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A new scheme of PM_(2.5)and O_(3) control strategies with the integration of SOM,GA and WRF-CAMx

Journal of Environmental Sciences 2024年第4期138卷 249-265页

作者： Wenjiao Duan Xiaoqi Wang shuiyuan cheng Ruipeng Wang Key Laboratory of Beijing on Regional Air Pollution Control Faculty of Environment and LifeBeijing University of TechnologyBeijing 100124China

Previous air pollution control strategies didn’t pay enough attention to regional collaboration and the spatial response sensitivities,resulting in limited control effects in *** study proposed an effective PM_(2.5)and O_(3) control strategy scheme with the integration of Self-Organizing Map(SOM),Genetic Algorithm(GA)and WRF-CAMx,emphasizing regional collaborative control and the strengthening of control in sensitive *** scheme embodies the idea of hierarchical management and spatial-temporally differentiated management,with SOM identifying the collaborative subregions,GA providing the optimized subregion-level priority of precursor emission reductions,and WRF-CAMx providing response sensitivities for grid-level priority of precursor emission *** Beijing-Tianjin-Hebei and the surrounding area(BTHSA,“2+26”cities)as the case study area,the optimized strategy required that regions along Taihang Mountains strengthen the emission reductions of all precursors in PM_(2.5)-dominant seasons,and strengthen VOCs reductions but moderate NOx reductions in O_(3)-dominant *** spatiotemporally differentiated control strategy,without additional emission reduction burdens than the 14th Five-Year Plan proposed,reduced the average annual PM_(2.5)and MDA8 O_(3) concentrations in 28 cities by 3.2%-8.2% and 3.9%-9.7% respectively in comparison with non-differential control strategies,with the most prominent optimization effects occurring in the heavily polluted seasons(6.9%-18.0%for PM_(2.5)and 3.3%-14.2% for MDA8 O_(3),respectively).This study proposed an effective scheme for the collaborative control of PM_(2.5)and O_(3) in BTHSA,and shows important methodological implications for other regions suffering from similar air quality problems.

关键词： PM_(2.5)and O_(3)control SOM GA WRF-CAMx Bionic algorithm Machine learning

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Determining an optimal control strategy for anthropogenic VOC emissions in China based on source emissions and reactivity

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Journal of Environmental Sciences 2024年第2期136卷 248-260页

作者： Ruipeng Wang Xiaoqi Wang shuiyuan cheng Jiaxian Zhu Xinyu Zhang Long cheng Kai Wang Key Laboratory of Beijing on Regional Air Pollution Control Faculty of Environment and LifeBeijing University of TechnologyBeijing 100124China

An evidence-based control strategy for emission reduction of VOC sources can effectively solve the regional PM2.5and O3compound pollution in *** estimated the anthropogenic VOC emission inventory in China in 2018 and established a source profile database containing 129 sources based on localized detection and the latest research ***,the distribution of the ozone formation potential(OFP)and secondary organic aerosol formation potential(SOAFP)for emission sources was ***,priority control routes for VOC emission sources were proposed for different *** VOC emissions in China reached 27,211.8 Gg in 2018,and small passenger cars,industrial protective coatings,biomass burning,heavy trucks,printing,asphalt paving,oil storage and transportation,coking,and oil refining were the main *** protective coatings,small passenger cars,and biomass burning all contributed significantly to OFP and *** in emission reduction control should be given to industrial protective coatings,small passenger cars,heavy trucks,coking,printing,asphalt paving,chemical fibers,and basic organic chemical sources over the medium and long term in *** addition,the priority control route for VOC emission sources should be adjusted according to the variations in VOC emission characteristics and regional differences,so as to obtain the maximum environmental benefits.

