Nabillah, A. et al. 2026. The Effectiveness of Coagulation-Flocculation and Filtration-Adsorption Combination Using Anionic Surfactant for COD Removal on Contaminated Well Water. Jurnal Ilmiah Teknik Kimia. 10, 2 (Jul. 2026), 152–160. DOI:https://doi.org/10.32493/jitk.v10i2.61040.