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| 1 | Characteristics of ozone and ozone precursors(VOCs and NOx) around a petroleum refinery in Beijing, China显示文摘A field measurement campaign for ozone and ozone precursors(VOCs and NOx) was conducted in summer 2011 around a petroleum refinery in the Beijing rural region. Three observation sites were arranged, one at southwest of the refinery as the background, and two at northeast of the refinery as the downwind receptors. Monitoring data revealed the presence of serious surface O3 pollution with the characteristics of high average daily mean and maximum concentrations(64.0 and 145.4 ppbV in no-rain days, respectively) and multi-peak diurnal variation. For NOx, the average hourly concentrations of NO2 and NO were in the range of 20.5–46.1 and 1.8–6.4 ppbV, respectively. For VOC measurement, a total of 51 compounds were detected. Normally, TVOCs at the background site was only dozens of ppbC, while TVOCs at the downwind sites reached several hundreds of ppbC. By subtracting the VOC concentrations at background, chemical profiles of VOC emission from the refinery were obtained, mainly including alkanes(60.0% ± 4.3%), alkenes(21.1% ± 5.5%) and aromatics(18.9% ± 3.9%). Moreover, some differences in chemical profiles for the same measurement hours were observed between the downwind sites; the volume ratios of alkanes with low reactivity and those of alkenes with high reactivity respectively showed an increasing trend and a decreasing trend. Finally, based on temporal and spatial variations of VOC mixing ratios, their photochemical degradations and dispersion degradations were estimated to be 0.15–0.27 and 0.42–0.62, respectively, by the photochemical age calculation method, indicating stronger photochemical reactions around the refinery. | Wei Wei Shuiyuan Cheng Guohao Li Gang Wang Haiyang Wang | 2014 | Journal of Environmental Sciences2014，26，2： | 36 |
| 2 | Trends of chemical speciation profiles of anthropogenic volatile organic compounds emissions in China, 2005-2020显示文摘 | Wei WEI Shuxiao WANG Jiming HAO Shuiyuan CHENG | 2014 | Frontiers of Environmental Science & Engineering2014，8，1： | 13 |
| 3 | Deformation of freezing water droplets on a cold copper surface显示文摘Freezing processes of water and peanut oil droplets on a cold surface are investigated in this paper. We observed during our experiments that the base surface of a water droplet that is in direct contact with the cold surface keeps its original shape, but the other part of the droplet shows an obvious growth along the direction normal to the base surface. One small protrusion appears on the top of the water droplet at the end of the freezing process. The experimental observations also show that no obvious shape change happens during the freezing of peanut oil droplets. It is postulated that the effects of sur- face tension and volume dilatation resulted from liquid-to-solid phase change cause the shape change and protrusions formation. Based on this postulation, a physical and mathematical model is developed. The results of the model of a water droplet’s freezing process correspond with our experimental observations. The observed phenomenon that frost-growth speed on the protrusion is higher than that on the other part of the water droplet is also analyzed. | WANG Jieteng LIU Zhongliang GOU Yujun ZHANG Xinhua CHENG Shuiyuan | 2006 | Science China(Technological Sciences)2006，49，5： | 9 |
