emission reduction Inputeoutput model Structural decomposition analysis

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Evaluation of health benefit using Ben MAP-CE with an integrated scheme of model and monitor data during Guangzhou Asian Games

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Journal of environmental Sciences 2016年第4期28卷 9-18页

作者： Dian Ding Yun Zhu Carey Jang Che-Jen Lin Shuxiao Wang Joshua Fu Jian Gao Shuang Deng Junping Xie Xuezhen Qiu Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control College of Environmental and Energy South China University of Technology Guangzhou Higher Education Mega Center Guangzhou 510006 China. State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084 China USEPA/Office of Air Quality Planning & Standards RTP NC27711 USA Department of Civil Engineering Lamar University Beaumont TX 77710-0024 USA Department of Environmental Science and Engineering Tsinghua University Beijing 100084 China Department of Civil & Environmental Engineering University of Tennessee Knoxville TN 37996-2010 USA Chinese Research Academy of Environmental Sciences Beijing 100012 China

Guangzhou is the capital and largest city（land area：7287 km2）of Guangdong province in South *** air quality in Guangzhou typically worsens in November due to unfavorable meteorological conditions for pollutant *** the Guangzhou Asian Games in November 2010,the Guangzhou government carried out a number of emission control measures that significantly improved the air *** this paper,we estimated the acute health outcome changes related to the air quality improvement during the 2010 Guangzhou Asian Games using a next-generation,fully-integrated assessment system for air quality and health *** advanced system generates air quality data by fusing model and monitoring data instead of using monitoring data alone,which provides more reliable *** air quality estimates retain the spatial distribution of model results while calibrating the value with *** results show that the mean PM2.5concentration in November 2010 decreased by 3.5μg/m^3 compared to that in 2009 due to the emission control *** the analysis,we estimate that the air quality improvement avoided 106 premature deaths,1869 cases of hospital admission,and 20,026 cases of outpatient *** overall cost benefit of the improved air quality is estimated to be 165 million CNY,with the avoided premature death contributing 90%of this *** research demonstrates that Ben MAP-CE is capable of assessing the health and cost benefits of air pollution control for sound policy making.

关键词： air quality Health benefit PM2.5 Ben MAP-CE Data fusion Model and monitor data

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