Sipayung, R. et al. 2026. Transformation of Agricultural Waste into Silica–Cellulose Microsponge Adsorbent for Optimization of Waste Cooking Oil as Biodiesel Feedstock. Jurnal Ilmiah Teknik Kimia. 10, 1 (Jan. 2026), 34–42. DOI:https://doi.org/10.32493/jitk.v10i1.54342.