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Chemical Characterization of Airborne Particulates of Kathmandu, Nepal

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Author Affiliations

  • 1Pulchowk Campus Institute of Engineering, Tribhuvan University, Kathmandu, NEPAL
  • 2Central Department of Chemistry, Tribhuvan University, Kirtipur, Kathmandu, NEPAL
  • 3Depart of Physics Norwegian University of Science and Technology, Trondheim, NORWAY
  • 4School of Urban and Environmental Engineering, University of Incheon, Incheon, SOUTH KOREA

Res.J.chem.sci., Volume 3, Issue (10), Pages 88-96, October,18 (2013)

Abstract

Particulate matters of different aerodynamic diameter were collected on 47mm quart filter using Omni frm Ambient air Sampler from 9th March 2010 to 28th April 2010.The collected particulate matter 24-h samples were analyzed for 13 nonionic and 9 ionic components. Black Carbon concentration was also monitored for the same duration using AE 31 Magee Scientific Aethalometer. The chemical analysis shows dominating concentration of silicon in all the samples followed by Na+ ,Fe, SO4 2-, Ca2+, NH4+ and Cl-with common radicals NO3 - ,NO2 -, K+ , Mg2+ and metals Ni, Pb, Al, Ag, Ti, V, Mn, Cd, Cr, Cu and Zn. Only four samples out of all the analyzed samples has shown the presence of F. PM10 with 105.16µg/m3 was the highest value of particulate matter while black carbon for the same duration was 12.97 µg/m3 .The variation of particulate matters for the observed period was from 105.16 - 56.47µg/m3 and that for black carbon 21.8 - 4.7µg/m3 . The present observation shows that major contributor in the particulate matter are derived from roadsuspension, vehicular emission and domestic activities. Irrespective to the nature of particulate matters of different aerodynamic diameter analyzed most of the ionic and metallic components are common in all the analyzed samples reflecting their common impact on human health.

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