Size characterization of particulate matter from a kerbside in a major metropolis in India

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PM10 and PM2.5 samples were collected from a kerbside at a traffic junction in a major metropolis of India during month of December 2005 and their concentrations were calculated. The Pm2.5 fraction in PM10 varied from 18.7 to 72.6%. Such a large variation was correlated with meteorological variables. The major contributors of PM2.5 to the sampling location were diesel and gasoline driven passenger vehicles exhaust emissions.