Results in Chemistry,
Journal Year:
2024,
Volume and Issue:
10, P. 101693 - 101693
Published: July 31, 2024
Eco-friendly
and
effective
separation
of
photocatalytic
nanoparticles
from
the
reaction
mixture
is
crucial
to
facilitate
their
repeated
use
in
photocatalysis.
The
development
magnetic/semiconductor
nanocomposites
with
high
catalytic
performance
easy
an
efficient
strategy
for
wastewater
treatments.
In
this
study,
we
explore
potential
combination
magnetic
(CoFe2O4)
semiconductor
(ZnS)
synthesized
via
a
green
approach
using
Moringa
oleifera
leaf
extract
as
magnetically
separable
photocatalysts
dye
degradation.
X-ray
diffraction
analysis
confirmed
presence
cubic
spinel
ferrite
phase
CoFe2O4
zinc
blend
ZnS
within
nanocomposites.
micrographs
illustrated
nearly
spherical
average
particle
sizes
12
nm
26
CoFe2O4/ZnS,
respectively.
SO
suggested
incorporation
on
surface
CoFe2O4/ZnS
UV–visible
spectra
revealed
increase
band
gap
energy
3.7
4.5
eV
increasing
concentrations.
Magnetic
properties
signified
that
exhibited
ferromagnetic
characteristics.
optimal
degradation
efficiency
photodegradation
methylene
blue
was
observed
50
%,
achieving
78.3
%
80
min
intervals
20
min.
capability
allows
recycling
after
three
consecutive
cycles.
Therefore,
emerge
promising
candidates
removal
organic
pollutants
environments.
Environmental Technology & Innovation,
Journal Year:
2024,
Volume and Issue:
35, P. 103724 - 103724
Published: June 26, 2024
In
recent
years,
the
persistence
of
pharmaceutical
contaminants
like
metronidazole
(MNZ)
and
penicillin
G
(PG)
in
water
bodies
has
become
a
major
environmental
concern.
The
present
research
studied
simultaneous
degradation
MNZ
PG
utilizing
an
AgZnFe2O4@Ch
catalyst
generated
through
co-precipitation
technique
as
effective
stimulator
for
persulfate
(PS)
existence
UV
light.
structure
was
characterized
using
X-ray
powder
diffraction,
Fourier
transform
infrared
spectroscopy,
Field
emission
scanning
electron
microscopy,
vibrating-sample
magnetometer,
energy
dispersive
spectroscopy
mapping.
After
50
minutes
reaction
time
under
ideal
operating
conditions,
which
included
0.4
g/L
catalyst,
4
mM
PS,
5
mg/L
PG,
pH
5,
highest
81.5
%
82.3
were
obtained.
Statistical
parameters,
including
R2
values
0.985
0.981
indicate
very
good
agreement
between
predicted
observed
values.
Garson's
method
analysis
revealed
that
PS
dosage
had
greatest
impact
on
degradation,
while
initial
concentration
exerted
most
significant
influence
degradation.
Langmuir-Hinshelwood
model
surface
rate
constants
(Kc)
0.954
(mg/L.min)
adsorption
equilibrium
(KL-H)
0.032
(L/mg)
both
antibiotics,
respectively.
claimed
mechanism
illustrated
by
free
radical
scavenging
studies,
demonstrated
SO•4-
radicals
main
involved
PG.
A
last
investigation
catalyst's
regeneration
it
satisfactory
chemical
stability
after
five
cycles
usage
approaches.
Applied Water Science,
Journal Year:
2024,
Volume and Issue:
14(9)
Published: Aug. 13, 2024
Emerging
contaminants
such
as
ceftriaxone
are
a
significant
issue
in
the
environment.
They
have
led
to
series
of
ecological,
environmental,
and
health
issues,
it
is
urgent
find
green
secure
method
remove
antibiotics
from
water
effectively.
In
this
research,
CuCoFe2O4@Gum
Arabic
(GA)/Activated
Carbon
(AC)
an
innovative
bio-based
matrix
magnetic
nanocatalyst
was
synthesized
for
efficient
degradation
aqueous
media.
The
structure
CuCoFe2O4@GA/AC
characterized
via
FESEM,
EDS,
Mapping,
XRD,
FTIR,
VSM,
DRS
analyses.
structural
analysis
catalyst
revealed
its
synthesis
at
nanometer
scale
(40–50
nm),
exhibiting
high
strength
(Ms:
5.38
emu/g)
favorable
optical
properties
with
bandgap
3.6
eV.
Under
optimized
conditions,
including
pH
5,
60
min
irradiation
time,
0.24
g/L
photocatalyst
dose,
concentration
5
mg/L,
removal
efficiency
synthetic
real
samples
94.43%
62.5%,
respectively.
photocatalytic
process
followed
pseudo-first-order
Langmuir–Hinshelwood
kinetic
models.
Furthermore,
mechanism
indicated
prominent
role
superoxide
radical.
had
recovery
capability
chemical
stability.
by
showcased
remarkable
efficiency,
indicating
potential
utility
treatment
wastewater
contaminated
antibiotics.
Environmental Advances,
Journal Year:
2024,
Volume and Issue:
17, P. 100575 - 100575
Published: Aug. 9, 2024
The
use
of
nanoparticles
for
to
remove
organic
pollutants
and
heavy
metals
is
a
rapidly
expanding
field
in
environmental
sciences.
However,
process
optimization
practical,
real-world
applications
still
underexplored.
In
this
work,
copper
sulfide
prepared
from
single-source
precursor
were
characterized
using
SEM,
TEM,
EDX,
FTIR,
UV-visible
spectroscopy.
demonstrated
high
photocatalytic
degradation
efficiency
trypan
blue
(TB)
brilliant
green
(BG)
dyes.
as-prepared
efficiently
removed
lead(II)
(Pb2+)
chromium(VI)
(Cr6+)
ions.
Response
surface
methodology
(RSM)
with
Box-Behnken
design
(BBD)
was
employed
optimize
reaction
time,
pH,
nanoparticle
dosage.
optimal
conditions
TB
pH
10.91,
77.46
minutes,
4.999
g/L,
while
BG,
they
3,
70
5
g/L.
For
Pb2+
removal,
7.06,
100.38
0.94
Cr6+
3.03,
168.20
0.98
Under
these
conditions,
CuS
achieved
up
99.35%
TB,
100%
removal
Pb2+,
98.54%
Cr6+.
ANOVA
confirmed
the
models'
significance,
regression
coefficients
(R²:
0.9852
0.9846
0.9980
0.9901
Cr6+).
photocatalyst
remained
stable
over
three
reuse
cycles,
minimal
reduction
(8.88%
19.01%
BG).
This
study
demonstrates
effectiveness
remediation
highlights
practicality
RSM
as
efficient
materials
dyes
metal-laden
wastewater.
