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。
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.
出处
《中国环境监测》
CAS
CSCD
北大核心
2016年第2期38-43,共6页
Environmental Monitoring in China
基金
国家自然科学基金(51246008)
湖南省自然科学基金(13JJ9015)
关键词
粒径分布
细颗粒物
扫描电迁移率粒径谱仪
车流量
particle size distribution
fine particulate matter
Scanning Mobility Particle Spectrometer（SMPS）
traffic car flow
