Photocatalyst was TiO2 P25 (Degussa). Activated carbon
(AC) was prepared from sawdust of Tabebuia Pentaphyla
wood by physical activation [5] under CO2 flow at 800ºC
and sample was denoted as ACCO2-800. Samples were
characterized by BET surface area (SBET), Infrared (IR),
surface pH (pHPZC), and X-ray diffraction (XRD). Photocatalytic
tests were performed at 25ºC with 200mg TiO2 and
40mg AC under stirring in 200mL of 40ppm initial concentration
of phenol. Samples were maintained in the dark for
60min to complete adsorption at equilibrium prior UVirradiation
and then the suspension was irradiated. After
centrifugation aliquots were analyzed by UV-spectrophotometer
Perkin Elmer, Lambda. UV-Vis lamp of Metal Halide
was used for the photocatalytic tests. From 522.7W.m-2 of
total radiation of this lamp, 70.2W.m-2 corresponds to UV
radiation and about 452.5W.m-2 to the visible radiation. The
total radiation flux was about 1.44x1017photons