Irawan, D.S., Alham, M., Sari, D.A.P. and Fadiilah, D. 2025. Optimizing Fly Ash and Cement Ratios for Immobilizing Lead and Arsenic in Liquid Hazardous Waste. Engineering, Technology & Applied Science Research. 15, 1 (Feb. 2025), 20500–20507. DOI:https://doi.org/10.48084/etasr.9507.