Estimation of the level of some heavy metals in the treated wastewater returned to the Diyala River from the Rustamiya plant in Baghdad. cbej [Internet]. 2023 Jan. 12 [cited 2025 Apr. 20];18(75):221-35. Available from: https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/9230