Ali, Safaa Abdalrasool. “Biosorption of Chromium Ions by Using Black Tea Leaves Waste and the Effect of Some Parameters on the Removal of Ions”. Iraqi journal of biotechnology 13, no. 2 (April 18, 2019). Accessed September 25, 2026. https://jige.uobaghdad.edu.iq/index.php/IJB/article/view/274.