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Emission factors of gaseous carbonaceous species from residential combustion of coal and crop residue briquettes

Frontiers of Environmental Science & Engineering 2013年第1期7卷 66-76页

作者： Qin WANG Chunmei GENG Sihua LU wentai chen Min SHAO State Joint Key Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and Engineering Peking University Beijing 100871 China Chinese Research Academy of Environmental Sciences Beijing 100012 China

Experiments were performed to measure the emission factors ( s) of gaseous carbonaceous species, such as CO , CO, CH , and non-methane volatile organic compounds (NMVOCs), from the combustion of five types of coal of varying organic maturity and two types of biomass briquettes under residential burning conditions. Samples were collected in stainless steel canisters and 2,4-dinitrophenylhydrazine (DNPH) cartridges and were analyzed by GC–FID/MS and HPLC, respectively. The s from crop residue briquette burning were generally higher than those from coals, with the exception of CO . The dominant NMVOC species identified in coal smoke were carbonyls (41.7%), followed by C2 unsaturated hydrocarbons (29.1%) and aromatics (12.1%), while C2 unsaturated hydrocarbons were the dominant species (68.9%) emitted from the combustion of crop residue briquettes, followed by aromatics (14.4%). A comparison of burning normal crop residues in stoves and the open field indicated that briquettes emitted a larger proportion of ethene and acetylene. Both combustion efficiency and coal organic maturity had a significant impact on NMVOC s from burning coal: NMVOC emissions increased with increasing coal organic maturity but decreased as the combustion efficiency improved. Emissions from the combustion of crop residue briquettes from stoves occurred mainly during the smoldering process, with low combustion efficiency. Therefore, an improved stove design to allow higher combustion efficiency would be beneficial for reducing emissions of carbonaceous air pollutants.

关键词： residential combustion coal crop residue briquette emission factors gaseous carbonaceous species

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Investigation of carbonyl compound sources at a rural site in the Yangtze River Delta region of China

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Journal of Environmental Sciences 2015年第2期27卷 128-136页

作者： Ming Wang wentai chen Min Shao Sihua Lu Limin Zeng Min Hu State Joint Key Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and EngineeringPeking University

Carbonyl compounds are important intermediates in atmospheric photochemistry, but their primary sources are still not understood well. In this work, carbonyls, hydrocarbons,and alkyl nitrates were continuously measured during November 2011 at a rural site in the Yangtze River Delta region of China. Mixing ratios of carbonyls and hydrocarbons showed large fluctuations during the entire measurement. The average level for total measured volatile organic compounds during the pollution episode from 25 th to 27 th November, 2011 was 91.6 ppb, about 7 times the value for the clean period of 7th–8th, November, 2011. To preliminarily identify toluene sources at this site, the emission ratio of toluene to benzene（T/B） during the pollution episode was determined based on photochemical ages derived from the relationship of alkyl nitrates to their parent alkanes. The calculated T/B was5.8 ppb/ppb, significantly higher than the values of 0.2–1.7 ppb/ppb for vehicular exhaust and other combustion sources, indicating the dominant influence of industrial emissions on ambient toluene. The contributions of industrial sources to ambient carbonyls were then calculated using a multiple linear regression fit model that used toluene and alkyl nitrates as respective tracers for industrial emission and secondary production. During the pollution episode, 18.5%, 69.0%, and 52.9% of measured formaldehyde, acetaldehyde, and acetone were considered to be attributable to industrial emissions. The emission ratios relative to toluene for formaldehyde, acetaldehyde, and acetone were determined to be 0.10, 0.20 and0.40 ppb/ppb, respectively. More research on industrial carbonyl emission characteristics is needed to understand carbonyl sources better.

