Abstract
Temporal variation in the concentration of particulate matter (PM) was monitored at an institutional and rural area of Lucknow. The concentration of coarse (PM10) and fine particulates (PM2.5) was found to be in the range of 134.14–387.64 (225.79±76.34), 108.47–233.38 (147.15±36.47) and 90.68–220.8 (136.19±37.08), 33.13–113.67 (83.47±24.73) μg/m3 at institutional and rural area, respectively. Average PM10 and PM2.5 concentration at both the locations were found to be beyond the permissible limits, that is 100, 60 μg/m3(National Ambient Air Quality Standards) and 150, 35 μg/m3 of (United State Environmental Protection Agency) for institutional and rural areas, respectively. Average PM2.5-to-PM10 ratio was found to be. 63±.11;. 57±.15 at institutional and rural area, respectively, which indicates the higher contribution of fine particulates in PM10. Further, the PM10 was subjected for trace metal characterisation in terms of Fe, Pb, Zn, Cd and Cu. Trace metal concentration (ng/m3) associated with PM10 at both the locations was found to be in the order of Fe (823.87) > Pb (198.67) > Zn (93.19) > Cd (88.10) > Cu (37.60). The Pearson correlation of trace metals associated with PM10 and meteorology showed significant correlation at P<.05 and P<.01 levels; which inferred that the PM and trace metals were originated from similar sources.
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