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611.
Xianbao Shen Jiateng Hao Lei Kong Yue Shi Xinyue Cao Jiacheng Shi Zhiliang Yao Xin Li Bobo Wu Yiming Xu Kebin He 《环境科学学报(英文版)》2021,33(9):138-149
A rapid reaction occurs near the exhaust nozzle when vehicle emissions contact the air. Twenty diesel vehicles were studied using a new multipoint sampling system that is suitable for studying the exhaust plume near the exhaust nozzle. The variation characteristics of fine particle matter (PM2.5) and its components in diesel vehicle exhaust plumes were analyzed. The PM2.5 emissions gradually increased with increasing distance from the nozzle in the plume. Elemental carbon emissions remained basically unchanged, organic carbon and total carbon (TC) increased with increasing distance. The concentrations of SO42?, NO3? and NH4+ (SNA) directly emitted by the vehicles were very low but increased rapidly in the exhaust plume. The selective catalytic reduction (SCR) reduced 42.7% TC, 40% NO3? emissions, but increased 104% SO42? and 36% NH4+ emissions, respectively. In summary, the SCR reduced 29% primary PM2.5 emissions for the tested diesel vehicles. The NH4NO3 particle formation maybe more important in the plume, and there maybe other forms of formation of NH4+ (eg. NH4Cl). The generation of secondary organic carbon (SOC) plays a leading role in the generation of secondary PM2.5. The SCR enhanced the formation of SOC and SNA in the plume, but comprehensive analysis shows that the SCR more enhanced the SNA formation in the plume, which is mainly new particles formation process. The inconsistency between secondary organic aerosol (SOA) and primary organic aerosol definitions is one of the important reasons for the difference between SOA simulation and observation. 相似文献
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中国废水排放量预测研究 总被引:2,自引:0,他引:2
文章在综合分析中国废水排放量影响因素的基础上,结合ARMA、多元线性回归方法构建了中国废水排放量预测模型,并对2013年-2015年中国废水排放量进行了预测,结果表明:2013年-2015年中国废水排放量将分别达到729.98亿吨、768.97亿吨、810.71亿吨;造纸印刷及文教用品制造业、化学工业等行业废水排放量及单位增加值废水排放量均较大,相关部门需对减排的各个过程进行规范和严格的监督。 相似文献
614.
Xue Qingju Kong Ming Xie Liqiang Li Tong Liao Mengna Yan Zebin Zhao Yanyan 《Environmental science and pollution research international》2022,29(58):87132-87143
Environmental Science and Pollution Research - Harmful cyanobacterial blooms are increasing in frequency and severity, which makes their toxic secondary metabolites of microcystins (MCs) have been... 相似文献
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Cai Xin Yan Yingying Li Shuanglin Kong Shaofei Liu Mengyao Zhang Zexuan 《Environmental science and pollution research international》2022,29(11):15763-15776
Environmental Science and Pollution Research - Global tropospheric nitrogen dioxide (NO2) changes have different or even opposite impacts on the photochemical formation of ozone in different... 相似文献
617.
Yuan Liang Chen Yuying He Weijun Kong Yang Wu Xia Degefu Dagmawi Mulugeta Ramsey Thomas Stephen 《Environmental science and pollution research international》2022,29(46):69753-69770
Environmental Science and Pollution Research - Under the background that China puts forth the goals of “Emission Peak” and “Carbon Neutrality”, heavily polluting... 相似文献
618.
Zhu Benjie Jiang Guofei Kong Can Sun Junzhi Liu Fang Wang Yongqiang Zhao Chaocheng Liu Chunshuang 《Environmental science and pollution research international》2022,29(39):58716-58729
Environmental Science and Pollution Research - In order to improve the visible light response, N-doping ZnS (N-ZnS) nanospheres with Zn vacancy and porous surface were prepared by a simple one-pot... 相似文献
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620.
Kong Xiangke Wang Yanyan Ma Lisha Li Hui Han Zhantao 《Environmental science and pollution research international》2022,29(30):45328-45337
Environmental Science and Pollution Research - Oxidation of Cr(III) by birnessite (δ-MnO2) was an important geochemical reaction determining the toxicity and mobility of dissolved Cr(III) in... 相似文献