Electrochimica Acta,
Journal Year:
2023,
Volume and Issue:
442, P. 141905 - 141905
Published: Jan. 16, 2023
The
objective
of
this
study
was
to
evaluate
the
performance
Photo-Fenton
(PF)
and
Electro-Fenton
(EF)
processes
find
best
option
for
removal
pharmaceutical
compounds
in
a
real
urban
effluent
wastewater
treated
by
chemically-enhanced
primary
treatment
(CEPT).
In
both
used
iron
residual
(average
2.4
mg
L−1)
resulting
from
CEPT
avoiding
further
salts
addition.
Central
composite
designs
(CCD)
with
response
surface
methodology
(RSM)
were
applied
select
operational
conditions.
Humic
acid
(HA)
chelating
agent
PF
process,
where
Fe3+:HA
molar
ratios
H2O2
concentrations
factors.
While
current
density
electrolysis
time
factors
EF
process.
conditions
selected
evaluating
1:6.8
ratio
100
L−1
PF,
80
mA
cm−2
min
EF.
evaluated
Boron
Doped
Diamond
electrode
anode
cathode
(BDD/BDD
cell)
without
addition
supporting
electrolyte.
efficiencies
between
24.2%
56%
gabapentin,
ibuprofen,
naproxen,
pentoxifylline,
venlafaxine.
Compounds
such
as
carbamazepine
fenofibric
increased
their
concentration
after
This
increase
related
enzymatic
cleavage
glucuronides
possible
presence
•OH
radical
scavengers
that
decreased
process
efficiency.
By
contrast,
showed
an
average
efficiency
53.3%
99.9%
all
identified
compounds,
treating
wastewater.
These
results
could
be
synergic
effect
homogeneous
BDD(•OH)
contributed
improving
oxidation
contaminants.
electrical
energy
per
order
(EEO)
determined
values
11.5
144.9
kWh
log−1
m−3,
suggesting
need
apply
other
preliminary
treatments
reduce
(i.e.,
coupled
biological
process).
