Abstract
AbstractThe aim of this study was to assess the levels of metals in particulate matter measuring less than 10 μm (PM10) aerosols in ambient air at a site in central Delhi. A total of seven metals were analyzed in PM10 aerosol samples during the postmonsoon period in 2009. The average levels of metals were estimated in the order K>Zn>Mg>Fe>Mn>Cu>Cd. The study also covered the metal accumulation due to fireworks on Diwali festival. A comparison of ambient levels of metal accumulation with the Diwali period revealed that the festival Diwali is a source of severe air pollution when the levels of metals increased by many folds as compared with normal ambient levels. Significant amounts of metals are emitted into the atmosphere by burning of crackers and sparkles on the Diwali day (DD). The contribution of K was the highest during all DDs with its maximum 88% emission on the main DD. Remarkable increase was noticed for K (9.4 times) and Mg (6.1 times) on the DD over the pre-Diwali normal day, whereas for the pr...
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