| 4 | Effect of wet flue gas desulfurization(WFGD) on fine particle(PM_(2.5)) emission from coal-fired boilers显示文摘In this study, the characteristics of fine particles before and after wet flue gas desulfurization(WFGD) in three coal-fired heating boilers in northern China were investigated by using a dilution-based emission sampling experimental system. The influences of the WFGD process on the mass and number concentrations as well as the chemical composition of fine particles were analyzed. The removal efficiency of desulfurization processes on particulate matter mass was 30.06%–56.25% for the three study units. The WFGD had a great influence on the size distributions of particle mass concentration and number concentration. A significant increase in the number and mass concentration of particles in the size range of 0.094–0.946 μm was observed. The watersoluble ion content accounted for a very large proportion of PM_(2.5) mass, and its proportion in PM_(2.5) increased from 28.39%–41.08% to 48.96%–61.21% after the WFGD process for the three units. The desulfurizing process also drastically increased the proportion of cation component(Ca^(2+) for unit A, Mg^(2+) for unit B, and Na+for unit C) and the proportion of SO_4^(2-) in PM_(2.5), and it increased the CE/AE values of PM_(2.5) from 0.82–0.98 to 0.93–1.27 for the three study units. | Sen Yao Shuiyuan Cheng Jianbing Li Hanyu Zhang Jia Jia Xiaowei Sun | 2019 | Journal of Environmental Sciences2019，31，3： | 8 |
| 5 | On-board measurements of gaseous pollutant emission characteristics under real driving conditions from light-duty diesel vehicles in Chinese cities显示文摘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. | Gang Wang Shuiyuan Cheng Jianlei Lang Song Li Liang Tian | 2016 | Journal of Environmental Sciences2016，28，8： | 6 |
| 6 | Source apportionment of PM2.5 in Tangshan, China --Hybrid approaches for primary and secondary species apportionment显示文摘这篇论文的目的是在 Tangshan 的城市里为下午 2.5 的主要、第二等的种类的来源分配建议一条混合途径。基于受体的 PMF (积极矩阵因式分解) 与排放库存(EI ) 是综合的为主要种类的来源分配形成第一个混合方法。途径当时是的混合 CAMx-PSAT-CP (有扩展微粒来源分配技术化学药品侧面的全面空气质量模型) 求婚了并且为第二等的种类的来源分配使用了。为 Tangshan 识别的下午 2.5 来源包括了土壤灰尘,冶金工业,发电厂, coalfired 锅炉,车辆,水泥生产,和其它采购原料。PM 2.5 污染是一个地区性的问题,这被显示。在所有识别来源之中,冶金学工业是到开火煤的锅炉,车辆和土壤灰尘跟随的下午 2.5, 的最大的贡献来源。其它来源范畴特别地为第二等的种类的形成为下午 2.5, 起一个关键作用并且喷雾器,和这些另外的来源包括象农业活动那样的非指定的来源,生物资源燃烧,居住排出物,等等。来源分配结果能帮助本地当局做健全政策和规定更好保护公民免受本地人和地区性的下午 2.5 污染的伤害。学习也加亮在下午 2.5 来源的鉴定利用建议混合途径的力量。在这研究使用的技术为进一步的申请显示出可观的诺言到另外的区域以及到识别下午 2.5 的另外的来源范畴。 | Wei WEN Shuiyuan CHENG Lei LIU Gang WANG Xiaoqi WANG | 2016 | Frontiers of Environmental Science & Engineering2016，10，5： | 6 |
| 7 | Characterization of aircraft emissions and air quality impacts of an international airport显示文摘Beijing Capital International Airport(ZBAA) is the world's second busiest airport. In this study, the emissions of air pollutants from aircraft and other sources at ZBAA in 2015 were estimated using an improved method, which considered the mixing layer height calculated based on aircraft meteorological data relay(AMDAR), instead of using the height(915 m)recommended by ICAO. The yearly emissions of NO_x, CO, VOCs, SO_2, and PM_(2.5) at the airport were 8.76 × 10~3, 4.43 × 10~3, 5.43 × 10~2, 4.80 × 10~2, and 1.49 × 10~2 ton/year, respectively. The spatial–temporal distribution of aircraft emissions was systematically analyzed to understand the emission characteristics of aircraft. The results indicated that NOxwas mainly emitted during the take-off and climb phases, accounting for 20.5% and 55.5% of the total emissions. CO and HC were mainly emitted during the taxi phase, accounting for 91.6%and 92.2% of the total emissions. Because the mixing layer height was high in summer, the emissions of aircraft were at the highest level throughout the year. Based on the detailed emissions inventory, four seasons simulation using WRF-CMAQ model was performed over the domain surrounding the airport. The results indicated that the contribution to PM_(2.5) was relatively high in winter; the average impact was about 1.15 μg/m^3 within a radius of1 km around the airport. Meanwhile, the near surroundings and southwest areas of the airport are the most sensitive to PM_(2.5). | Xiaowen Yang Shuiyuan Cheng Jianlei Lang Ran Xu Zhe Lv | 2018 | Journal of Environmental Sciences2018，30，10： | 5 |
