Khoiroh, Lilik Miftahul, et al. “Adsorptive Performance of Gelatin-Hematite Composite Synthesized from Iron Lathe Waste Using Guava Leaf Extract for Pb(II) Removal from Aqueous Solutions”. Al Kimiya: Jurnal Ilmu Kimia Dan Terapan, vol. 12, no. 1, June 2025, pp. 26-34, doi:10.15575/ak.v12i1.40817.