机动车细微颗粒物及气体污染物排放的隧道实测研究  

On-road fine particles and gaseous emission in real-world road tunnel measurement

作　　者：朱春[1,2] 张旭[1] Morawska Lidia 

机构地区：[1]同济大学机械工程学院,上海200092 [2]昆士兰科技大学物理化学系

出　　处：《环境污染与防治》2010年第5期19-25,共7页Environmental Pollution & Control

基　　金：国家留学基金委"2008年建设高水平大学"留学资助项目(No.2008103042)

摘　　要：利用隧道实验法对澳洲Vulturestreet公交专用隧道的细微颗粒物和气体污染物进行连续4d实测,分析了自然通风和纵向通风下隧道内NOX、细微颗粒物数目浓度以及细微颗粒物粒度分布特征。结果表明,隧道内细微颗粒物粒径谱呈双峰分布,峰值区段细微颗粒物粒径分别在19～25、70～105nm,判定为低硫柴油公交车和CNG公交车共同作用结果。隧道内NO2/NOX比值与NOX具有很强的相关性(R2=0.8320),当NOX大于1.000×10-6时,NO2/NOX渐进于(0.088±0.001),同时,NOX与细微颗粒物数目浓度、细微颗粒物总体积(VFP)呈明显的线性相关关系。柴油公交车和CNG公交车的混合条件下,细微颗粒物数目浓度、NOX平均排放因子分别为(2.48±1.53)×1014个/km、(12.8±5.1)g/km,柴油车和CNG公交车细微颗粒物数目浓度排放因子和NO排放因子没有明显差异。Measurements of fine particles and gaseous emission in the mid and at the entrance of an urban road tunnel were conducted in 4 consecutive days to investigated the characteristic of NOx concentration, grain size distribution and number concentration of fine particles. The size distribution in the mid tunnel appears bi-modal mode ranged at 19-25 and 70-105 nm respectively, which is determined as the combination effect of CNG and diesel bus. A significant correlation was found between NO2/NOx ratio and NOx, and the NO2/NOx ratio dosed to （0. 088 ± 0. 001） when NOx concentration was more than 1. 000 × 10^-6. NOx was also highly correlated with particles number concentration and particle volume （VFP） with linear regression R^2 of 0. 867 6 and 0. 867 8. Everaged emission factors of mixed diesel/CNG buses fleet were determined as（2.48±1.53）×10^14p/km for particle number and （12.8±5.1） g/km for NOx.

关 键 词：细微颗粒物 数目浓度 粒度分布 NOX 

分 类 号：X831[环境科学与工程—环境工程]