Title : Degradation of non-steroidal drug under solar irradiation In the presence of Nickelate nanopowders
To optimize water purification and wastewater treatment by heterogeneous photocatalysis we utilize a NiFe2 O4 or as a catalyst and solar irradiation as a source of energy. In this concept an organic substance present in many industrial effluents was chosen: naproxen ((S)-6-methoxy-α-methyl-2-naphthaleneacetic acid or 2-(6- methoxynaphthalenyl) propanoic) a nonsteroidal anti-inflammatory drug. The main objective of this study is to degrade naproxen by an iron and nickel catalyst, the degradation of this organic pollutant by nickel ferrite has been studied in a heterogeneous aqueous medium, with the study of the various factors influencing the photo catalyzes thus: the material concentration and the acidity of the medium. The photocatalytic activity was followed by HPLC-UV and UV-Vis spectroscopy. A first order kinetic model appropriately fitted the experimental data. The degradation of naproxen was also studied in the presence of H2 O2 as well as in an aqueous solution. The new hetero-system NiFe2 O4 /oxalic acid is also discussed. The fastest naproxen degradation was obtained with NiFe2 O4 / H2 O2 . In a first-place, we detailed the characteristics of the material NiFe2 O4 which was synthesized by the sol-gel methods, using various analytical techniques: visible UV spectrophotometry, X-ray diffraction, FTIR, cyclic voltammetry, luminescent discharge optical emission spectroscopy. Keywords: Naproxen, Nickelate, photocatalysis, Irradiation.