Environmental Science & Technology,
Journal Year:
2024,
Volume and Issue:
58(24), P. 10415 - 10444
Published: June 7, 2024
Persulfate
(PS)-based
advanced
oxidation
processes
(AOPs)
for
pollutant
removal
have
attracted
extensive
interest,
but
some
controversies
about
the
identification
of
reactive
species
were
usually
observed.
This
critical
review
aims
to
comprehensively
introduce
basic
concepts
and
rectify
cognitive
biases
appeals
pay
more
attention
experimental
details
in
PS-AOPs,
so
as
accurately
explore
reaction
mechanisms.
The
scientifically
summarizes
character,
generation,
different
species.
It
then
highlights
complexities
analysis
electron
paramagnetic
resonance,
uncertainties
use
probes
scavengers,
necessities
determination
scavenger
concentration.
importance
choice
buffer
solution,
operating
mode,
terminator,
filter
membrane
is
also
emphasized.
Finally,
we
discuss
current
challenges
future
perspectives
alleviate
misinterpretations
toward
mechanisms
PS-AOPs.
Environmental Science & Technology,
Journal Year:
2024,
Volume and Issue:
58(11), P. 4844 - 4851
Published: Feb. 22, 2024
This
perspective
presents
the
latest
advancements
in
selective
polymerization
pathways
advanced
oxidation
processes
(AOPs)
for
removal
of
featured
organic
pollutants
wastewater.
In
radical-based
homogeneous
reactions,
SO4•
–-based
systems
exhibit
superior
oxidative
activity
toward
aromatics
with
electron-donating
substituents
via
single
electron
transfer
and
radical
adduct
formation
(RAF).
The
produced
cations
subsequently
undergo
coupling
reactions
to
produce
polymers.
For
•OH-based
oxidation,
metal
ions
facilitate
production
monomer
radicals
RAF.
Additionally,
heterogeneous
catalysts
can
mediate
both
persulfate
activation
without
generating
inorganic
radicals.
Metal-based
will
a
direct
pathway
polymerization.
contrast,
carbon-based
induce
low-molecular-weight
oligomers
(≤4
units)
an
process.
comparison
mineralization,
remarkably
reduce
peroxide
usage,
quickly
separate
from
aqueous
phase,
generate
polymeric
byproducts.
Thus,
AOP-driven
hold
significant
promise
reducing
carbon
emission
realizing
recycling
water
treatment
processes.
Heliyon,
Journal Year:
2023,
Volume and Issue:
9(6), P. e16461 - e16461
Published: May 26, 2023
In
this
research,
Fe3O4@HZSM-5
magnetic
nanocomposite
was
synthesized
via
a
coprecipitation
method
for
metronidazole
(MNZ)
degradation
from
aqueous
solutions
under
ultrasonic
irradiation
which
showed
superb
sonocatalytic
activity.
The
magnetite
characterized
by
using
field-emission
scanning
electron
microscope-energy
dispersive
X-ray
Spectroscopy,
(FESEM-EDS),
Line
Scan,
Dot
Mapping,
diffraction
(XRD),
vibrating
sample
magnetometer
(VSM),
and
Brunauer-Emmett-Teller
(BET).
To
investigate
the
activity
of
nanocomposite,
removal
conditions
were
optimized
evaluating
influences
operating
parameters
like
dosage
catalyst,
reaction
time,
pH,
concentration
H2O2,
MNZ
concentration,
pH
on
removal.
maximum
efficiency
TOC
at
time
40
min,
catalyst
dose
0.4
g/L,
H2O2
1
mM,
initial
25
mg/L,
7
achieved
98%
81%,
respectively.
Additionally,
in
real
wastewater
optimal
obtained
83%.
results
that
Langmuir-Hinshelwood
kinetic
model
KL-H
=
0.40
L
mg-1,
KC
1.38
mg/L
min)
can
describe
process.
radical
scavenger
tests
indicated
major
reactive
oxygen
species
formed
hydroxyl
radicals
Sono-Fenton-like
Evaluation
reusability
an
85%
reduction
after
seven
cycles.
Based
results,
it
be
concluded
as
heterogeneous
nano-catalysts
to
effectively
degrade
MNZ,
observed
stability
recyclability
demonstrated
promising
treatment
contaminated
with
antibiotics.