| 8 | Distinct potential aerosol masses under different scenarios of transport at a suburban site of Beijing显示文摘In order to evaluate the secondary aerosol formation potential at a suburban site of Beijing,in situ perturbation experiments in a potential aerosol mass(PAM) reactor were carried out in the winter of 2014.The variations of secondary aerosol formation as a function of time,OH exposure,and the concentrations of gas phase pollutants and particles were reported in this study.Two periods with distinct secondary aerosol formation potentials,marked as Period Ⅰ and Period Ⅱ,were identified during the observation.In Period Ⅰ,the secondary aerosol formation potential was high,and correlated well to the air pollutants,i.e.,SO_2,NO_2,and CO.The maximal secondary aerosol formation was observed with an aging time equivalent to about 3 days of atmospheric oxidation.In period Ⅱ,the secondary aerosol formation potential was low,with no obvious correlation with the air pollutants.Meanwhile,the aerosol mass decreased,instead of showing a peak,with increasing aging time.Backward trajectory analysis during the two periods confirmed that the air mass in Period Ⅰwas mainly from local sources,while it was attributed mostly to long distance transport in Period Ⅱ.The air lost its reactivity during the long transport and the particles became highly aged,resulting in a low secondary aerosol formation potential.Our experimental results indicated that the in situ measurement of the secondary aerosol formation potential could provide important information for evaluating the contributions of local emission and long distance transport to the aerosol pollution. | Biwu Chu Yongchun Liu Qingxin Ma Jinzhu Ma Hong He Gang Wang Shuiyuan Cheng Xinming Wang | 2016 | Journal of Environmental Sciences2016，28，1： | 5 |
| 9 | Catalytic oxidation of carbon monoxide, toluene, and ethyl acetate over the xPd/OMS-2 catalysts: Effect of Pd loading显示文摘在 cryptomelane 类型锰氧化物上支持的 Pd 催化剂八面的分子的筛(OMS-2 ) 被准备。在 xPd/OMS-2 上在碳一氧化物,甲苯,和乙醇醋酸盐的催化氧化上装载的 Pd 的效果被调查了。结果证明装载的 Pd 在与是的 0.5Pd/OMS-2 催化剂超过 Pd 免费的对应物的 xPd/OMS-2 催化剂的物理化学的性质上起一个重要作用最好。为 50% 变换的温度是 25, 240 和 160 迥龔鳥蚈? 蒚? ?? ? | Zhidan Fu Lisha Liu Yong Song Qing Ye Shuiyuan Cheng Tianfang Kang Hongxing Dai | 2017 | Frontiers of Chemical Science and Engineering2017，11，2： | 3 |
| 10 | A monitoring-modeling approach to SO_4^(2-) and NO_3^- secondary conversion ratio estimation during haze periods in Beijing, China显示文摘SO_4^(2-) and NO_3^- are important chemical components of fine particulate matter(PM_(2.5)),especially during haze periods.This study selected two haze episodes in Beijing,China with similar meteorological conditions.A monitoring-modeling approach was developed to estimate the secondary conversion ratios of sulfur and nitrogen based on monitored and simulated concentrations.Measurements showed that in Episode 1(24th–25th October,2014),the concentrations(proportions)of SO_4^(2-) and NO_3^- reached 35.1μg/m^3(14.9%) and 55.0μg/m^3(22.9%),while they reached 14.4μg/m^3(9.3%) and 59.1μg/m^3(38.1%)in Episode 2(26th–27th October,2017).A modeling system was applied to apportion Beijing's SO_4^(2-) and NO_3^- in primary and secondary SO_4^(2-)/NO_3^- emitted from local and regional sources.Thus,secondary conversion contributions considering the local and regional level were defined.The former primarily focused on Beijing atmospheric oxidation ability and the latter mainly considered the existence form of Beijing SO_4^(2-)/NO_3^- under the regional transport impacts.Finally,secondary oxidation ratios were estimated through combining secondary conversion contribution coefficients for simulated and monitored concentrations.At regional level,sulfur oxidation ratios in polluted(clean)days during two sampling periods were0.57–0.72(0.07–0.52)and 0.74–0.80(0.08–0.61),nitrogen oxidation ratios were 0.20–0.29(0.05–0.15)and 0.34–0.38(0.02–0.29),indicating that atmospheric oxidation was enhanced when considering regional transport through 2014–2017.At the local level,sulfur oxidation ratios were 0.66–0.71(0.04–0.48)in haze(clean)days,while nitrogen oxidation ratios were0.16–0.29(0.02–0.16).The atmospheric oxidation ability markedly increased in PM_(2.5)pollution days,but changed only slightly between the two periods. | Xiaoqi Wang Wei Wei Shuiyuan Cheng Chong Zhang Wenjiao Duan | 2019 | Journal of Environmental Sciences2019，31，4： | 3 |
