RT Journal Article
T1 Effect of water matrix on photocatalytic degradation and general kinetic modeling
A1 RIOJA, NEREA
A1 ZORITA, SAIOA
A1 PEÑAS, FRANCISCO JAVIER
AB Photocatalysis employing TiO2 nanoparticles was studied to assess the effect of aqueous matrix nature in the degradation of clofibric acid (CFA) under UV-A radiation. Aeroxide TiO2-P25 at 0.50 g/L was the most effective catalyst among those tested, with a CFA degradation of 98.5% after 15 min. The CFA photodegradation in environmental waters (tap, mineral, river and recycled wastewater) and in the presence of inorganic (NaCl, FeCl3, FeCl2, AlCl3, CaCl2, Al-2(SO4)(3), Fe-2(SO4)(3), Na2SO4, NaHCO3, and Na2CO3) and organic compounds (humic acids, and a surfactant) commonly found in real waters was compared to that obtained in pure water. In general, the removal efficiency decreased with inorganic salts, especially with sulfates and carbonates (>70% deactivation), and also in environmental waters (>90%). A general kinetic model has been developed to describe the CFA photo degradation depending on the type and concentration of substances present in water. The first-order kinetic constants were estimated by defining a characteristic parameter for each ion species tested in the aqueous matrix. High correlation (R-2 >0.99 in most cases) was observed between experimental CFA concentrations and those predicted by the model.
YR 2016
FD 2016-01-01
LA eng
NO RIOJA , NEREA , ZORITA , SAIOA & PEÑAS , FRANCISCO JAVIER 2016 , ' Effect of water matrix on photocatalytic degradation and general kinetic modeling ' , unknown , vol. unknown , pp. 330-335 . https://doi.org/10.1016/j.apcatb.2015.06.038
NO Publisher Copyright: © 2015 Elsevier B.V.
DS TECNALIA Publications
RD 3 jul 2024