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421.
Hua Wang Yun Zhu Carey Jang Che-Jen Lin Shuxiao Wang Joshua S. Fu Jian Gao Shuang Deng Junping Xie Dian Ding Xuezhen Qiu Shicheng Long 《环境科学学报(英文版)》2015
Due to the increasingly stringent standards, it is important to assess whether the proposed emission reduction will result in ambient concentrations that meet the standards. The Software for Model Attainment Test—Community Edition (SMAT-CE) is developed for demonstrating attainment of air quality standards of O3 and PM2.5. SMAT-CE improves computational efficiency and provides a number of advanced visualization and analytical functionalities on an integrated GIS platform. SMAT-CE incorporates historical measurements of air quality parameters and simulated air pollutant concentrations under a number of emission inventory scenarios to project the level of compliance to air quality standards in a targeted future year. An application case study of the software based on the U.S. National Ambient Air Quality Standards (NAAQS) shows that SMAT-CE is capable of demonstrating the air quality attainment of annual PM2.5 and 8-hour O3 for a proposed emission control policy. 相似文献
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Yun Zhu Yanwen Lao Carey Jang Chen-Jen Lin Jia Xing Shuxiao Wang Joshua S. Fu Shuang Deng Junping Xie Shicheng Long 《环境科学学报(英文版)》2015
This article describes the development and implementations of a novel software platform that supports real-time, science-based policy making on air quality through a user-friendly interface. The software, RSM-VAT, uses a response surface modeling (RSM) methodology and serves as a visualization and analysis tool (VAT) for three-dimensional air quality data obtained by atmospheric models. The software features a number of powerful and intuitive data visualization functions for illustrating the complex nonlinear relationship between emission reductions and air quality benefits. The case study of contiguous U.S. demonstrates that the enhanced RSM-VAT is capable of reproducing the air quality model results with Normalized Mean Bias < 2% and assisting in air quality policy making in near real time. 相似文献
423.
Characteristics of toluene decomposition and formation of nitrogen oxide (NOx) by-products were investigated in a dielectric barrier discharge (DBD) reactor with/without catalyst at room temperature and atmospheric pressure. Four kinds of metal oxides, i.e., manganese oxide (MnOx), iron oxide (FeOx), cobalt oxide (CoOx) and copper oxide (CuO), supported on Al2O3/nickel foam, were used as catalysts. It was found that introducing catalysts could improve toluene removal efficiency, promote decomposition of by-product ozone and enhance CO2 selectivity. In addition,NOxwas suppressedwith the decrease of specific energy density (SED) and the increase of humidity, gas flow rate and toluene concentration, or catalyst introduction. Among the four kinds of catalysts, the CuO catalyst showed the best performance in NOx suppression. The MnOx catalyst exhibited the lowest concentration of O3 and highest CO2 selectivity but the highest concentration of NOx. A possible pathway for NOx production in DBD was discussed. The contributions of oxygen active species and hydroxyl radicals are dominant in NOx suppression. 相似文献
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Xue Fei Xi Lei Wang Jia Jun Hu Yu Shu Tang Yu Hu Xiao Hua Fu Ying Sun Yiu Fai Tsang Yan Nan Zhang Jin Hai Chen 《环境科学学报(英文版)》2014,26(12):2562-2570
Estuarine wetland, where freshwater mixes with salt water, comprises different regions(rivers and marine ecosystems) with significantly varying tidal salinities. Two sampling areas, ZXS and JS, were selected to investigate the effect of tidal salinity on soil respiration(SR). ZXS and JS were located in Zhongxia Shoal and Jiangyanan Shoal of Jiuduansha Wetland respectively, with similar elevation and plant species, but significantly different in salinity. The results showed that with almost identical plant biomass, the SR and soil microbial respiration(SMR) of the tidal wetland with lower salinity(JS) were significantly higher than those of the tidal wetland with higher salinity(ZXS)(p 〈 0.05). However, unlike SMR and SR, the difference in the soil microbial biomass(SMB) was not significant(p 〉 0.05)with the SMB of ZXS a little higher than that of JS. The higher SMR and SR of JS may be closely connected to the soil microbial community structures and amount of dominant bacteria. Abundant β- and γ-Proteobacteria and Actinobacteria in JS soil, which have strong heterotrophic metabolic capabilities, could be the main reason for higher SMR and SR,whereas a high number of ε-Proteobacteria in ZXS, some of which have carbon fixation ability, could be responsible for relatively lower carbon output. Path analysis indicated that soil salinity had the maximum negative total influencing coefficient with SMR among the various soil physical and chemical factors, suggesting that higher soil salinity, restricting highly heterotrophic bacteria, is the principle reason for lower SMR and SR in the ZXS. 相似文献
426.
在国家"863"项目"重点城市群大气复合污染综合防治技术与集成示范项目"的研究中,通过利用DirectX3D编程技术将体积雾与体纹理技术进行创造性结合,实现了空气质量预测数据的三维雾化展示。本文主要阐述了此研究的背景、研究过程、技术要点及研究成果。 相似文献
427.
煤制气废水处理技术研究进展综述 总被引:2,自引:0,他引:2
基于中国能源结构特点,新型煤化工产业近年来得到大力推进,尤其煤制气项目发展迅速,而煤化工废水处理及综合利用成为限制其发展的瓶颈因素之一。文中介绍了煤制气废水来源、特点、处理难度,依照煤制气废水的常规处理流程,从预处理、生化处理、深度处理三个方面详细介绍国内外煤制气废水处理应用实例及技术研究现状,指出废水处理关键问题,为解决煤制气产业废水治理问题提供参考。 相似文献
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长距离原油管道在密闭输送过程中,出现非正常停泵、误关阀门等均会引起水击现象发生,水击波沿管道传播,极易导致管道局部超压而造成管道破裂、设备损坏等事故.鉴于甬沪宁管线落差大、管道水力工况复杂等特点,分析水击现象的产生并加以防范是十分必要的. 相似文献