“Toxic heavy metals removal using a hydroxyapatite and hydroxyethyl cellulose modified with a new Gum Arabi”, Indonesian J. Sci. Technol, vol. 6, no. 1, pp. 41–64, Nov. 2023, Accessed: Sep. 26, 2025. [Online]. Available: https://ejournal.kjpupi.id/index.php/ijost/article/view/54