Field Study into the Influence of Polluted Urban Environment on Aerosol Number Concentrations in Al-Ramadi City of Iraq

Abstract

The size-separated number concentrations of aerosols ranging from 0.3 to 25 μm were observed by laser particle counter in two sites one in a residential and commercial area with narrow Streets and heavy vehicular trafficand with huge old Factories, and the other in a residential area with lower traffic density and without Industries or commercial areas for the period from 4/11 to 23/12/2010 at a rate of 17sample/day and 34 sample/ hour of total measured days. Daily variation of aerosol number concentrations in urban area indicate a high significant for fine particles at night/morning of day and lowerly at afternoon while for coarse particles are decrease at night time and increase at day time.The measured mean of aerosol number concentration for six size channels (0.3, 0.5, 1.0, 5.0, 10.0 and 25.0 μm) was 65378961,