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Recebido em 18/1/06; aceito em 15/1/07; publicado na web em 17/7/07 APPLICATION OF ARTIFICIAL AND SOLAR UV RADIATION IN THE PHOTOCATALYTIC TREATMENT OF A TANNERY EFFLUENT. Tannery effluents are very dangerous for the environment since they contain large amounts of dangerous and biorecalcitrant contaminants (organic matter and Cr(VI)). This paper reports the efficiency of heterogeneous photocatalysis, based on the application of solar and artificial radiation, furnished by UV lamps, using TiO 2doi:10.1590/s0100-40422007000500006 fatcat:h5q7fdmsjrdptd5ts5vtflooge