Abstract
Samples of airborne particulate matter collected in Birmingham, U.K., Coimbra, Portugal and Lahore, Pakistan were analyzed for a wide range of metallic constituents, black carbon and organic carbon and soluble ions. A receptor modelling study was conducted for data from each city using Principal Component Factor Analysis followed by multi-linear regression analysis to provide quantitative insights into the sources of specific chemical components and total particulate matter in the three cities. A detailed intercomparison into the source attributions for lead and for total particulate matter/total suspended particulates are presented.