Water Science & Technology,
Journal Year:
2024,
Volume and Issue:
89(12), P. 3344 - 3356
Published: June 10, 2024
ABSTRACT
In
this
study,
a
potassium
ferrate
(K2FeO4)-modified
biochar
(Fe–BC)
was
prepared
and
characterized.
Afterwards,
Fe–BC
applied
to
activated
periodate
(PI)
degrade
tetracycline
(TC),
an
antibiotic
widely
used
in
animal
farming.
The
degradation
effects
of
different
systems
on
TC
were
compared
the
influencing
factors
investigated.
addition,
several
reactive
oxygen
species
(ROS)
generated
by
Fe–BC/PI
system
identified,
pathways
analyzed.
Moreover,
reuse
performance
evaluated.
results
exhibited
that
could
remove
almost
100%
under
optimal
conditions
[BC]
=
1.09
g/L,
initial
[PI]
3.29
[TC]
20.3
mg/L.
Cl−,
HCO3−,
NO3−,
humic
acid
inhibited
varying
degrees
due
their
quenching
ROS.
degraded
into
intermediates
even
water
carbon
dioxide
synergistic
effect
ROS
Fe
BC
surface.
reused
four
times,
removal
rate
still
maintained
above
80%,
indicating
stable
nature
Fe–BC.
Water Research,
Journal Year:
2024,
Volume and Issue:
261, P. 122065 - 122065
Published: July 9, 2024
Peracetic
acid
(PAA)
has
received
increasing
attention
as
an
alternative
oxidant
for
wastewater
treatment.
However,
existing
processes
PAA
activation
to
generate
reactive
species
typically
require
external
energy
input
(e.g.,
electrically
and
UV-mediated
activation)
or
catalysts
Co2+),
inevitably
treatment
costs
introducing
potential
new
contaminants
that
necessitate
additional
removal.
In
this
work,
we
developed
a
catalyst-free,
self-sustaining
bioelectrochemical
approach
within
two-chamber
system
(BES),
where
cathode
electrode
in-situ
activates
using
renewable
biogenic
electrons
generated
by
anodic
exoelectrogens
Geobacter)
degrading
biodegradable
organic
matter
acetic
acid)
in
at
the
anode.
This
innovative
BES-PAA
technique
achieved
98
%
81
removal
of
2
µM
sulfamethoxazole
(SMX)
two
hours
pH
(cation
exchange
membrane)
6
(bipolar
100
μM
without
voltage.
Mechanistic
studies,
including
radical
quenching,
molecular
probe
validation,
electron
spin
resonance
(ESR)
experiments,
density
functional
theory
(DFT)
calculations,
revealed
SMX
degradation
was
driven
via
electron-mediated
OO
cleavage
PAA,
with
CH3C(O)OO•
contributing
68.1
%,
•OH
18.4
CH3C(O)O•
9.4
initial
formation
rapidly
reacts
produce
CH3C(O)OO•.
The
presence
common
water
constituents
such
anions
Cl−,
NO3−,
H2PO4−)
humic
(HA)
significantly
hinders
technique,
whereas
CO32−
HCO3−
ions
have
comparatively
minor
impact.
Additionally,
study
investigated
various
pharmaceuticals
present
secondary
treated
municipal
wastewater,
attributing
differences
efficiency
selective
action
research
demonstrates
novel
method
is
ecologically
benign,
inexpensive,
capable
overcoming
catalyst
deactivation
pollution
issues.
Ecotoxicology and Environmental Safety,
Journal Year:
2025,
Volume and Issue:
289, P. 117700 - 117700
Published: Jan. 1, 2025
In
this
study,
manganese
oxide
supported
biochar
(MBC)
was
used
as
a
catalyst
of
periodate
(PI)
for
the
oxidative
degradation
sulfonamide
antibiotic
sulfamethazine
(SMZ).
The
rate
10
mg/L
SMZ
reached
99
%
in
60
min
MBC/PI
system,
and
optimal
condition
pH
3.5,
0.12
g/L
MBC,
0.17
mM
PI.
Combined
with
quenching
experiment
electron
paramagnetic
resonance
(EPR)
characterization,
it
determined
that
reactive
oxygen
species
(ROS)
participating
reaction
include
iodate
radical
(IO
