Windiastuti, Riska T., and Tri Santoso. “Determination of Optimum PH and Contact Time from the Adsorption Process of Cu(II) Ions by Corn Cob (Zea Mays) Biomass”. Jurnal Akademika Kimia 9, no. 4 (November 30, 2020): 224-229. Accessed July 20, 2025. https://jurnalfkipuntad.com/index.php/jak/article/view/600.