Resumo (PT):
Abstract (EN):
In this work, oxidation with a Fenton-like process of a dye solution was carried out in a packed-bed
reactor. Activated carbon Norit RX 3 Extra was impregnated with ferrous sulfate and used as catalyst
(7 wt.% of iron). The effect of the main operating conditions in the Chicago Sky Blue (CSB) degradation
was analyzed. It was found that the increase in temperature leads to a higher removal of the dye and
an increased mineralization. However, it also increases the iron leaching, but the values observed were
below 0.4 ppm (thus, far below European Union limits). It was possible to reach, at steady-state, a dye
conversion of 88%, with a total organic carbon (TOC) removal of ca. 47%, being the reactor operated at
50 ◦C, pH 3, Wcat/Q = 4.1 g min mL−1 (Wcat is the mass of catalyst and Q the total feed flow rate) and a H2O2
feed concentration of 2.25 mM (for a CSB feed concentration of 0.012 mM). The same performance was
reached in three consecutive cycles.
Language:
English
Type (Professor's evaluation):
Scientific
Notes:
Publicação abrangida pelo Journal Citation Reports 2015
No. of pages:
8