Resumen:
A heterogeneous photo-Fenton process was
applied to treat aqueous solutions of indigo blue and
textile wastewater using an iron-modified clay (Mt-Fe)
and a copper-modified carbon (AC-Cu) as catalysts, the
UV radiation source was the sunlight collected by a
compound parabolic concentrator (CPC-2D). The treatments
were conducted at pH 7.0 and 6.8 for the aqueous
solutions and the textile wastewater, respectively, and
different hydrogen peroxide concentrations and catalyst
quantities were evaluated. The concentration of UV-A
radiation collected by the CPC-2D was 54.29 ± 0.71
W/m2, with an applied energy of 97.36 kJ from the
concentrator device. The indigo blue removal efficiencies
for Mt-Fe and AC-Cu were 98% (3 h) and 99%
(1.5 h), respectively, using 1.5 g of catalyst, 0.5 M of
H2O2, and UV radiation. The color removal efficiency
in the textile wastewater was 93% after 4 h of treatment
using 1.5 g ofAC-Cu, 0.5MofH2O2, and UVradiation.
The removal of dye and color was improved by using
AC-Cu and UV radiation for both systems (the aqueous
solutions and the textile wastewater), showing that Cu
has an important catalytic activity. IR spectra showed a
change after the oxidation of organic matter by heterogeneous
photo-Fenton process, and the application of
the UV radiation collected by CPC-2D played an important
role in the heterogeneous photo-Fenton process.