| 11 | Negative Phototropism of Chlorophytum comosum Roots and Their Mechanisms显示文摘The aerial roots of Chlorophytum comosum were grown hydroponically,allowing us to study the performance and mechanism of negative phototropism. The results of this study were as follows. All the adventitious roots and their branch roots bent away from light with a maximum curvature of approximately 88.5°. Blue-violet light prominently induced negative phototropism while red light had no effect. The root cap was the site of photo perception. Roots with shaded or divested root caps exposed to unilateral light showed no negative phototropism,but resumed their original characteristics when the shade was removed or when new root caps grew. The curvature increased when the light intensity ranged 0–110 μmol·m^(-2)·s^(-1). The negative phototropism curvature could be promoted by exogenous CaCl_2 but was inhibited by exogenous LaCl_3; exogenous CaCl_2 could reduce the inhibitory effect of LaCl_3. Unilateral light induced the horizontal transport of IAA from the irradiated side to the shaded side,resulting in an unequal distribution of IAA in both the sides,leading to negative phototropism. The horizontal transport of IAA was promoted by exogenous Ca^(2+) but inhibited by exogenous La^(3+). | CHEN Juan KONG Yu WANG Zhong CHENG Shuiyuan GUYunjie GAN Jie CHEN Peng | 2015 | Horticultural Plant Journal2015，1，1： | 2 |
| 12 | Adsorption performance of CMK-3 and C-FDU-15 in NO removal at low temperature显示文摘CMK-3 and C-FDU-15 samples were synthesized using hard-templating and evaporationinduced self-assembly(EISA)methods,respectively.The pore structures of CMK-3 and CFDU-15 as well as commercial activated carbon were characterized by means of X-ray diffraction,field emission scanning electron microscopy,transmission electron microscopy,and N2 adsorption–desorption.Adsorption of NO was investigated by means of thermogravimetric analysis,temperature-programmed desorption of NO+O2,and in situ diffuse reflectance Fourier transform infrared spectroscopy.The results show that the CMK-3 and C-FDU-15 materials possessed ordered and uniform structures.The coadsorption capacity of NO and O2 decreased in the sequence CMK-3(88.6 mg/g)>C-FDU-15(71.7 mg/g)>AC(25.3 mg/g).There were two main adsorption species on CMK-3 and CFDU-15:nitrite and nitrate.Nitrite is converted to nitrate easily.However,the adsorption species were more complex on AC,with nitrite being the main species.Moreover,CMK-3 and C-FDU-15 exhibit excellent regeneration efficiency compared with AC.The excellent NO adsorption performance of CMK-3 and C-FDU-15 was associated with their ordered mesoporous structures and high surface areas.The research provides more options for NO adsorption in the future. | Runping Wu Qing Ye Kai Wu Shuiyuan Cheng Tianfang Kang Hongxing Dai | 2020 | Journal of Environmental Sciences2020，32，1： | 2 |
| 13 | Enhanced catalytic performance of Cu-and/or Mn-loaded Fe-Sep catalysts for the oxidation of CO and ethyl acetate显示文摘The Fe-modi fied sepiolite-supported Mn–Cu mixed oxide(Cux Mny/Fe-Sep) catalysts were prepared using the co-precipitation method.These materials were characterized by means of the XRD,N_2 adsorption–desorption,XPS,H_2-TPR,and O_2-TPD techniques,and their catalytic activities for CO and ethyl acetate oxidation were evaluated.The results show that catalytic activities of the Cux Mny/Fe-Sep samples were higher than those of the Cu1/Fe-Sep and Mn2/Fe-Sep samples,and the Mn/Cu molar ratio had a distinct in fluence on catalytic activity of the sample.Among the Cux Mny/Fe-Sep and Cu1Mn2/Sep samples,Cu1Mn2/Fe-Sep performed the best for CO and ethyl acetate oxidation,showing the highest reaction rate and the lowest T50 and T90 of 4.4×10^(-6) mmol·g-1·s-1,110,and 140 °C for CO oxidation,and 1.9×10^(-6) mmol·g-1·s-1,170,and210 °C for ethyl acetate oxidation,respectively.Moreover,the Cu1Mn2/Fe-Sep sample possessed the best lowtemperature reducibility and the lowest temperature of oxygen desorption as well as the highest surface Mn^(4+)/Mn^(3+) and Cu^(2+)/CuO atomic ratios.It is concluded that factors,such as the strong interaction between the Cu or Mn and the Fe-Sep support,good low-temperature reducibility,and good mobility of chemisorbed oxygen species,might account for the excellent catalytic activity of Cu1Mn2/Fe-Sep. | Lisha Liu Yong Song Zhidan Fu Qing Ye Shuiyuan Cheng Tianfang Kang Hongxing Dai | 2017 | Chinese Journal of Chemical Engineering2017，25，10： | 2 |
