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- Title
柴油车尾气颗粒物的形貌结构及元素分布研究.
- Authors
王安; 邵阳; 马玲玲; 孙劲旅; 徐殿斗; 罗敏
- Abstract
The motor vehicle, particularly the diesel vehicle, is the main source of fine PMs emission in the cities, however, the research regarding the emission characteristics of the particles (DEPs) of'National ⅤStandard 'diesel vehicle exhaust is yet rather limited. This paper reports a experimental testing involving DEPs sampled from a medium-sized diesel vehicle at idling-speed status, and the investigation of the morphological structure and elemental distribution characteristics of DEPs in terms of five kinds of diameter (F0<0.2 μm, F1 0.2~0.5 μm, F2 0.5~1.0 μm, F3 1.0~2.5 μm and F4>2.5 μm). As a result, the testing showed that exhaust emissions from diesel vehicle were mainly particles with an aerodynamic diameter of less than 0.2 μm; the morphology analysis indicated that DEPs were composed of a lot of carbon soot particles and inorganic ashes, and the carbon soot particles were mainly in particle size smaller than 1 μm, and inorganic ashes were mostly in particle size bigger than 2.5 μm. Furthermore, DEPs contained the elements including P, S, Ca, Zn, Fe, Al, Si, Pb, Ti, Sr and Sb, and most of the inorganic elements were mainly adsorbed on the particles of aerodynamic diameter >0.5 μm, while Zn elements were mostly adsorbed on the particles of aerodynamic diameter <0.2 μm.
- Subjects
DIESEL motor exhaust gas; MOTOR vehicles; SOOT; PARTICULATE matter; TRACE elements; DIAMETER
- Publication
Environmental Science & Technology (10036504), 2022, Vol 45, Issue 6, p154
- ISSN
1003-6504
- Publication type
Article
- DOI
10.19672/j.cnki.1003-6504.0304.22.338