The present study investigates the chemical composition of wet atmospheric precipitation over Damietta City-Egypt. Precipitation samples were collected through rainy event (October to February) during 2001-2002 and from 2005-2006 in ten sampling locations. The concentrations of the chemical constituents of water-soluble ions Inorganic cations (NH4+) and anions (NO3-, NO2-, SO42-, Cl- and CO32- were measured. Electric conductivity, pH and total dissolved solids of rainwater were also assessed. Results of the present study during 2005-2006 are almost similar to values observed during 2001-2002, excepting the concentration of NH4+ and SO42-. The mean value of the precipitation pH indicates that rainfall is alkaline. Among the cations and anions, SO42- deposition was maximum followed by CO32- and then NO3-, Cl-, NH4+ and NO2-. The results of the present study suggest that atmospheric precipitation is strongly modified due to various human activities, motor vehicles and furniture activities which are scattered all over the city.
M.I. El-Gammal, M.S. Ibrahim, Alia A. Shakour and R.Sh. El-Henawy, 2008. Precipitation Quality and Related Atmospheric Chemistry over the Greater Damietta Area-Egypt. Research Journal of Environmental Sciences, 2: 252-265.