title: Metallic components of traffic-induced urban aerosol, their spatial variation, and source apportionment.
abstract: This study proposes a practical method to estimate elemental composition and distribution in order to attribute source and quantify impacts of aerosol particles at an urban region in Kolkata, India. Twelve-hour total particulates were collected in winter (2005-2006) and analyzed by energy-dispersive X-ray fluorescence technique to determine multi-elemental composition, especially trace metals. The aerosols consist of various elements including K, Ca, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Se, and Pb which exhibit significant concentration at various sites (p < 0.05). The concentration of different metallic elements were found in the order of Zn > Pb > Ni > Cu > Cr > Co. Statistical multivariate analysis and correlation matrix analyses were performed for factor identification and consequent source apportionment. Contour profiles demonstrate spatial variation of elemental compositions indicating possible source contribution along with meteorological influences. Spatial differences were clearly most significant for Zn, Ni, Pb, and Cu reflecting the importance of anthropogenic inputs, primarily from automobile sources.
authors.affiliation: Department of Environmental Science, University of Kalyani, Kalyani, West Bengal, India. sandeepk6@rediffmail.com
authors.forename: Sandeep
authors.initials: S
authors.lastname: Kar
authors.forename: Jyoti Prakash
authors.initials: JP
authors.lastname: Maity
authors.forename: Alok Chandra
authors.initials: AC
authors.lastname: Samal
authors.forename: Subhas Chandra
authors.initials: SC
authors.lastname: Santra
mesh_terms: D000336:Aerosols / Q000032:analysis / Q000737:chemistry*; D000393:Air Pollutants / Q000032:analysis* / Q000737:chemistry; D000397:Air Pollution / Q000706:statistics & numerical data; D001272:Atmosphere / Q000737:chemistry; D002947:Cities; D004784:Environmental Monitoring; D008670:Metals / Q000032:analysis* / Q000737:chemistry; D015999:Multivariate Analysis; D014131:Trace Elements / Q000032:analysis
chemical_list: D000336:Aerosols; D000393:Air Pollutants; D008670:Metals; D014131:Trace Elements
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