Abstract:

The nuclear techniques of particle induced X-ray emission (PIXE), particle induced gamma ray emission (PIGE), Rutherford backscattering (RBS) and particle elastic scattering (PESA) have been used to quantitatively determine more than 20 different elemental species from hydrogen to lead in PM2.5 air filters collected between 2001 and 2005 in Manila and Hanoi. These filters were obtained for 24 hours every Sunday and Wednesday through the 5 year study period. The extensive data set obtained allows principal components analysis (PCA) and the new techniques of positive matrix factorisation (PMF) to used to determine both source fingerprints and quantitative daily source contributions to the total fine particulate mass (PM2.5) loadings at the two sites.

This paper will discuss the methods used and provide new data on both natural and anthropogenic fine particle source contributions such as motor vehicles, biomass burning, windblown soils, secondary sulfates, seaspray and industry in the Asian region.

Presentation: http://www.cleanairnet.org/baq2006/1757/docs/SW23_3.ppt