Source Apportionment of PM2.5 in Ambient Concentration in Lahore, Pakistan

WAJIH UR REHMAN, COMSATS University Islamabad

     Abstract Number: 65
     Working Group: Source Apportionment

Abstract
A source apportionment study using Chemical Mass Balance (CMB) has been carried out to improve upon the results of a previous study. The earlier study used Positive Matrix Factorization (PMF) for source apportionment for a receptor location in Lahore, Pakistan. It has been found that great improvement in source apportionment results are obtained if our method is used for the same data as provided in previous literature. We were able to classify more sources and provide more meaningful and realistic results and characterize more components of air pollutants nuisance to the public in Lahore, Pakistan.

In our study, we were able to characterize 7 distinct sources of interest to air pollution controls (as opposed to only 5 in previous study). Additionally, diurnal variation in data was also observed as Day, Evening and Night time source apportionment results, which were not explored in previous study.