O. Edmund, “Removal of Cadmium II, Chromium II and Copper II from Aqueous Solution by Adsorption on Palm Kernel Shell Carbon”, IJRTI, vol. 2, no. 1, pp. 44–51, Apr. 2025, Accessed: Sep. 03, 2026. [Online]. Available: https://www.ijrti.com.ng/index.php/home/article/view/56