Air Quality Assessment at Industrial cum Residential Areas of Karachi City in | [International Journal of Economic and Environmental Geology • 2017]

Author(s):

1. Muhammad Kamran Khana: Department of Chemistry, University of Karachi, Pakistan

2. Sumayya Saieda: Department of Chemistry, University of Karachi, Pakistan

3. Shaikh Mohiuddin: Wadsworth Center, New York State Department of Health, Albany, New York, USA

4. Saiyada Shadiah Masood: Department of Chemistry, University of Karachi, Pakistan

5. Azhar Siddique: Qatar Environment and Energy Institute, Hamad bin Khalifa University, Qatar

6. Mirza Muzammil Hussain: Wadsworth Center, New York State Department of Health, Albany, New York, USA; Department of Environmental Health Sciences, School of Public Health, University at Albany, NY, USA

7. Haider Abbas Khwaja: Wadsworth Center, New York State Department of Health, Albany, New York, USA; Department of Environmental Health Sciences, School of Public Health, University at Albany, NY, USA

Abstract:

This study is illuminating the distinctiveness of Particulate matter having 2.5µm size (PM2.5) with water soluble ions like SO4-2, NO3- and Cl- along with carbonaceous aerosols (i.e. BCIR and BCUV) as well as elemental profile for the period December 2012 to January 2013 at residential cum industrial site to investigate the quality of air of the mega city Karachi. Twenty-six samples have been collected for 24-hours during the study period on PTFE samples. Mean concentration of PM2.5 is found to be 112µg/m3 which is much higher than the WHO guideline (i.e.25 µg/m3). Both, BCUV and BCIR, have high contents during the study period i.e. 3.85µg/m3 and 5.09µg/m3 mean values respectively. Na, Mg, Cl, K, Ti, Cr, Mn, Ni, Cu, Zn, Br, Rb, Sr, Zr, Er, Lu, Pb, W, Sn, Sb and Ce were also examined in elemental analysis from which Al, Si, S, Ca and Fe shows relatively higher concentrations among the targeted elements. Pearson's correlation shows that PM2.5 is significantly correlated with BC whereas SO4-2 and NO3- originate from similar sources. HYSPLIT backward air mass trajectories show that regional sources are contributing in high concentrations of fine particulates.

Page(s): 21-27

DOI: DOI not available

Published: Journal: International Journal of Economic and Environmental Geology, Volume: 8, Issue: 4, Year: 2017

Keywords:

anionic composition , HYSPLIT , PM2 , Elemental profile , black carbon

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