Windiastuti RT, Santoso T. Determination of Optimum pH and Contact Time from the Adsorption Process of Cu(II) Ions by Corn Cob (Zea mays) Biomass. J. Akademika Kimia [Internet]. 2020 Nov. 30 [cited 2024 May 2];9(4):224-9. Available from: http://jurnal.fkip.untad.ac.id/index.php/jak/article/view/600