TSP aerosol source apportionment in the urban region of the Indian steel city, Rourkela--颗粒学报PARTICUOLOGY

Kavuri, N. C., Paul, K. K., & Roy, N. (2015). TSP aerosol source apportionment in the urban region of the Indian steel city, Rourkela. Particuology, 20, 124–133. https://doi.org/10.1016/j.partic.2014.07.006

TSP aerosol source apportionment in the urban region of the Indian steel city, Rourkela

Naga Chaitanya Kavuri, Kakoli Karar Paul^*, Nagendra Roy

Department of Civil Engineering, National Institute of Technology, Rourkela 769008, Odisha, India

10.1016/j.partic.2014.07.006

Volume 20, June 2015, Pages 124-133

Received 18 December 2013, Revised 8 July 2014, Accepted 9 July 2014, Available online 6 December 2014.

E-mail: kkpaul@nitrkl.ac.in; k_karar1@yahoo.co.in

Highlights

• Ambient TSP aerosols were characterized in urban areas of Rourkela.

• Significant seasonal variations were observed for TSP.

• Seasonal source apportionment was performed using chemical mass balance model CMB 8.2.

• Sensitivity tests were conducted for the removal of collinearity effects.

Abstract

Steel industries are a major contributor to aerosols in steel cities like Rourkela. We designed an air quality sampling program to characterize total suspended particulate (TSP) aerosol in urban areas of Rourkela and to identify their steel-related and other sources. Monitoring was carried out over 8 h, twice per week from January 2011 to December 2012. Metallic species of TSP aerosols were analyzed using an atomic absorption spectrophotometer; ionic species using the IS 3025 method; and carbonaceous species using a total organic carbon analyzer. Enrichment factor and Spearman's rank correlation analysis were carried out on compositional data. Significant seasonal variations were observed for TSP with totals in summer > spring > winter > monsoon. Low concentrations during monsoon reflected wet scavenging, while high concentrations during summer were related to wind turbulence and low humidity. The chemical mass balance model CMB8.2 was applied to apportion sources. Particles related to steel production, road dust, and soil were dominant in all seasons. A fertilizer plant was found to contribute particles in summer and monsoon. Wood combustion, diesel exhaust, and liquefied petroleum gas contributed significantly in spring and winter. While diesel exhaust, industrial manufacturing, solid waste burning, cement kilns, and construction were found to contribute to TSP at various times throughout the year.

Graphical abstract

Keywords

Aerosol; TSP; Enrichment factor analysis; Steel city; Chemical mass balance model

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