Agipa, Ade I., and Muhamad F. Muarif. “Phospate Release Study on Silica Gel and Amino Silica Hybrid Sorbent from Lapindo Mud”. Jurnal Akademika Kimia 11, no. 2 (May 30, 2022): 83–90. Accessed May 5, 2024. https://jurnal.fkip.untad.ac.id/index.php/jak/article/view/2089.