Introduction. In this paper, an experiment
made with the degradation of the Recoltive
red dye with titanium dioxide, peroxide and
phenton using the UV lamp as a medium,
is presented. The tests made involved the
variation of the quantities of these oxidants.
Objective. To compare the treatments with
titanium dioxide and phenton for colored
waste water. Materials and methods. The
equipment used consisted of a 41 cm x 25,5
cm x 20 cm glass bucket that contained
15L of sample; a MIGHTY PURE ultra
violet lamp 60 Hz and a pump that drives a
0,047 L/s flow. The dye was added in the
tank and then the concentration was 100
mg/L. The pH was continuously measured
in order to adjust it in 5,0.When phenton
and TiO2 were used, either acids or bases
were required to measure the pH values,
because they were more stable. Results.
The best combination to treat water from
textile industries with UV light lamp and
titanium dioxide is 100 mg/L of TiO2 and
2% v/v of H2O2. The test with the optimal
degradation of the color was that with
phenton, 30 mg/L of FeCl3 and 1% v/v
of H2O2. Conclusions. The use of advanced
oxidation processes such as photo catalysis
with TiO2 or photo phenton, had different
results concerning the reduction of the
dye´s degradation percentage and higher
reaction speeds. The photo phenton reaction
was the one with the best percentages and
reduction time periods (E13 with 30 mg/L
FeCl3 and 1% v/v of H2O2).
