Water Pollution in Cobalt and Nickel by the Effect of Adding Urban Waste in Al-Diwaniyah River / Iraq

Abstract

This study was conducted in Al-Diwaniyah Governorate, Iraq, across four seasons with the intention of determining the impact of introducing liquid urban waste (including sewage, waste water, factory, and sewer water) on the content of cobalt and nickel in river water. At each location and during each of the following four seasons: summer in July, 2021; autumn in October, 2021; winter in January, 2022; and spring in April, 2022; for the following three locations: The first site was positioned at the entrance to Diwaniyah (Saniaa), which represents the control treatment as it is located before to the pollution outputs. The numerous sources of pollution that are discharged into the river, as well as the second location in the city center (the neighborhood of Refaat), and the third location in the Al-Sidair region, which is the final location in the city of Diwaniyah following the cessation of all pollution discharges into the river. The third, where the highest significant concentration of cobalt was 0.2400 μg l-1 in the summer, the third site, where it exceeded the limits recommended by the World Health Organization (WHO), and the lowest concentration was 0.0033 μg l-1 In the winter, the first site, while the highest concentration of Nickel was 0.382 μg l-1 in the summer, the third site, thus exceeding the critical limits of the World Health Organization (WHO), and its lowest concentration was 0.022 μg l-1 in the winter, the first site.