Dalagan, Juliet Q., and Romelisa A. Ibale. 2016. “Adsorption Behavior of Heavy Metal Ions (Cr3+, Pb2+ and Cu2+) Into Magnetite-Graphite Oxide-Diatomite”. Asia Pacific Higher Education Research Journal (APHERJ) 3 (1). https://po.pnuresearchportal.org/ejournal/index.php/apherj/article/view/211.