Increased heavy metal concentrations in the soils near electric power generators in Samarra city (Iraq)

Abstract

Purpose. To determine the concentration levels of various heavy metals and carbon in the soils of four Samarra City areas that are close to pollution sources (electric power generators). Methodology. A pollution source is sampled at a distance of 5, 10, 15, and 20 meters. The concentrations of iron (Fe), lead (Pb), copper (Cu), cadmium (Cd) metals, as well as carbon, are then determined. Findings. It has been determined that the iron and copper concentrations are within the permissible limits prescribed by the United States Environmental Protection Agency. However, the soils contaminated with cadmium and lead in concentration exceed the permissible limits. The metal concentrations increase with distance from the source. The metal concentration is low at a distance of 5 m from the pollution source, then it increases at a greater distance. Moreover, metals are found in soils at a distance of 10 m, then their concentration further increases at a distance up to 20 m. Concentrations of metal and carbon at a distance of 20m are the highest. Originality. This study determines the concentration level of heavy metal contaminants, as well as the impact of electric power generating waste on the metropolis. According to the study, the concentration of these components increases around electric power producers. Practical value. The concentrations of heavy metals in soils increase as the distance from the source of pollution increases.