Preliminary studies on the source of PM_(10) aerosol particles in the atmosphere of Shanghai City by analyzing single aerosol particles

摘要

To identify the origin of PM_(10) (particulate matter with aerodynamic diameter equal to or less than 10 μm) in the atmosphere of Shanghai City, single PM_(10) particles from two environmental monitor locations and six pollution emitter sources were measured by scanning nuclear microprobe techniques. Every PM_(10) particle is characterized by its micro-PIXE spectrum. The strategy of micro-PIXE spectra combined with the pattern recognition technique is applied to identify original sources of measured PM_(10) particles. The results of this investigation show that the most of the measured PM_(10) particles are derived from building construction sites, cement factories, vehicle exhaust, coal boilers and steel mills.