|
Lanzhou City, an important industrial city in the northwest region , industrial production and the unique geographical environment resulting in Lanzhou City air pollution is very serious . Atmospheric particulate matter as the main component of air pollution , has been the focus of attention , analysis of the composition of atmospheric particulate matter is the basis of analysis of the atmospheric particulate matter pollution characteristics and sources of pollution . Atmospheric particulate matter , however , the composition of the sample complex and less, and therefore neither require multi-element analysis , but also require high sensitivity, ordinary chemical methods can not be done , only with nuclear physics experiments analytical tools used in this study ion beam analysis and X- ray fluorescence analysis two methods , the sample of particles of the two analysis results of the analysis and compared , the PESA analysis sample film of particulate matter in the sample H elements to carry out a preliminary exploration . This study in January 2011 in Lanzhou City , Western Areas and suburbs Yuzhong County PM2.5 and PM10 particulate matter sampling , and sample PIXE analysis and SR - XRF analysis , Lanzhou City, the atmosphere pollution evaluation results show that the Lanzhou City atmospheric Aerosol and PM10 concentrations exceed national secondary standard limits , particulate matter S , NI , Cr , Zn , Pb , and other elements enrichment , from man-made pollution , Ni, Zn , Pb , and other elements more likely to be enriched in PM2.5 particles .
|