الفهرس 
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Abstract
In this study, the deposited particulate matter (dust fall) was collected in an urban and industrial city, Port Said, Egypt, from March 2018 to February 2019, and analyzed for water-soluble ions. In addition, suspended particulate matter (SPM) was collected from March to August 2018, and the filtrate samples were analyzed for heavy metal concentrations using ICP-OES. The depositional rates of dust fall and SPM in sampling sites were compared with meteorological (e.g., temperature, wind speed and direction) and satellite-based datasets. GIS-based interpolated maps were delineated for concentrations of major ions and heavy metals to determine their spatial and temporal variations within sampling sites. The analyzed anions (meq/L) have the decreasing order: SO42− (5.86) > Cl− (4.54) > HCO3− (1.57) > NO3- (0.10) and Ca2+ (4.20) > Na+ (4.00) > Mg2+ (2.10) > K+ (1.51) > NH4 + (0.37) for cations. Low ratios of NO3− /SO42− indicate the predominance of stationary pollution sources in Port Said city. The SPM associated heavy metals (μg/m3) have the decreasing order: Fe (2.7) > Cr (1.64) > Ni (1.35) > Pb (1.3) > Cd (0.17). The mean concentration of SPM (258 μg/m3) exceeds the European (150 μg/m3) and Egyptian (230 μg/m3) air quality standards. Statistically, Cd and Cr were positively correlated with Fe (R2 = 0.86), while Pb and Ni were not. Overall, the study findings show that high rates of dust fall and heavy metals in Port Said’s atmosphere can be attributed to urbanization (construction sites), sea-salt spray, and anthropogenic sources (e.g., industrial and vehicle emissions).