关键词： Carbonyl compounds Source apportionment Industrial emission Yangtze River Delta

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Ozone pollution characteristics and sensitivity analysis using an observation-based model in Nanjing,Yangtze River Delta Region of China

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Journal of Environmental Sciences 2020年第7期32卷 13-22页

作者： Ming Wang wentai chen Lin Zhang Wei Qin Yong Zhang Xiangzhi Zhang Xin Xie Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution ControlSchool of Environmental Science and EngineeringNanjing University of Information Science&TechnologyNanjingJiangsuChina Jiangsu Environmental Monitoring Center NanjingJiangsuChina Department of Ecology and Environment of Jiangsu Province NanjingJiangsuChina Nanjing Environmental Monitoring Center Jiangsu ProvinceNanjingJiangsuChina

Ground-level ozone(O3)has become a critical pollutant impeding air quality improvement in Yangtze River Delta region of *** this study,we present O3 pollution characteristics based on one-year online measurements during 2016 at an urban site in Nanjing,Jiangsu ***,the sensitivity of O3 to its precursors during 2 O3 pollution episodes in August was analyzed using a box model based on observation(OBM).The relative incremental reactivity(RIR)of hydrocarbons was larger than other precursors,suggesting that hydrocarbons played the dominant role in O3 *** RIR values for NOX ranged from–0.41%/%to 0.19%/%.The O3 sensitivity was also analyzed based on relationship of simulated O3 production rates with reductions of VOC and NOX derived from scenario *** results illustrate that O3 formation was between VOCs-limited and transition *** and light alkenes were found to be key species in O3 formation according to RIR values,and their sources were determined using the Positive Matrix Factorization(PMF)*** and solvent use was the largest contributor to xylenes(54%),while petrochemical industry was the most important source to propene(82%).Discussions on VOCs and NOX reduction schemes suggest that the 5%O3 control goal can be achieved by reducing VOCs by 20%.To obtain 10%O3 control goal,VOCs need to be reduced by 30%with VOCs/NOX larger than 3:1.

关键词： Ozone sensitivity OBM VOCs Yangtze River Delta

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Volatile organic compounds in wintertime North China Plain:Insights from measurements of proton transfer reaction time-of-flight mass spectrometer(PTR-ToF-MS)

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Journal of Environmental Sciences 2022年第4期34卷 98-114页

作者： Xianjun He Bin Yuan Caihong Wu Sihang Wang Chaomin Wang Yibo Huangfu Jipeng Qi Nan Ma Wanyun Xu Ming Wang wentai chen Hang Su Yafang cheng Min Shao Institute for Environmental and Climate Research Jinan UniversityGuangzhou 511443China Guangdong-Hongkong-Macao Joint Laboratory of Collaborative Innovation for Environmental Quality Guangzhou 511443China State Key Laboratory of Severe Weather&Key Laboratory for Atmospheric Chemistry of China Meteorology Administration Chinese Academy of Meteorological SciencesBeijing 100081China Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution ControlSchool of Environmental Science and EngineeringNanjing University of Information Science&TechnologyNanjing 210044China Nanjing Intelligent Environmental Science and Technology Co. Ltd.Nanjing 211800China Max Planck Institute for Chemistry Mainz 55128Germany

The characteristics of wintertime volatile organic compounds(VOCs)in the North China Plain(NCP)region are complicated and remain *** measurements were conducted by a proton transfer reaction time-of-flight mass spectrometer(PTR-ToF-MS)at a rural site in the NCP from November to December *** ions measured by PTRToF-MS were quantified and the overall VOC compositions were investigated by combining the measurements of PTR-ToF-MS and gas chromatography-mass spectrometer/flame ionization detector(GC-MS/FID).The measurement showed that although atmospheric VOCs concentrations are often dominated by primary emissions,the secondary formation of oxygenated VOCs(OVOCs)is non-negligible in the wintertime,i.e.,OVOCs accounts for 42%±7%in the total VOCs(151.3±75.6 ppbV).We demonstrated that PTR-MS measurements for isoprene are substantially overestimated due to the interferences of *** chemical changes of organic carbon in a pollution accumulation period were investigated,which suggests an essential role of fragmentation reactions for large,chemically reduced compounds during the heavy-polluted stage in wintertime *** changes of emission ratios of VOCs between winter 2011 and winter 2018 in the NCP support the positive effect of“coal to gas”strategies in curbing air *** high abundances of some key species(*** aromatics)indicate the strong emissions of coal combustion in wintertime of *** ratio of naphthalene to C8 aromatics was proposed as a potential indicator of the influence of coal combustion on VOCs.

