摘要
分析了2005年郑州市大气可吸入颗粒物(PM10)的污染特征,应用高分辨率场发射扫描电镜(FESEM)和图像分析技术,研究了郑州市2005年夏季大气单颗粒物的形貌特征以及PM10的数量-粒度和体积-粒度分布。研究表明,2005年郑州市大气PM10污染比较严重,其污染程度从高到低依次为春、冬、秋、夏;烟尘集合体、不规则状矿物颗粒物在郑州市2005年夏季大气PM10中占有较大数量,PM10的数量-等效球直径分布的峰值在0.1～0.2μm,PM10的体积-等效球直径分布的峰值则出现在0.7～0.8μm和1～2.5μm范围内,说明在郑州市夏季大气PM10中,细粒子数量占优势,较粗颗粒(主要是矿物颗粒)在数量上对PM10贡献很小,但是对总体积(总质量)的贡献很大。
The pollution characteristic of airborne inhalable particulate matter （PM10） in Zhengzhou in 2005 was analyzed. By means of high resolution field emission scanning electron microcopy （FESEM） and image analysis technology （IA）, the individual particle morphology and their size distribution of particle number and volume of Summer PM10 in Zhengzhou were investigated. The results show that Zhengzhou has a prominent pollution of PM10 in 2005; the pollution in spring is the most serious, followed by winter, autumn and summer. Soot aggregates and irregular mineral particles are dominant in number of summer PM10 in Zhengzhou. The peak of particle number distribution by the equivalent sphere diameter occurs in 0.1-0.2μm, and the peak of particle volume distribution by the equivalent sphere diameter occur in 0.7-0.8μm and 1-2.5μm. These results show that the fine particles are prevailing in summer PM10 in Zhengzhou and the coarse particles contribute less in number and more in total volume （total mass）.
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2008年第5期774-777,共4页
Journal of Liaoning Technical University (Natural Science)
基金
国家自然科学基金资助项目(40575065)
河南省基础与前沿技术研究资助项目(072300460060)
关键词
可吸入颗粒物(PM10)
图像分析
场发射扫描电镜(FESEM)
粒度分布
郑州
inhalable particulate matter （PM10）： image analysis technology （IA）： field emission scanning electron microcopy （FESEM）
size distribution
Zhengzhou
