TY - JOUR AU - MAMMERI, L AU - SEHILI, T AU - REMACHE, W AU - BELAIDI, S PY - 2014/07/01 Y2 - 2024/03/29 TI - NATURAL IRON OXIDE AS A HETEROGENEOUS PHOTO-FENTON-LIKE CATALYST FOR THE DEGRADATION OF 1-NAPHTHOL UNDER ARTIFICIAL AND SOLAR LIGHT JF - Sciences & Technology. A, exactes sciences JA - S&TA VL - 0 IS - 39 SE - DO - UR - https://revue.umc.edu.dz/a/article/view/604 SP - 91-97 AB - A heterogeneous photo-Fenton-like degradation process of 1-naphthol (1-NP) promoted by natural iron oxide (NIO) in the presence of H<sub>2</sub>O<sub>2</sub> was studied under artificial (365 nm) and solar irradiation. This is an important reaction for the environment since both H<sub>2</sub>O<sub>2</sub> and iron oxides are common constituents of natural waters. Furthermore, iron oxides function as catalysts in chemical oxidation processes used with H<sub>2</sub>O<sub>2</sub> for treatment of contaminated waters. The NIO used in this study was characterized by X-ray diffraction (XRD), X-ray fluorescence and Brunauer–Emmett–Teller (BET) methods. The results show that the NIO is a composite material that contains predominantly crystalline hematite particales (Fe<sub>2</sub>O<sub>3</sub>). The Fe<sub>2</sub>O<sub>3 </sub>in NIO was able to initiate the Fenton-like and photo-Fenton-like reactions. The effects of initial pH, catalyst dosage, H<sub>2</sub>O<sub>2</sub> concentration and the wavelength of the light source (UV and solar) on the photodegradation of 1-NP were investigated. The optimal content of the NIO was 1 g L<sup>-1</sup> and the optimal H<sub>2</sub>O<sub>2</sub> concentration was 10 mM. The degradation could occur efficiently over a wide pH range of 3-8.3. Furthermore, an important effect of light was observed. The photo-oxidation of 1-NP in NIO-H<sub>2</sub>O<sub>2</sub> system under solar light was significantly accelerated in comparison with artificial irradiation at 365 nm. ER -