Scientific Reports,
Journal Year:
2024,
Volume and Issue:
14(1)
Published: Nov. 26, 2024
In
this
study,
MnFe2O4
microspheres
were
synthesized
to
activate
potassium
persulfate
complex
salt
(Oxone)
for
the
degradation
of
17β-estradiol
(17β-E2)
in
aqueous
solutions.
The
characteristic
was
detected
by
XRD,
XPS
and
SEM-EDS.
experimental
results
indicated
that
17β-E2
followed
pseudo-first-order
kinetics.
At
25
°C,
concentration
0.5
mg/L,
dosage
100
Oxone
mmol/L,
initial
pH
value
6.5,
decomposition
efficiency
reached
82.9%
after
30
min
reaction.
Additionally,
free
radical
quenching
experiments
electron
paramagnetic
resonance
analysis
demonstrated
SO4−•
•OH
participated
reaction
process
whole
system,
with
being
main
reactive
oxygen
species
(ROS).
activation
mechanism
MnFe2O4/Oxone/17β-E2
system
is
proposed
as
follows:
initially
reacts
O2
H2O
solution
generate
active
Fe3+-OH
Mn2+-OH
species.
Subsequently,
react
a
heterogeneous
phase
process,
producing
highly
radicals.
After
four
cycles
material,
removal
rate
decreased
24.1%.
Catalysts,
Journal Year:
2024,
Volume and Issue:
14(10), P. 661 - 661
Published: Sept. 24, 2024
Estrogens,
widely
used
for
therapeutic
or
contraceptive
purposes,
act
as
endocrine
disruptors
in
aquatic
systems
and
have
adverse
effects
on
a
wide
range
of
living
organisms.
Wastewater
insufficiently
treated
by
conventional
methods
is
the
main
way
estrogens
to
enter
systems.
Therefore,
purpose
this
paper
develop
novel
photocatalytic
system
removal
estrogenic
mixture
estradiol
valerate/norgestrel
from
wastewater.
The
modules
are
operated
plug
flow
reactor
under
UV-A
radiation
field,
photocatalyst
(TiO2,
ZnO
TiO2/ZnO)
immobilized
an
inert
support
glass
balls
that
strung
stainless-steel
wire
arranged
rows
along
modules.
photocatalysts
were
synthesized
sol–gel
method
then
deposited
hot
method,
after
which
it
was
calcined
two
hours
at
temperature
500
°C.
experimental
results
showed
efficiency
degradation
largely
depends
dose
photocatalyst.
can
be
adjusted
adding
removing
modules,
each
approximately
equal
amount
best
result
obtained
TiO2/ZnO
photocatalyst,
organic
substrate
being
practically
mineralized
120
min,
only
needed.
Scientific Reports,
Journal Year:
2024,
Volume and Issue:
14(1)
Published: Nov. 26, 2024
In
this
study,
MnFe2O4
microspheres
were
synthesized
to
activate
potassium
persulfate
complex
salt
(Oxone)
for
the
degradation
of
17β-estradiol
(17β-E2)
in
aqueous
solutions.
The
characteristic
was
detected
by
XRD,
XPS
and
SEM-EDS.
experimental
results
indicated
that
17β-E2
followed
pseudo-first-order
kinetics.
At
25
°C,
concentration
0.5
mg/L,
dosage
100
Oxone
mmol/L,
initial
pH
value
6.5,
decomposition
efficiency
reached
82.9%
after
30
min
reaction.
Additionally,
free
radical
quenching
experiments
electron
paramagnetic
resonance
analysis
demonstrated
SO4−•
•OH
participated
reaction
process
whole
system,
with
being
main
reactive
oxygen
species
(ROS).
activation
mechanism
MnFe2O4/Oxone/17β-E2
system
is
proposed
as
follows:
initially
reacts
O2
H2O
solution
generate
active
Fe3+-OH
Mn2+-OH
species.
Subsequently,
react
a
heterogeneous
phase
process,
producing
highly
radicals.
After
four
cycles
material,
removal
rate
decreased
24.1%.