关键词： Volatile organic compounds Anthropogenic emission inventory Reactivity Emission projection Priority control route

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Aerosol-radiation interaction and its variation in North China within 2015–2019 period under continuous PM_(2.5)improvements

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Journal of Environmental Sciences 2024年第2期136卷 81-94页

作者： Zhe Lv Xiaoqi Wang Wei Wei Huahua Bai Xiaoyu Liu Guohao Li shuiyuan cheng Department of Environmental Science and Engineering Beijing University of TechnologyBeijing 100124China Key Laboratory of Beijing on Regional Air Pollution Control Beijing 100124China Beijing Municipal Research Institute of Eco-Environmental Protection Beijing 100037China Beijing Key Laboratory of Urban Atmospheric Volatile Organic Compounds Pollution Control and Application Beijing 100037China

A study was conducted on aerosol-radiation interactions over six cities in this region within the 2015–2019 ***-Chem simulations on 2017 showed that based on the six-city average,the aerosol load(PM_(2.5)concentrations)of 121.9,49.6,43.3,and 66.3μg/m^(3)in January,April,July,and October,mainly lowered the level of downward shortwave radiation by 38.9,24.0,59.1,and 24.4 W/m~2and reduced the boundary layer height by 79.9,40.8,87.4,and 31.0 m,via scattering and absorbing solar *** sensitivity of meteorological changes to identical aerosol loads varied in the order July>January>October and ***,the cooling and stabilizing effects of aerosols further led to increases in PM_(2.5),by23.0,3.4,4.6,and 7.3μg/m^(3)respectively in the four *** sensitivity of the effect of aerosols on PM_(2.5)was greatest in January rather than in July,contrary to the effect on ***,a negative linear relation was observed between daily BLH reductions and aerosol loads in fall and winter,and between PM_(2.5)increases and aerosol loads in all *** the PM_(2.5)pollution improvements in this region,the aerosol radiative forcing was effectively *** should result in daily BLH increases of 10–24 m in fall and winter,and the estimates in Beijing agreed well with the corresponding results based on AMDAR ***,the reduction in aerosol radiation effects brought about daily PM_(2.5)decreases of 1.6-2.8μg/m^(3),accounting for 7.0%–17.7%in PM_(2.5)improvements.

关键词： Radiative forcing Aerosol PM_(2.5) Boundary layer height(BLH) North China

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共封装硒肽和VE微胶囊制备及其理化特性

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食品科学 2024年第1期45卷 181-190页

作者：蔡杰方媛贾继来张碟丛欣程水源武汉轻工大学硒科学与工程现代产业学院国家富硒农产品加工技术研发专业中心湖北省绿色富硒农产品精深加工技术研发工程中心湖北武汉430023 武汉轻工大学大宗粮油精深加工教育部重点实验室农产品加工与转化湖北省重点实验室湖北武汉430023 恩施德源硒材料工程科技有限公司湖北恩施445000

通过乳化-冷冻干燥联合技术构建微胶囊体系,以实现对具有不同极性的物质(亲水性硒肽和亲脂性VE)的稳态化共封装。以包埋率作为参考,通过单因素试验考察壁材浓度、硒肽和VE含量等工艺参数对包埋效果的影响。傅里叶变换红外光谱和扫描电... 详细信息

通过乳化-冷冻干燥联合技术构建微胶囊体系,以实现对具有不同极性的物质(亲水性硒肽和亲脂性VE)的稳态化共封装。以包埋率作为参考,通过单因素试验考察壁材浓度、硒肽和VE含量等工艺参数对包埋效果的影响。傅里叶变换红外光谱和扫描电子显微镜图像表明微胶囊能够有效封装硒肽和VE,并且具有较好的水分散性,复溶后仍保持双重乳液结构。热稳定性分析和2,2’-联氮双(3-乙基苯并噻唑啉-6-磺酸)阳离子自由基清除实验结果证实,相比于硒肽粉末,微胶囊具有更高的热稳定性和抗氧化活性。电子鼻分析结果进一步证实微胶囊体系对硒肽自身异味具有较好的遮掩效果。体外模拟消化实验表明,微胶囊封装提高了硒肽在模拟胃液中的稳定性,并且硒肽在模拟肠液具有更低的保留率,能够被有效释放。相关研究结论将为富硒功能性食品营养补充剂的开发提供理论依据。

关键词：硒肽 VE 共封装乳液微胶囊

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Temporal and spatial characteristics of PM_(2.5) transport fluxes of typical inland and coastal cities in China

