Heterogeneous Fenton like degradation of olive Mill wastewater using ozone in the presence of BiFeO3 photocatalyst

Hamida Iboukhoulef (1) , Rachida Douani (1) , Abdeltif Amrane (2) , Ahcene Chaouchi (1) , Abdelhamid Elias (1)

1 UMMTO - Université Mouloud Mammeri [Tizi Ouzou]
2 ISCR - Institut des Sciences Chimiques de Rennes

The possibility of coupling a physicochemical treatment (ozonation) with a heterogeneous Fenton-like using BiFeO3 nanocatalyst for the treatment of olive mill wastewaters (OMW) was investigated. BiFeO3 was successfully synthetized by sol-gel method and structural properties were characterized by X-ray (DRX), scanning electron microscope (SEM), Fourier Transform Infrared Spectroscopy FTIR and UV-vis diffuse reflectance spectroscopy. Different degradation systems were considered alone or in combination Ozone alone, BiFeO3 alone, O-3/BiFeO3, O-3/H2O2, O-3/H2O2/BiFeO3 and O-3/BiFeO3/S2O82-. Compared to the other systems, the degradation by O-3/BiFeO3/S2O82- in alkaline conditions appeared to be the most efficient, allowing to reach 82.9% and 98.0% reduction of the phenolic compounds and the COD respectively. High stability and reusability of the BiFeO3 particles was shown through four successive oxidation batches, confirming the promising performances of the O-3/BiFeO3/S2O82- system.

Keywords: Olive mill wastewater (OMW); Advanced oxidation processes (AOP); Ozonation; BiPeO(3); Persulfate; Treatment; Phenolic compounds; COD

Domains: Chemical Sciences

Hamida Iboukhoulef, Rachida Douani, Abdeltif Amrane, Ahcene Chaouchi, Abdelhamid Elias. Heterogeneous Fenton like degradation of olive Mill wastewater using ozone in the presence of BiFeO3 photocatalyst. Journal of Photochemistry and Photobiology A: Chemistry, 2019, 383, ⟨10.1016/j.jphotochem.2019.112012⟩. ⟨hal-02359982⟩