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Volume 6, 32-43, June 2003
ISSN 1438-7890
African Journal of Environmental Assessment and Management
Revue africaine de gestion et d’évaluation environnementales

Chemical Composition of Rainwater in Egypt


Daifullah, A. A. M. and A. A. Shakour


Rain event samples have been collected at 6-sites in Egypt for the period between 1987 and 2002. Concentrations of major anions (Cl-, NO3- and SO4 2-) and major cations (H+, Ca++ and NH4+) were determined and the FTIR of some rainwater samples were assigned. Data of 137 rain samples showed that the average pH was 7.09 0.39. These pH values are fairly similar for the others recorded in north Spain, Athens and Ankara but exceed the values recorded for many parts of the world. Sulphate and nitrate ions are significant compounds in rainfall over Egypt. Sulphates were mostly present as neutral or partially acidic compounds. Acidity in rainwater was mainly influenced by alkaline gases and basic particulate matters (mainly ammonia and calcium) emitted from both natural and anthropogenic sources.

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