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Journal of Environmental Sciences 2021年第5期33卷 229-245页

作者： Panbo Guan Xiaoqi Wicmg shuiyuan cheng Hanyu Zhang Key Laboratory of Beijing on Regional Air Pollution Control Beijing University of TechnologyBeijing100124China

Local pollution and the cross-boundary transmission of pollutants between cities have an inevitable impact on the atmosphere. Quantitative assessments of the contribution of transport to pollution in inland and coastal cities are necessary for the implementation of practical, regional, and joint emission control strategies. In this study, the Comprehensive Air Quality Model(CAMx), together with the Weather Research and Forecasting model(WRF), was used to simulate the contributions to pollution of different cities in 2016. The monthly inflow, outflow, and net flux from the ground to the extended layers served as the three main indicators for the analysis of the interactions of PM_(2.5) transport between adjacent cities. Between inland and coastal cities, the magnitude of inflow and outflow are larger in the former than in the latter. The inflow flux in the inland cities(Beijing and Shijiazhuang) was 10.6 and 10.7 kt/day, respectively, while that in the coastal cities(Tianjin, Shanghai, Hefei, Nanjing, and Hangzhou) was 9.1, 3.3, 5.8, 4.4, and 3.7 kt/day, respectively. In terms of variation over the year, the strongest inflow in the BTH region occurred in April, followed by October, July, and January, while that in the coastal cities in YRD occurred in January, followed by October, April, and July. Therefore, based on the flux intensity calculations and the transport flux pathways, effective joint control measures can be provided with scientific support, and a better understanding of the evolutionary mechanism among inland and coastal cities can be acquired.

关键词： PM_(2.5)flux modeling system regional transport inland cities coastal cities

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京津冀地区大气颗粒物组分污染特征

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环境科学学报 2024年第8期44卷 22-34页

作者：强宇尧王晓琦王传达何帅龙程水源北京工业大学环境科学与工程学院区域大气复合污染防治北京市重点实验室北京100124

本研究对2014年、2018年、2021年京津冀地区典型城市PM_(2.5)与PM_(1)进行样品采集,对不同减排阶段的空气质量改善成效和组分变化开展研究分析.结果表明,大气污染防治行动计划期间,京津冀地区PM_(2.5)浓度与重污染天数持续降低,各城市PM... 详细信息

本研究对2014年、2018年、2021年京津冀地区典型城市PM_(2.5)与PM_(1)进行样品采集,对不同减排阶段的空气质量改善成效和组分变化开展研究分析.结果表明,大气污染防治行动计划期间,京津冀地区PM_(2.5)浓度与重污染天数持续降低,各城市PM_(2.5)浓度改善幅度为23%~51%,重污染天数下降率为50%~73%,北京、石家庄的SO_(4)^(2-)组分占比分别下降1.9%、1.0%,NO_(3)^(-)组分占比分别上升2.9%、5.4%;“蓝天保卫战”阶段京津冀地区PM_(2.5)浓度改善幅度为21%~35%,北京SO_(4)^(2-)和NO_(3)^(-)浓度下降,但占比分别上升3.5%、1.0%,石家庄SO_(4)^(2-)、NO_(3)^(-)浓度和占比均下降,占比分别下降1.1%、1.5%.北京、石家庄PM_(1)与PM_(2.5)浓度变化趋势相似,北京夏、秋、冬季PM_(1)中二次组分(SOA与SNA)的占比均高于PM_(2.5)中二次组分占比,且在灰霾天气较多的冬季占比最大.基于浓度权重轨迹分析方法(CWT)分析污染输送对两城市颗粒物的潜在影响,发现北京主要受西南传输通道和近周边地区传输影响,石家庄主要受京津冀近周边地区影响.

