%0 Journal Article 
%A RIOJA, NEREA
%A ZORITA, SAIOA
%A PEÑAS, FRANCISCO JAVIER
%T Effect of water matrix on photocatalytic degradation and general kinetic modeling
%D 2016
* ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
%X 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.
%@ 0926-3373
%K Clofibric acid photodegradation
%K Inorganic salts
%K Organic matter
%K Environmental water
%K Kinetic modeling
doi 10.1016/j.apcatb.2015.06.038
%U http://hdl.handle.net/11556/304
%~ GOEDOC, SUB GOETTINGEN