Abdulrazzaq Rashid, Sarmad, and Wadood Taher Mohammed. 2026. “Optimization and High-Efficiency Photocatalytic Degradation of Petroleum Refinery Wastewater using SiO₂/TiO₂ Nanocomposite under UV Irradiation”. Applied Science and Engineering Progress 19 (4):8058. https://doi.org/10.14416/j.asep.2026.04.011.