Characterization of dry deposition associated with fire in plastic scrap market of west Delhi

Abstract

Samples of dry deposition were collected at National Physical Laboratory during a fire incident occurred at Jwalapuri, a plastic scrap market located in west Delhi. About 2500 shops were gutted in this fire and almost 1 4 th of the city was affected by the plume. The collected samples were analyzed for Cl, NO 3, SO 4 and NH 4. pH and Electrical Conductance of the samples were also measured. Data showed that deposition of Cl, SO 4, NO 3 was significantly higher than the normal conditions as reported earlier. It was estimated that respectively 21, 11, 16 and 0.2 tones of Cl, SO 4, NO 3 and NH 4 were deposited by dry removal process during this fire incident.