摘要
利用气相色谱-质谱技术分析了秋季鄂尔多斯市居民区、工业区和清洁区5个采样点大气PM2.5、PM10颗粒物中正构烷烃组分,运用Cmax、CPI、Cn(wax)分子地球化学参数对污染源进行了初步示踪研究,并对污染程度进行了判断.结果表明,鄂尔多斯市秋季大气PM2.5、PM10颗粒物上正构烷烃来源相对比较复杂,各功能区均不同程度的受到人为来源正构烷烃污染的影响.总体来说,工业区和居民区人为来源正构烷烃污染较重,这两个功能区污染状况基本相当,而清洁区受人为来源正构烷烃污染相对较小.在鄂尔多斯地区,气候因素尤其是风向因素对大气颗粒物上正构烷烃污染水平的影响比较大.通过与我国其它大中型城市进行对比发现,我国大部分城市市区大气PM2.5、PM10颗粒物中正构烷烃主要来自于人为污染排放.
The n-alkanes in PM2.5 , PMlo airborne particles in autumn at five sampling sites in Ordos, of Inner Mongolia were determined by gas chromatography-mass spectrometry. Molecular geochemical parameters such as Cmax,CPI,Cn（wax） were used to preliminarily identify the pollutant sources and to determine the n-alkanes pollution conditions in one residential area, two industrial areas and two clean areas. The results suggested that the pollutant source of n-alkanes of PM2.5, PM 10 airborne particles in autumn over Ordos was complex, and the airborne particles in each functional area were polluted to different extents. In general, the n-alkanes pollution in residential and industrial areas which had the same pollution conditions was more serious than that of clean areas. In Ordos, the meteorological factors, especially the wind direction, had a strong influence on the pollution condition of nalkanes components. The n-alkanes in PM2.5 , PM1o airborne particles over urban areas mainly came from anthropogenic sources, which were also supported by other studies.
出处
《环境科学学报》
CAS
CSCD
北大核心
2007年第11期1915-1923,共9页
Acta Scientiae Circumstantiae
基金
教育部高等学校博士学科点专项科研基金项目(No.20030425007)~~