关键词： PM_(2.5) PM_(1) 组分特征组分差异区域传输京津冀

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Exploring drivers of the aggravated surface O_(3) over North China Plain in summer of 2015–2019: Aerosols, precursors, and meteorology

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Journal of Environmental Sciences 2023年第5期127卷 453-464页

作者： Shengju Ou Wei Wei shuiyuan cheng Bin Cai Key Laboratory of Beijing on Regional Air Pollution Control Faculty of Environment and LifeBeijing University of TechnologyBeijing 100124China

Continuous aggravated surface O_(3) over North China Plain(NCP)has attracted widely public ***,we evaluated the effects of changes in aerosols,precursor emissions,and meteorology on O_(3) in summer(June)of 2015–2019 over NCP via 8 scenarios with WRF-Chem *** simulated mean MDA8 O_(3) in urban areas of 13 major cities in NCP increased by 17.1%∼34.8%,which matched well with the observations(10.8%∼33.1%).Meanwhile,the model could faithfully reproduce the changes in aerosol loads,precursors,and meteorological conditions.A relatively-even O_(3) increase(+1.2%∼+3.9%for 24-h O_(3) and+1.0%∼+3.8%for MDA8 O_(3))was induced by PM_(2.5) dropping,which was consistent with the geographic distribution of regional PM_(2.5) ***,the NO_(2) reduction coupled with a nearconstant VOCs led to the elevated VOCs/NOx ratios,and then caused O_(3) rising in the areas under VOCs-limited ***,the pronounced increases occurred in Handan,Xingtai,Shijiazhuang,Tangshan,and Langfang(+10.7%∼+13.6%for 24-h O_(3) and+10.2%∼+12.2%forMDA8 O_(3));while the increases in other citieswere 5.7%∼10.5%for 24-h O_(3) and 4.9%∼9.2%for MDA8 O_(3).Besides,the meteorological fluctuations brought about the more noticeable O_(3) increases in northern parts(+12.5%∼+13.5%for 24-h O_(3) and+11.2%∼+12.4%for MDA8 O_(3))than those in southern and central parts(+3.2%∼+9.3%for 24-h O_(3) and+3.7%∼+8.8%for MDA8 O_(3)).The sum of the impacts of the three drivers reached 16.7%∼21.9%,which were comparable to the changes of the observed O_(3).Therefore,exploring reasonable emissionsreduction strategies is essential for the ozone pollution mitigation over this region.

关键词： Surface ozone Driving force Aerosols Precursors Meteorology WRF-Chem model

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水酶法提取堇叶碎米荠硒蛋白工艺研究

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食品科技 2024年第7期49卷 190-195页

作者：刘海远朱松徐波程水源丛欣朱定祥江南大学食品学院江苏无锡214122 恩施德源硒材料工程科技有限公司湖北恩施445000 武汉轻工大学国家富硒农产品加工技术研发专业中心湖北武汉430023 武汉轻工大学硒科学与工程现代产业学院湖北武汉430023

十字花科植物堇叶碎米荠富含蛋白质,具有很强的聚硒能力。研究表明其硒形态主要是以硒代氨基酸的有机硒形态存在,是一种良好的植物源有机硒食品原料。文章以堇叶碎米荠为原料,研究了物料颗粒度、料液比、酶解温度、酶解提取时间4种不同... 详细信息

十字花科植物堇叶碎米荠富含蛋白质,具有很强的聚硒能力。研究表明其硒形态主要是以硒代氨基酸的有机硒形态存在,是一种良好的植物源有机硒食品原料。文章以堇叶碎米荠为原料,研究了物料颗粒度、料液比、酶解温度、酶解提取时间4种不同提取因素对堇叶碎米荠硒蛋白中蛋白质含量的影响,并对提取出的硒蛋白中的硒含量及其形态进行了分析。结果表明,堇叶碎米荠颗粒度为80目、料液比为1:15、酶解提取温度50℃、酶解提取时间为4 h时,其提取物硒蛋白含量可达35.8%。堇叶碎米荠硒蛋白的硒含量为1892.76 mg/kg,其硒形态主要为硒代胱氨酸/硒代半胱氨酸,占总硒含量百分比为78.8%,有机硒含量可达97.34%,无机硒占比2.66%。

关键词：水酶法堇叶碎米荠硒蛋白硒形态

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Insights into multidimensional transport flux from vertical observation and numerical simulation in two cities in North China

