Airborne fine particulate matter (PM2.5) at industrial,high- and low-density residential sites in a Nigerian megacity |
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| Authors: | Godwin Chigaekwu Ezeh Imoh Bassey Obioh Olabode Idowu Asubiojo Chinwe Azuka Onwudiegwu Christian Kouassi Nuviadenu Sulyman B Ayinla |
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| Institution: | 1. Atmospheric Research &2. Information Analysis Laboratory, Centre for Energy Research &3. Development, Obafemi Awolowo University, Ile-Ife, Nigeria;4. goddyich@yahoo.com;6. Institute of Physics and Ecology, Federal Capital Territory, Abuja, Nigeria;7. Department of Chemistry, Obafemi Awolowo University, Ile-Ife, Nigeria;8. African Institute for Science Policy and Innovations, Obafemi Awolowo University, Ile-Ife, Nigeria;9. Accelerator Research Laboratory, Atomic Energy Commission, Accra, Ghana;10. Lagos State Environmental Protection Agency, Alausa Ikeja, Nigeria |
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| Abstract: | AbstractAirborne particulate matter PM2.5 was collected in an industrial, a low-density, and a high-density residential area of Lagos from December 2010 to November 2011, and elemental composition was determined by proton-induced X-ray emission. Across the months, mass concentrations ranged from 13 to 237?µg?m?3, exceeding the World Health Organization guideline value of 10?µg?m?3. Data on 24 elements were obtained, with maximum values during Harmattan season months; source identification and apportionment studies by positive matrix factorization suggested that petroleum oil combustion (70%) was the major source of PM2.5 and could pose a great hazard to Lagos receptors. |
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| Keywords: | Airborne PM2 5 air pollution elemental composition source apportionment receptors |
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