Chemical Engineering Journal,
Год журнала:
2023,
Номер
479, С. 147170 - 147170
Опубликована: Ноя. 6, 2023
MnO2
can
be
used
in
advanced
oxidation
processes
to
activate
peroxydisulfate
(PS)
and
generate
reactive
species
such
as
sulfate
radicals
(SO4•-),
hydroxyl
(•OH)
singlet
oxygen
(1O2)
for
the
abatement
of
organic
water
contaminants.
Alternatively,
one
use
particulate
oxidant
which,
contrast
PS,
is
active
already
at
low
temperatures.
This
low-temperature
activity
particularly
attractive
situ
groundwater
treatment.
The
roles
PS
catalyst,
respectively,
may
invert:
functions
primary
works
re-oxidant
reduced
Mn-oxides.
In
this
way,
limited
capacity
overcome.
So
far,
reaction
systems
have
not
been
extensively
explored.
present
study,
degradation
4-hydroxybenzoic
acid
(HBA)
by
+
was
studied
under
various
experimental
conditions,
varying
temperature
(15–45
°C),
reagent
concentrations,
matrix.
Both
alone
ability
effect
HBA.
co-presence
MnO2,
a
fast
removal
HBA
from
achieved
even
temperatures
(half-life
about
0.5
h
with
2.4
g/L
25
owing
synergic
between
two
components.
Quenching
experiments
indicate
that
step
heterogeneous
on
surface
rather
than
homogeneous
driven
SO4•-
or
1O2,
frequently
reported
literature.
line
results
perfluorooctanoic
which
significantly
enhanced
presence
MnO2.
Applied Catalysis B Environment and Energy,
Год журнала:
2023,
Номер
342, С. 123457 - 123457
Опубликована: Ноя. 1, 2023
In
this
study,
we
developed
a
Cu0.5Fe2.5S4
nanocatalyst
through
facile
sulfidation
of
the
Cu-MIL-88B(Fe)
precursor
to
expedite
surface
Fe(III)
reduction
and
enhance
H2O2
activation
in
heterogeneous
electro-Fenton
(HEF).
The
as-prepared
catalyst
possesses
relatively
large
specific
area
uniformly
dispersed
metal
active
sites.
catalyzed
HEF
system
allowed
compete
removal
naproxen
with
minimal
leaching,
surpassing
that
or
Fe3S4.
Quantitative
XPS
analysis,
electrochemical
characterization
density
functional
theory
calculations
elucidate
an
electron
donor-shuttle
regime
S2-
Cu
species
serve
as
donor
shuttle,
respectively.
significantly
accelerate
internal
transfer
between
S
Fe
mitigate
dissolution
adjacent
iron
sites,
securing
sustainable
reducing
capacity.
Moreover,
Cu0.5Fe2.5S4-based
exhibits
great
practicability
for
treatment
various
organics
urban
wastewater.
This
study
opens
new
avenue
addressing
challenge
sluggish
Fe(III)/Fe(II)
cycling
HEF.
Catalysts,
Год журнала:
2025,
Номер
15(3), С. 236 - 236
Опубликована: Фев. 28, 2025
Iron
oxides
and
hydroxides
(Fe-OH)
extracted
from
natural
sources
have
garnered
significant
attention
for
their
diverse
catalytic
applications.
This
article
provides
a
comprehensive
overview
of
the
potential
naturally
occurring
Fe-OH,
focusing
on
influence
preparation
methods
morphological
characteristics
application
in
heterogeneous
catalysis.
The
unique
physicochemical
properties
these
catalysts,
including
high
surface
area,
redox
activity,
tunable
chemistry,
make
them
promising
candidates
various
processes.
review
discusses
key
reactions
facilitated
by
such
as
advanced
oxidation
processes
(AOPs),
electrochemical
applications,
cracking,
biodiesel
production.
Furthermore,
it
highlights
recent
advancements
challenges
utilizing
materials
catalysts.
By
presenting
an
analysis
iron
oxides,
this
aims
to
stimulate
further
research
about
use
materials,
which
are
widely
distributed
Earth’s
crust.
ACS ES&T Water,
Год журнала:
2024,
Номер
4(5), С. 2057 - 2063
Опубликована: Фев. 23, 2024
The
ecotoxicological
detoxification
assessment
of
a
wastewater
treatment
is
challenging
task
and
currently
complex
time-consuming.
This
work
preliminary
investigation
novel
simplified
tool
for
monitoring
the
potential
residual
ecotoxicity
liquid
wastes
after
Fenton
process
treatment.
Here,
three
zirconia-based
catalysts
modified
with
copper
or
iron
have
been
investigated
abatement
model
pollutant
(ibuprofen).
evaluation
waste
catalytic
has
carried
out
on
chromatography–mass
spectrometry
analysis
coupled
principal
component
analysis.
approach
provides
new
method
to
assess
by
evaluating
degradation
products
that
are
formed
during
process;
higher
number
their
corresponding
relative
abundance,
associated
treated
wastewater.
Besides,
aromaticity
reliable
parameter
toxicity
profile
effluents.
These
results
proved
first
time
this
rapid
analytical
suitable
wastes.
