Rusmana, Mochamad Hafiz Ghozali, and Triastuti Sulistyaningsih. “Preparation of Magnetite-Tannin Guava Leaves As Pb(II) Adsorbent”. Indonesian Journal of Chemistry and Environment 4, no. 2 (March 10, 2022): 39–48. Accessed May 10, 2025. https://journal.uny.ac.id/index.php/ijoce/article/view/48400.