“Removal of Cu (II) and Zn (II) ions from wastewater by cassava (Manihot esculenta Cranz) waste biomass ” (2019) Frontiers of Agriculture and Food Technology, 10(1), pp. 22–26. Available at: https://kevinpage.org/index.php/FAFT/article/view/199 (Accessed: 28 October 2026).