Catalysts,
Год журнала:
2024,
Номер
14(9), С. 591 - 591
Опубликована: Сен. 3, 2024
Textile
wastewater
containing
dyes
poses
significant
environmental
hazards.
Advanced
oxidative
processes,
especially
the
heterogeneous
photo-Fenton
process,
are
effective
in
degrading
a
wide
range
of
contaminants
due
to
high
conversion
rates
and
ease
catalyst
recovery.
This
study
evaluates
photodegradation
azo
Acid
Red
18
(AR18),
66
(AR66),
Orange
2
(OR2)
using
magnetite
as
catalyst.
The
magnetic
was
synthesized
via
hydrothermal
process
at
150
°C.
Experiments
were
conducted
room
temperature,
investigating
effect
dosage,
pH,
initial
concentrations
H2O2
AR18
dye.
Kinetic
thermodynamic
studies
performed
25,
40,
60
°C
for
three
(AR18,
AR66,
OR2)
dye
structures
on
degradation
efficiency
investigated.
At
25
0.33
mmolL−1
pH
3.0,
1.4
gL−1
mgL−1
under
UV
radiation
16.7
mWcm−2,
showed
62.3%
AR18,
79.6%
83.8%
OR2
180
min
reaction.
oxidation
these
conditions
is
spontaneous
endothermic.
pseudo-first-order
kinetic
constants
indicated
strong
temperature
dependence
with
an
order
reactivity
type
>
AR66
which
associated
molecular
size,
steric
hindrance,
aromatic
conjugation,
electrostatic
repulsion,
nature
acid–base
interactions
catalytic
surface.
Textile
wastewater
containing
dyes
pose
significant
environmental
hazards.
Advanced
oxidative
processes,
especially
the
heterogeneous
photo-Fenton
process,
are
effective
in
degrading
a
wide
range
of
contaminants
due
to
high
conversion
rates
and
ease
catalyst
recovery.
This
study
evaluates
photocatalytic
degradation
azo
Acid
Red
18
(AR18),
66
(AR66)
Orange
2
(OR2)
using
magnetite
as
catalyst.
The
magnetic
was
synthesized
via
hydrothermal
process
at
150°C.
Experiments
were
conducted
room
temperature,
investigating
effect
dosage,
pH,
initial
concentrations
H2O2
AR18
dye.
Kinetic
thermodynamic
studies
performed
25,
40
60°C
for
three
(AR18,
AR66
OR2)
dye
structures
on
efficiency
investigated.
At
25
°C
0.33
mmol.L-1
pH
3.0,
1.4
g.L-1
60
mg.L-1
under
UV
radiation
16.7
mW.cm-2
showed
62,3%
AR18,
79.6%
AR66,
83.8%
OR2
180
minutes
reaction.
oxidation
these
conditions
is
spontaneous
endothermic.
pseudo-first
order
kinetic
constants
indicated
strong
temperature
dependence
with
an
reactivity
type:
>
which
associated
characteristics
molecular
complexity
(size,
steric
hindrance,
aromatic
conjugation),
electrostatic
repulsion
nature
acid-base
interactions
catalytic
surface.
