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Chemical Characterization of Ambient Pm10 Aerosol in a Steel City, Rourkela, India

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Author Affiliations

  • 1 Department of Civil Engineering, National Institue of Technology, Roukela-769008, Odisha, INDIA

Res. J. Recent Sci., Volume 2, Issue (1), Pages 32-38, January,2 (2013)

Abstract

A comprehensive study for ambient particulate air pollution was carried out between January 2011 and December 2011 in a steel city, Rourkela to investigate the PM10 aerosol mass concentration and its major metallic and anionic characterization. The 8 hourly average concentration of PM10 varied from 80.88µg/m3 to 225.93µg/m3. Major heavy metals obtained are iron (102.14 ng/m3), aluminium (50.53 ng/m3) and zinc (41.90 ng/m3), while sulphate (1920 ng/m3) dominates the anionic species. Both heavy metals and anions followed the same seasonal trend as PM10 showing a lower concentration during summer and monsoon and higher values during winter and spring. These seasonal variations can be explained by the nature of sources, climatic characteristics of the city and anthropogenic activities near monitoring sites. Spearman rank correlation study was performed between PM10 and its major chemical constituents. Ambient particulate iron of the steel city has obtained inverse spearman rank correlation with Ni, Zn, Cu and Al.

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