المجلة الدولية للعلوم والتقنية

The aim of this study is to perform measurements of chemical and physical properties which include the determination of pH, electrical conductivity, total dissolved solids (TDS), and essential chemical components of water i.e. (( calcium, magnesium, sodium, potassium, bicarbonate, sulfate and chloride)) furthermore the measurement of the concentration heavy metals ((Fe, Cu, Zn, Cd, Pb)), by using chemical and instrumental methods i.e Gravimetric, titration methods and also by using instruments such as ((Spectrophotometery, flame photometer, flame emission and absorption Spectrophotometery. The results of the analysis for this study shows that : 1- Chemical and physical properties of rainwater ware found within the international standard specification with the exception of two regions, namely Merghib and Sellen area, for the increasing of cadmium concentration above the allowed limit, this is mainly due to: I. some of its compounds which ascended from cement factory in the form of gases and dust in the Merghib area. II. dissolving phosphate fertilizers in the earth in the form of waste products and these products have the ability to dissolve in the rainwater before reaching the collecting wells in Sellen area. 2- The number of milliequivalents of calcium was found more than the milliequivalents of magnesium in rainwater samples, the ratio of calcium and magnesium are between (40-50%) of the total number of milliequivalents of the cations in most of the samples, in the same time bicarbonate, sulfate and chloride represent (>50%,<30%,<45%) respectively from the total number of milliequivalents of anions for most of the rainwater samples which where collected in all regions of study in Khomes city and surroundings.It was found that all the samples are suitable for drinking axcept two regions i.e Merghib and Sellen area.