Assessment of some heavy metals and study some physical and chemical characteristics of drinking water in the central water purification station, Samarra city, Iraq

This research includes investigation of some physical and chemical characteristics (Temperature, Electrical conductivity ,TDS and pH and Total hardness and chloride ion and some metals) of the central station for drinking water purification in Samarra district within Salah al-Din governorate during the month of September,2020 in.addition to estimating some heavy elements using flame atomic absorption technique depending on the method of concentrating the original samples by evaporating water to detect the lowest concentration of the elements present, as well as direct decomposition of the original samples . The results of the study showed that most the studied physical and chemical characteristics were within the international and Iraqi standards for drinking, as the highest pH value was recorded at 8.1, while the highest value of total dissolved salts was recorded at 273 mg/L and the highest conductivity value was 420 µS/cm and the highest value for chloride concentration was 42 mg/L. The highest value of total hardness was recorded at 288 mg/L. As for the alkaline elements, the highest concentration of sodium was recorded at 56 mg/L, calcium 76 mg/L and potassium 2 mg/L. The highest concentrations of heavy elements were also recorded in the direct analysis of zinc, 0.5 mg/L, and iron 0.42 mg/L. The concentrations of cadmium, copper and lead were