In the present work advanced oxidation process, photo-Fenton (UV/H2O2/Fe+2) system, for treatment of wastewater contaminated with oil was investigated. The reaction influenced by input concentration hydrogen peroxide H2O2, initial amount iron catalyst Fe+2, pH, temperature and in wastewater. removal efficiency system UV/ H2O2/Fe+2 at optimal conditions dosage (H2O2 = 400mg/L, Fe+2 40mg/L, pH=3,...