01976naa a2200217 a 450000100080000000500110000800800410001902400270006010000190008724501490010626000090025550000220026452013010028665000200158765000130160765000120162065300130163270000170164570000280166277300680169020116782015-03-18       2014    bl uuuu     u00u1 u    #d7 a10.1002/jctb.43752DOI1 aLUIZ, D. de B.  aKinetics of photocatalytic reduction of nitrate in synthetic and real effluent using TiO2 doped with Zn as photocatalyst.h[electronic resource]  c2014  aPublished online.  aBACKGROUND: The main industries that contribute to the presence of nitrate in water are the production of fertilizers, explosives, pulp and paper, and food products. Nitrate removal by filtration and advanced biological processes can be costly and generate unwantedwaste. The catalytic photoreduction of nitrate toN2 has recently been proposed.However, most studies do not address the kinetic aspects of the reactions. RESULTS: The kinetics model of Langmuir?Hinshelwood for nitrate photoreduction in the presence of formic acid in aqueous solution and in real industrial effluent using ZnO-TiO2 as the photocatalyst was proposed and adjusted to the experimental data obtained for a synthetic effluent (R2 = 0.991; apparent constant of the reaction was k′ R = 0.226 mg N (mg C min)−1). After adaptation the modelwas used to predict the reaction time required to remove a given concentration of nitrate fromthe effluent produced by a slaughterhouse (k′′ R = k′ R/2). CONCLUSION: The proposed kinetic model can be applied to any type of effluent, promoting the possibility of production of high quality reusewater, reduction of freshwater consumption, reduction of discharge of pollutants discharged inwater bodies, hence promoting the preservation of the environment.  aDenitrification  aKinetics  aNitrato  aNitratos1 aJOSÉ, H. J.1 aMOREIRA, R. de F. P. M.  tJournal of Chemical Technology and Biotechnology, Malden, 2014.