In
this
work,
a
novel
alginate/polyvinylpyrrolidone
(SA/PVP-Fe)
hydrogel
spheres
were
prepared
by
cross-linking
with
Fe2+
ions
after
blending
sodium
alginate
polyvinylpyrrolidone.
The
degradation
performance
of
the
hydrogels
was
assessed
through
phenol,
achieving
100%
and
about
64%
total
organic
carbon
(TOC)
mineralization
within
60
minutes
(initial
concentration
phenol=20
mg/L;
H2O2
concentration=5
mM;
initial
pH=6.5;
catalyst
dosage=1.0
g/L).
Degradation
kinetics
monitored
using
high-performance
liquid
chromatography
(HPLC).
structural
chemical
properties
characterized
scanning
electron
microscopy
(SEM),
energy
spectroscopy
(EDS),
Fourier
transform
infrared
(FTIR),
X-ray
photoelectron
(XPS).
Additionally,
exhibited
multiple
reuse
cycles,
albeit
gradual
decline
in
performance.
Mechanistic
investigations
revealed
that
hydroxyl
radical
derived
from
Fenton
reaction
primary
active
species
responsible
for
process.
This
research
provides
valuable
insights
into
improving
mechanical
hydrogels,
opening
up
avenues
their
practical
applications.
Frontiers in Environmental Chemistry,
Journal Year:
2024,
Volume and Issue:
5
Published: May 29, 2024
The
objective
of
the
current
work
was
to
synthesize
and
characterize
ferromagnetic
activated
carbon
from
peanut
shells
(PSs)
apply
it
for
degradation
methyl
orange
(MO)
following
heterogeneous
Fenton
process.
PSs
were
with
phosphoric
acid
potassium
hydroxide
at
1:1,
1:2,
1:3
solid/liquid
activation
ratios
different
concentrations
(0.5,
1,
1.5
M)
pyrolized
500°C.
Based
on
iodine
indexes,
KOH-activated
adsorbents
exhibited
higher
porosity
than
H
3
PO
4
-activated
adsorbents.
a
ratio
(iodine
value
591
mg/g)
selected
magnetization
using
iron
(II)
ions
catalytic
mineralization
MO
dye.
(AC-PS@FeII)
characterized
Fourier-transform
infrared
(FTIR)
spectroscopy,
X-ray
diffraction
(XRD),
scanning
electron
microscopy
(SEM),
energy-dispersive
(EDX)
analysis,
nitrogen-adsorption
BET
measurements.
AC-PS@FeII
contained
ferromagnetite
cubic
spinel
structure
specific
area
181.96
m
2
·g
–1
.
degraded
efficiency
99.22%
pH
2,
g/L
catalyst
dosage,
50-min
contact
time.
results
recyclability
tests,
distilled
water,
revealed
slight
decrease
in
capacity
after
four
runs,
indicating
that
developed
appreciably
stable.
hetero-Fenton
could
be
an
ideal
treating
wastewater
contaminated
dyes
as
path
toward
circular
economy.
Technical Education Science/Giáo dục Kỹ thuật,
Journal Year:
2024,
Volume and Issue:
19(Special Issue 05), P. 12 - 20
Published: Dec. 28, 2024
In
this
study,
heterogeneous
catalysts
were
synthesized
by
hydrothermal
method
to
load
nano
goethite
biochar
derived
from
soybean
curd
residue,
which
served
as
for
the
degradation
of
tetracycline
hydrochloride
(TCH)
in
an
aqueous
solution.
The
catalytic
tests
using
composite
material
demonstrated
significant
TCH
degradation.
After
90
min
reaction,
optimum
solution
was
achieved.
initial
pH
value
and
concentration
set
at
2
50
mg/L,
respectively,
ambient
conditions
maintained.
results
showed
that
0.5
g/L
catalyst
60.0
mM
H2O2
ideal
reagent
dosages.
Experimental
data
second-order
kinetic
model
accurately
described
process
than
first-order
model.
study
biochar-loading
could
be
prepared
crud
residue
used
Additionally,
these
also
provide
a
new
approach
generation
might
help
reduce
costs
environmentally
friendly.
In
this
work,
a
novel
alginate/polyvinylpyrrolidone
(SA/PVP-Fe)
hydrogel
spheres
were
prepared
by
cross-linking
with
Fe2+
ions
after
blending
sodium
alginate
polyvinylpyrrolidone.
The
degradation
performance
of
the
hydrogels
was
assessed
through
phenol,
achieving
100%
and
about
64%
total
organic
carbon
(TOC)
mineralization
within
60
minutes
(initial
concentration
phenol=20
mg/L;
H2O2
concentration=5
mM;
initial
pH=6.5;
catalyst
dosage=1.0
g/L).
Degradation
kinetics
monitored
using
high-performance
liquid
chromatography
(HPLC).
structural
chemical
properties
characterized
scanning
electron
microscopy
(SEM),
energy
spectroscopy
(EDS),
Fourier
transform
infrared
(FTIR),
X-ray
photoelectron
(XPS).
Additionally,
exhibited
multiple
reuse
cycles,
albeit
gradual
decline
in
performance.
Mechanistic
investigations
revealed
that
hydroxyl
radical
derived
from
Fenton
reaction
primary
active
species
responsible
for
process.
This
research
provides
valuable
insights
into
improving
mechanical
hydrogels,
opening
up
avenues
their
practical
applications.
