中文摘要：

2014年夏季采用扫描电迁移率粒径谱仪,选取株洲市某交通干道附近,对其环境细颗粒物进行连续测量,并统计干道的车流量。实验结果表明：环境中的细颗粒物数浓度呈双峰分布,峰值一般出现在9.47-17.5、98.2-121.9 nm粒径段,晴天和雨天不同粒径段的细颗粒物数浓度的波动性不一致,降水过程对细颗粒有一定的去除作用。结合所观测的机动车流量和所排放的细颗粒物粒径谱,分析其与细颗粒物浓度之间的关系,可初步判断该环境中爱根核模态的细颗粒物来源于机动车排放。

英文摘要：

Continuous online measurements of fine particle number size distribution were conducted in the summer of 2014 by using Scanning Mobility Particle Spectrometer（ SMPS） in the vicinity of a traffic artery of Zhuzhou,and traffic flow was measured simultaneously. Experimental results indicated that number concentration of particle had two notable peaks,which were in the range of 9. 47- 17. 5,98. 2- 121. 9nm. The concentration of all mode particles had an obvious difference between sunny day and rainy day,and rain process had a great effect on scavenging particles. The analysis of the relationship of traffic flow and fine particles stated that vehicle exhaust pollutants were an important source of Aitken mode particles.