tApplicability of the solar Fenton process for the treatment of a real refinery wastewater was investigated.A novel solar-reactor was used with the capability of automatic rotating against the sun, enabling maxi-mum utilization of direct and single reflective sunlight beams. The COD and TOC criteria were measuredto follow the pollutants removal. Results revealed optimal operating conditions of 694.7 mg/L hydro-gen peroxide, 67.3 mg/L ferrous salt and solution pH of 3.2. Under these conditions, COD and TOC were,respectively, decreased to 79.6 and 73.2 % after 180 min sunlight envision. For comparison, alternativeH2O2/ Fe2+, S2O2−8/ Fe2+, NaOCl / Fe2+, NaOCl, S2O2−8and H2O2processes, all activated with sunlight,were performed. The present pollutants were identified by means of the GC/MS headspace technique,showing significant removal of the majority of petroleum aliphatic and aromatic hydrocarbons and thatbiodegradability was feasible since BOD5/COD reached from 0.36 to 0.62. The process performance wascompared with the previously reported similar processes for treating specified pollutants and wastew-aters. High preference of the employed process using the particular solar-reactor was probed based ondifferent criteria. Meanwhile, the total operating costs was estimated to be quite low, compared to otherprocesses