| 14 | The assessment of emission-source contributions to air quality by using a coupled MM5-ARPS-CMAQ modeling system: A case study in the Beijing metropolitan region, China显示文摘 | Shuiyuan Cheng Dongsheng Chen Jianbing Li Haiyan Wang Xiurui Guo | 2006 | Environmental Modelling and Software2006，，11： | 2 |
| 15 | A framework for investigating the air quality variation characteristics based on the monitoring data: Case study for Beijing during 2013–2016显示文摘In this study, an analysis framework based on the regular monitoring data was proposed for investigating the annual/inter-annual air quality variation and the contributions from different factors(i.e., seasons, pollution periods and airflow directions), through a case study in Beijing from 2013 to 2016. The results showed that the annual mean concentrations(MC) of PM_(2.5), SO_2, NO_2 and CO had decreased with annual mean ratios of 7.5%, 28.6%, 4.6%and 15.5% from 2013 to 2016, respectively. Among seasons, the MC in winter contributed the largest fractions(25.8%~46.4%) to the annual MC, and the change of MC in summer contributed most to the inter-annual MC variation(IMCV) of PM_(2.5) and NO2. For different pollution periods, gradually increase of frequency of S-1(PM_(2.5), 0~ 75 μg/m^3) made S-1 become the largest contributor(28.8%) to the MC of PM_(2.5) in 2016, it had a negative contribution(-13.1%) to the IMCV of PM_(2.5); obvious decreases of frequencies of heavily polluted and severely polluted dominated(44.7% and 39.5%) the IMCV of PM_(2.5). For different airflow directions, the MC of pollutants under the south airflow had the most significant decrease(22.5%~62.5%), and those decrease contributed most to the IMCV of PM_(2.5)(143.3%),SO2(72.0%), NO_2(55.5%) and CO(190.3%); the west airflow had negative influences to the IMCV of PM_(2.5), NO_2 and CO. The framework is helpful for further analysis and utilization of the large amounts of monitoring data; and the analysis results can provide scientific supports for the formulation or adjustment of further air pollution mitigation policy. | Jixian Cui Jianlei Lang Tian Chen Shushuai Mao Shuiyuan Cheng Zhanshan Wang Nianliang Cheng | 2019 | Journal of Environmental Sciences2019，31，7： | 2 |
| 16 | An ARPS-CMAQ Modeling Approach for Assessing the Atmospheric Assimilative Capacity of the Beijing Metropolitan Region显示文摘 | Shuiyuan Cheng Dongsheng Chen Jianbing Li Xiurui Guo Haiyan Wang | 2007 | Water Air and Soil Pollution (-)2007，，1： | 1 |
| 17 | An R2R3-MYB transcription factor as a negative regulator of the flavonoid biosynthesis pathway in Ginkgo biloba显示文摘 | Feng Xu Yingjing Ning Weiwei Zhang Yongling Liao Linling Li Hua Cheng Shuiyuan Cheng | 2014 | Functional & Integrative Genomics2014，，1： | 1 |
| 18 | The assessment of emission-source contributions to air quality by using a coupled MM5-ARPS-CMAQ modeling system:a case study in the Beijing metropolitan region,China显示文摘 | CHENG Shuiyuan CHEN Dongsheng LI Jianbing | 2007 | Environmental Modelling & Software2007，22，： | 1 |
| 19 | Application of LIDAR technique and MM5-CMAQ modeling approach for the assessment of winter PM10 air pollution:a case study in Beijing,China显示文摘 | CHEN Dongsheng CHENG Shuiyuan LI Jianbing | 2007 | Water Air Soil Pollut2007，181，： | 1 |
| 20 | An integrated MM5-CMAQ modeling approach for assessing trans-boundary PM10 contribution to the host city of 2008 Olympic summer games-Beijing,China显示文摘 | CHEN Dongsheng CHENG Shuiyuan LIU Lei | 2007 | Atmos Environ2007，41，6： | 1 |
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