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Journal of Environmental Sciences 2023年第3期125卷 831-842页

作者： Zhida Zhang Xiaoqi Wang shuiyuan cheng Guiqian Tang Yibin Fu Key Laboratory of Beijing on Regional Air Pollution Control Beijing University of TechnologyBeijing 100124China State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry(LAPC) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Key Laboratory of Environmental Optics and Technology Anhui Institute of Optics and Fine MechanicsHefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China

This study represents the first quantitative evaluation of pollution transport budget within the boundary layer of typical cities in the Beijing-Tianjin-Hebei (BTH) region from the perspective of horizontal and vertical exchanges and further discusses the impact of the atmospheric boundary layer (ABL)-free troposphere (FT) exchange on concentration of fine particulate matter (PM_(2.5)) within the ABL during heavy *** the perspective of the transport flux balance relationship,differences in pollution transport characteristics between the two cities is mainly reflected in the ABL-FT exchange *** FT mainly flowed into the ABL in BJ,while in SJZ,the outflow from the ABL to the FT was more *** with an analysis of vertical wind profile distribution,BJ was found to be more susceptible to the influence of northwest cold high prevailing in winter,while sinking of strong cold air allowed the FT flowing into the ABL influence the vertical exchange over *** addition,we selected a typical pollution event for targeted analysis to understand mechanistic details of the influence of ABL-FT exchange on the pollution *** results showed that ABL-FT interaction played an important role in PM_(2.5)concentration within the ABL during heavy *** in the early stage of heavy pollution,FT transport contributed as much as 82.74% of PM_(2.5)within the *** findings are significant for improving our understanding of pollution transport characteristics within the boundary layer and the effect of ABL-FT exchange on air quality.

关键词： Transport flux Horizontal transport Vertical exchange Atmospheric boundary layer Free troposphere Pollutant budget relationship

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On-board measurements of gaseous pollutant emission characteristics under real driving conditions from light-duty diesel vehicles in Chinese cities

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Journal of Environmental Sciences 2016年第8期28卷 28-37页

作者： Gang Wang shuiyuan cheng Jianlei Lang Song Li Liang Tian Key Laboratory of Beijing on Regional Air Pollution Control Beijing University of Technology Beijing 100124 China. Collaborative Innovation Center of Electric Vehicles Beijing 100081 China

A total of 15 light-duty diesel vehicles（LDDVs） were tested with the goal of understanding the emission factors of real-world vehicles by conducting on-board emission measurements. The emission characteristics of hydrocarbons（HC） and nitrogen oxides（NOx） at different speeds, chemical species profiles and ozone formation potential（OFP） of volatile organic compounds（VOCs） emitted from diesel vehicles with different emission standards were analyzed. The results demonstrated that emission reductions of HC and NOxhad been achieved as the control technology became more rigorous from Stage I to Stage IV. It was also found that the HC and NOxemissions and percentage of O2 dropped with the increase of speed, while the percentage of CO2 increased. The abundance of alkanes was significantly higher in diesel vehicle emissions, approximately accounting for 41.1%–45.2%, followed by aromatics and alkenes. The most abundant species were propene,ethane, n-decane, n-undecane, and n-dodecane. The maximum incremental reactivity（MIR）method was adopted to evaluate the contributions of individual VOCs to OFP. The results indicated that the largest contributors to O3 production were alkenes and aromatics, which accounted for 87.7%–91.5%. Propene, ethene, 1,2,4-trimethylbenzene, 1-butene, and1,2,3-trimethylbenzene were the top five VOC species based on their OFP, and accounted for 54.0%-64.8% of the total OFP. The threshold dilution factor was applied to analyze the possibility of VOC stench pollution. The majority of stench components emitted from vehicle exhaust were aromatics, especially p-diethylbenzene, propylbenzene, m-ethyltoluene, and p-ethyltoluene.

关键词： Light-duty diesel vehicles Emission factor Hydrocarbon Nitrogen oxide Volatile organic compounds Ozone formation potential

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