关键词： North China Plain Volatile organic compound Wintertime PTR-ToF-MS

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河南形象对外传播中文化折扣现象的间性思考

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中州大学学报 2023年第3期40卷 51-56页

作者：陈文泰孙仲伯河南大学新闻与传播学院河南开封475001

河南形象是一个自我叙事与他者想象的间性建构产物,也是呈现河南社会发展与生活状态的符号集群。在建构主义视域下,河南形象在对外传播过程中发生了一系列文化折扣现象。本文以文化折扣现象为切口,从世界性的审美意识形态差异、国家性... 详细信息

河南形象是一个自我叙事与他者想象的间性建构产物,也是呈现河南社会发展与生活状态的符号集群。在建构主义视域下,河南形象在对外传播过程中发生了一系列文化折扣现象。本文以文化折扣现象为切口,从世界性的审美意识形态差异、国家性的大河情感及民族认同和区域性的中原语词符号表征三个方面说明河南形象对外传播中文化折扣现象的生成路径。借助韦勒克的文学内部研究与外部研究二分法,在构建多层和深层传播空间、注重文本译介的“使外国化”等方面为减少形象建构中产生的文化折扣影响提供策略之思。

关键词：河南形象对外传播文化折扣间性

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重大突发事件中政务新媒体公众参与的现实困境与提升路径

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中州大学学报 2021年第2期38卷 71-75页

作者：陈文泰赵慧晴河南大学新闻与传播学院河南开封475001

政务新媒体作为依托新型信息技术实现在线治理与民心相通的支撑平台和互动工具,承载着权威发声、回应关切、政务公开等主要功能。在重大突发事件中,政务新媒体的公众参与面临角色定位不清、回应机制羸弱、治理监管缺位等现实困境。通过... 详细信息

政务新媒体作为依托新型信息技术实现在线治理与民心相通的支撑平台和互动工具,承载着权威发声、回应关切、政务公开等主要功能。在重大突发事件中,政务新媒体的公众参与面临角色定位不清、回应机制羸弱、治理监管缺位等现实困境。通过主动议程设置、转变传播语态、协同传播矩阵、强化风险预警等方式能进一步提升重大突发事件中政务新媒体的传播效果与公众参与意愿。

关键词：重大突发事件政务新媒体公众参与新冠肺炎

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成“物”与去“物”:受众本体存在的价值之问

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中州大学学报 2022年第3期39卷 82-86页

作者：陈文泰孙仲伯河南大学新闻与传播学院河南开封475001

自工业革命以来,人的主体性缺失问题成为批判现实主义者的主要研究对象,受众也正式以“物化”的姿态成为大众传媒经营操控主体。受众“物化”是主体性缺失问题的一种表征,受众“去物”又成了反抗自身工具性的一场运动。以成“物”与去... 详细信息

自工业革命以来,人的主体性缺失问题成为批判现实主义者的主要研究对象,受众也正式以“物化”的姿态成为大众传媒经营操控主体。受众“物化”是主体性缺失问题的一种表征,受众“去物”又成了反抗自身工具性的一场运动。以成“物”与去“物”作为讨论受众本体存在价值的线索轴,通过反思受众“自在”的不可复制性与“此在”的关联性重新建构起受众的传播交往位置。

关键词：物化受众此在自在

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基于城市大气挥发性有机物特征分析的数据质量评估方法及案例

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中国环境监测 2019年第2期35卷 13-22页

作者：王鸣陆思华陈文泰邵敏卢兴东南京信息工程大学环境科学与工程学院江苏南京210044 江苏省大气环境与装备技术协同创新中心江苏南京210044 北京大学环境科学与工程学院北京100871 南京科略环境科技有限责任公司江苏南京211800 暨南大学环境与气候研究院广东广州510632

城市大气挥发性有机物(VOCs)监测是空气质量监测网的重要组成部分,而数据质量控制和质量保证是VOCs监测的基础。基于8次中国城市大气VOCs外场监测,通过挖掘VOCs浓度、组成和化学活性的内在规律,对VOCs监测数据质量进行评估并总结方法。... 详细信息

城市大气挥发性有机物(VOCs)监测是空气质量监测网的重要组成部分,而数据质量控制和质量保证是VOCs监测的基础。基于8次中国城市大气VOCs外场监测,通过挖掘VOCs浓度、组成和化学活性的内在规律,对VOCs监测数据质量进行评估并总结方法。分析结果显示:城市大气乙烷和苯等长寿命组分具有明显的背景浓度,且区域背景值较为接近,可以用来诊断长寿命VOCs组分浓度异常偏低或偏高现象。而示踪组分的季节(日)变化规律可以用来识别VOCs组分定性问题(如夏季大气异戊二烯和烷基硝酸酯浓度日变化规律应反映植被排放和光化学反应特征)。另外,在气团混合均匀的情况下,VOCs浓度波动与其活性之间存在负相关,这一规律可以用来核查数据准确性或局地源影响。

关键词：挥发性有机物质量评估统计分析比值活性

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新文科视野下传媒经济学教学改革“平台+”的逻辑升维

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开封大学学报 2023年第3期37卷 49-53页

作者：陈文泰孙仲伯河南大学新闻与传播学院河南开封475001

在新文科建设教育背景和媒介平台转向技术背景双重驱动影响下,提出了传媒经济学课程的“平台+”教学改革进路,分别从教学内容体系、教学思维能力和教学发展战略三个层面展开讨论,其目的是为传媒经济学课程教学转型及高等教育学科建设路... 详细信息

在新文科建设教育背景和媒介平台转向技术背景双重驱动影响下,提出了传媒经济学课程的“平台+”教学改革进路,分别从教学内容体系、教学思维能力和教学发展战略三个层面展开讨论,其目的是为传媒经济学课程教学转型及高等教育学科建设路径探索提供借鉴。在教学内容体系层面,着眼于促进“平台+”理念下教学形式和学科内容革新;在教学思维能力层面,围绕依托平台赋能,讨论教师教学思路和学生学习思维的共创关系;在教学发展战略层面,则是在平台逻辑上强调,形成以学科思想政治教育的价值引导为内核、以促进社会现代化发展为目的的传媒经济学研究逻辑。三个层面相互联系、密不可分。

关键词：传媒经济学教学改革 “平台+”

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基于CiteSpace的跨境数据流动研究热点与趋势分析

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现代信息科技 2023年第24期7卷 100-107页

作者：陈文泰张林杰河南大学新闻与传播学院河南开封475001

跨境数据流动是数字化背景下经济高质量发展的重要引擎,也是构筑国际竞争新优势的关键抓手。文章以中国知网(CNKI)数据库收录的746篇文章为研究对象,运用信息可视化软件CiteSpace从基本现状、发展流变、研究热点三个角度开展跨境数据流... 详细信息

跨境数据流动是数字化背景下经济高质量发展的重要引擎,也是构筑国际竞争新优势的关键抓手。文章以中国知网(CNKI)数据库收录的746篇文章为研究对象,运用信息可视化软件CiteSpace从基本现状、发展流变、研究热点三个角度开展跨境数据流动的热点与趋势分析。研究发现,我国跨境数据流动增长趋势明显,研究力量之间呈现地区性的聚合趋势,研究热点逐渐聚焦跨境数据流动所带来的经济利益和数据治理问题。

关键词：跨境数据流动数据安全数字经济 CiteSpace可视化分析

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